Staff profile

Research Interests (Astronomy)

My research focuses on the study of interacting binaries. These are systems that are comprised a compact object (Black Hole, Neutron Star or White Dwarf) in a close binary orbit with a (usually) less evolved star. I use the variability of the light emitted from such sources to probe the different components of the binary (the donor star, accretion disk, compact object and out-flowing jet). This involves observing the sources at a number of wavelengths to probe the different regions. These include X-rays (RXTE, SWIFT and XMM), Optical/UV (VLT, Keck, WHT, Palomar 200-inch and HST) and Infra-red (VLT) observations. I combine these observations to indirectly image the systems in order to better understand the interactions of light and matter in these extreme physical environments.

Research Interests (Instrumentation)

My research focuses on the development of instrumenation based around Kinetic Inductance Detectors (KIDs). These are superconducting detectors that are capable of measuring the arrival time of individual optical/near-IR photons to ~1microsecond and simultaneously measuring their energy to ~5-10%. I am working with teams in Europe and the US to develop uniquely powerful instruments based around arrays of 1000's of such devices.

• Centre for Advanced Instrumentation

• Astronomy and Astrophysics
• Centre for Advanced Instrumentation

Conference Paper

• Calcines Rosario, Ariadna Z., Wells, Martyn, O’Brien, Kieran S., Morris, Simon L., Seifert, Walter, Zanutta, Alessio, Evans, Chris & Di Marcantonio, Paolo (2022), CUBES: application of image slicers to reformat the field for two spectral resolving powers, in Navarro, Ramón & Geyl, Roland eds, 12188: Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V. SPIE.
• Thatte, Niranjan A., Clarke, Fraser, Bryson, Ian, Shnetler, Hermine, Tecza, Matthias, Fusco, Thierry, Bacon, Roland M., Richard, Johan, Mediavilla, Evencio, Neichel, Benoît, Arribas, Santiago, Garcia-Lorenzo, Begoña, Evans, Christopher J., Remillieux, Alban, El Madi, Kacem, Herreros, Jose Miguel, Melotte, Dave, O'Brien, Kieran, Tosh, Ian A., Vernet, Joël, Hammersley, Peter, Ives, Derek J., Finger, Gert, Houghton, Ryan, Rigopoulou, Dimitra, Lynn, James D., Allen, Jamie R., Zieleniewski, Simon D., Kendrew, Sarah, Ferraro-Wood, Vanessa, Pécontal-Rousset, Arlette, Kosmalski, Johan, Laurent, Florence, Loupias, Magali, Piqueras, Laure, Renault, Edgar, Blaizot, Jeremy, Daguisé, Eric, Migniau, Jean-Emmanuel, Jarno, Aurélien, Born, Andy, Gallie, Angus M., Montgomery, David M., Henry, David, Schwartz, Noah, Taylor, William, Zins, Gérard, Rodríguez-Ramos, Luis Fernando, Cagigas, Miguel, Battaglia, Giuseppina, Rebolo López, Refael, Hernández Suárez, Elvio, Gigante-Ripoll, José Vicente, Piqueras López, Javier, Villa Martin, Montserrat, Correia, Carlos, Pascal, Sandrine, Blanco, Leonardo, Vola, Pascal, Epinat, Benoit, Peroux, Celine, Vigan, Arthur, Dohlen, Kjetil, Sauvage, Jean-Francois, Lee, Martin, Carlotti, Alexis, Verinaud, Christophe, Morris, Tim, Myers, Richard, Reeves, Andrew, Swinbank, Mark, Calcines, Ariadna & Larrieu, Marrie (2016), The E-ELT first light spectrograph HARMONI: capabilities and modes, in Evans, Christopher J., Simard, Luc & Takami, Hideki eds, 9908: Ground-based and Airborne Instrumentation for Astronomy VI,: SPIE Astronomical Telescopes + Instrumentation, 2016. Edinburgh, SPIE.

Journal Article

• Calcines, Ariadna, Wells, Martyn, O’Brien, Kieran, Morris, Simon, Seifert, Walter, Zanutta, Alessio, Evans, Chris & Di Marcantonio, Paolo (2023). Design of the VLT-CUBES image slicers: Field re-formatters to provide two spectral resolutions. Experimental Astronomy 55(1): 267–280.
• Vincentelli, F M, Casella, P, Russell, D M, Baglio, M C, Veledina, A, Maccarone, T, Malzac, J, Fender, R, O’Brien, K & Uttley, P (2021). Fast infrared variability from the black hole candidate MAXI J1535−571 and tight constraints on the modelling. Monthly Notices of the Royal Astronomical Society 503(1): 614-624.
• Dodkins, Rupert H., Davis, Kristina K., Lewis, Briley, Mahashabde, Sumedh, Mazin, Benjamin A., Lipartito, Isabel A., Fruitwala, Neelay, O’Brien, Kieran & Thatte, Niranjan (2020). First Principle Simulator of a Stochastically Varying Image Plane for Photon-counting High Contrast Applications. Publications of the Astronomical Society of the Pacific 132(1016): 104503.
• O’Brien, Kieran (2020). KIDSpec: An MKID-Based Medium-Resolution, Integral Field Spectrograph. Journal of Low Temperature Physics 199(1-2): 537-546.
• Vincentelli, F. M., Casella, P., Petrucci, P., Maccarone, T., Russell, D. M., Uttley, P., Marco, B. De, Fender, R., Gandhi, P., Malzac, J., O’Brien, K. & Tomsick, J. A. (2019). Physical Constraints from Near-infrared Fast Photometry of the Black Hole Transient GX 339–4. The Astrophysical Journal 887(1): L19.
• Cristina Baglio, Maria, Russell, David M., Casella, Piergiorgio, Al Noori, Hind, Al Yazeedi, Aisha, Belloni, Tomaso, Buckley, David A. H., Cadolle Bel, Marion, Ceccobello, Chiara, Corbel, Stephane, Coti Zelati, Francesco, Díaz Trigo, Maria, Fender, Rob P., Gallo, Elena, Gandhi, Poshak, Homan, Jeroen, Koljonen, Karri I. I., Lewis, Fraser, Maccarone, Thomas J., Malzac, Julien, Markoff, Sera, Miller-Jones, James C. A., O’Brien, Kieran, Russell, Thomas D., Saikia, Payaswini, Shahbaz, Tariq, Sivakoff, Greg R., Soria, Roberto, Testa, Vincenzo, Tetarenko, Alexandra J., van den Ancker, Mario E. & Vincentelli, Federico M. (2018). A Wildly Flickering Jet in the Black Hole X-Ray Binary MAXI J1535–571. The Astrophysical Journal 867(2): 114.
• Malzac, Julien, Kalamkar, Maithili, Vincentelli, Federico, Vue, Alexis, Drappeau, Samia, Belmont, Renaud, Casella, Piergiorgio, Clavel, Maïca, Corbel, Stphane, Coriat, Mickaël, Dornic, Damien, Ferreira, Jonathan, Henri, Gilles, Maccarone, Thomas J, Marcowith, Alexandre, O’Brien, Kieran, Péault, Mathias, Petrucci, Pierre-Olivier, Rodriguez, Jérome, Russell, David M & Uttley, Phil (2018). A jet model for the fast IR variability of the black hole X-ray binary GX 339-4. Monthly Notices of the Royal Astronomical Society 480(2): 2054-2071.
• Vincentelli, F. M., Casella, P., Maccarone, T. J., Uttley, P., Gandhi, P., Belloni, T., De Marco, B., Russell, D. M., Stella, L. & O'Brien, K. (2018). Characterization of the infrared/X-ray subsecond variability for the black hole transient GX 339-4. Monthly Notices of the Royal Astronomical Society 477(4): 4524-4533.
• Dodkins, R., Mahashabde, S., O’Brien, K., Thatte, N., Fruitwala, N., Walter, A.B., Meeker, S.R., Szypryt, P. & Mazin, B.A. (2018). MKID digital readout tuning with deep learning. Astronomy and Computing 23: 60-71.
• Wang, L., Steeghs, D., Casares, J., Charles, P. A., Muñoz-Darias, T., Marsh, T. R., Hynes, R. I. & O'Brien, K. (2017). System mass constraints for the accreting millisecond pulsar XTE J1814-338 using Bowen fluorescence. Monthly Notices of the Royal Astronomical Society 466(2): 2261-2271.
• Kalamkar, M., Casella, P., Uttley, P., O'Brien, K., Russell, D., Maccarone, T., van der Klis, M. & Vincentelli, F. (2016). Detection of the first infra-red quasi-periodic oscillation in a black hole X-ray binary. Monthly Notices of the Royal Astronomical Society 460(3): 3284-3291.
• Kendrew, S., Zieleniewski, S., Houghton, R. C. W., Thatte, N., Devriendt, J., Tecza, M., Clarke, F., O'Brien, K. & Häußler, B. (2016). Simulated stellar kinematics studies of high-redshift galaxies with the HARMONI Integral Field Spectrograph. Monthly Notices of the Royal Astronomical Society 458(3): 2405-2422.
• van Eyken, J. C., Strader, M. J., Walter, A. B., Meeker, S. R., Szypryt, P., Stoughton, C., O'Brien, K., Marsden, D., Rice, N. K., Lin, Y. & Mazin, B. A. (2015). The ARCONS Pipeline: Data Reduction for MKID Arrays. The Astrophysical Journal Supplement Series 219.
• Gandhi, P., Shaw, A. W., Pahari, M., Littlefair, S., Hardy, L., Dhillon, V., Marsh, T. R., Casella, P., Charles, P. A., Done, C., Russell, D. M., Shahbaz, T., Casares, J., Munoz-Darias, T., Tomsick, J., O'Brien, K., Kuulkers, E., Altamirano, D., Knigge, C., Motta, S. & Walton, D. (2015). Correlated Optical and X-ray variability in V404 Cyg. The Astronomer's Telegram 7727.
• Dhillon, V. S., Marsh, T. R., Atkinson, D. C., Bezawada, N., Bours, M. C. P., Copperwheat, C. M., Gamble, T., Hardy, L. K., Hickman, R. D. H., Irawati, P., Ives, D. J., Kerry, P., Leckngam, A., Littlefair, S. P., McLay, S. A., O'Brien, K., Peacocke, P. T., Poshyachinda, S., Richichi, A., Soonthornthum, B. & Vick, A. (2015). Erratum: ULTRASPEC: a high-speed imaging photometer on the 2.4-m Thai National Telescope. Monthly Notices of the Royal Astronomical Society 446: 2870.
• Szypryt, P., Duggan, G. E., Mazin, B. A., Meeker, S. R., Strader, M. J., van Eyken, J. C., Marsden, D., O'Brien, K., Walter, A. B., Ulbricht, G., Prince, T. A., Stoughton, C. & Bumble, B. (2014). Direct detection of SDSS J0926+3624 orbital expansion with ARCONS. Monthly Notices of the Royal Astronomical Society 439(3): 2765-2770.
• Dhillon, V. S., Marsh, T. R., Atkinson, D. C., Bezawada, N., Bours, M. C. P., Copperwheat, C. M., Gamble, T., Hardy, L. K., Hickman, R. D. H., Irawati, P., Ives, D. J., Kerry, P., Leckngam, A., Littlefair, S. P., McLay, S. A., O'Brien, K., Peacocke, P. T., Poshyachinda, S., Richichi, A., Soonthornthum, B. & Vick, A. (2014). ULTRASPEC: a high-speed imaging photometer on the 2.4-m Thai National Telescope. Monthly Notices of the Royal Astronomical Society 444: 4009-4021.
• Russell, D. M., Markoff, S., Casella, P., Cantrell, A. G., Chatterjee, R., Fender, R. P., Gallo, E., Gandhi, P., Homan, J., Maitra, D., Miller-Jones, J. C. A., O'Brien, K. & Shahbaz, T. (2013). Jet spectral breaks in black hole X-ray binaries. Monthly Notices of the Royal Astronomical Society 429: 815-832.
• Mazin, B. A., Meeker, S. R., Strader, M. J., Szypryt, P., Marsden, D., van Eyken, J. C., Duggan, G. E., Walter, A. B., Ulbricht, G., Johnson, M., Bumble, B., O'Brien, K. & Stoughton, C. (2013). ARCONS: A 2024 Pixel Optical through Near-IR Cryogenic Imaging Spectrophotometer. Publications of the Astronomical Society of the Pacific 125: 1348.
• Russell, D. M., Russell, T. D., Miller-Jones, J. C. A., O'Brien, K., Soria, R., Sivakoff, G. R., Slaven-Blair, T., Lewis, F., Markoff, S., Homan, J., Altamirano, D., Curran, P. A., Rupen, M. P., Belloni, T. M., Cadolle Bel, M., Casella, P., Corbel, S., Dhawan, V., Fender, R. P., Gallo, E., Gandhi, P., Heinz, S., Körding, E. G., Krimm, H. A., Maitra, D., Migliari, S., Remillard, R. A., Sarazin, C. L., Shahbaz, T. & Tudose, V. (2013). An Evolving Compact Jet in the Black Hole X-Ray Binary MAXI J1836-194. The Astrophysical Journal Letters 768.
• Strader, M. J., Johnson, M. D., Mazin, B. A., Spiro Jaeger, G. V., Gwinn, C. R., Meeker, S. R., Szypryt, P., van Eyken, J. C., Marsden, D., O'Brien, K., Walter, A. B., Ulbricht, G., Stoughton, C. & Bumble, B. (2013). Excess Optical Enhancement Observed with ARCONS for Early Crab Giant Pulses. The Astrophysical Journal Letters 779.
• Marsden, Danica W., Mazin, Benjamin A., O'Brien, Kieran & Hirata, Chris (2013). Giga-z: A 100,000 Object Superconducting Spectrophotometer for LSST Follow-up. The Astrophysical Journal Supplement Series 208.
• Russell, D. M., Curran, P. A., Muñoz-Darias, T., Lewis, F., Motta, S., Stiele, H., Belloni, T., Miller-Jones, J. C. A., Jonker, P. G., O'Brien, K., Homan, J., Casella, P., Gandhi, P., Soleri, P., Markoff, S., Maitra, D., Gallo, E. & Cadolle Bel, M. (2012). A late jet rebrightening revealed from multiwavelength monitoring of the black hole candidate XTE J1752-223. Monthly Notices of the Royal Astronomical Society 419: 1740-1751.
• Mazin, Benjamin A., Bumble, Bruce, Meeker, Seth R., O'Brien, Kieran, McHugh, Sean & Langman, Eric (2012). A superconducting focal plane array for ultraviolet, optical, and near-infrared astrophysics. Optics Express 20: 1503.
• McHugh, Sean, Mazin, Benjamin A., Serfass, Bruno, Meeker, Seth, O'Brien, Kieran, Duan, Ran, Raffanti, Rick & Werthimer, Dan (2012). A readout for large arrays of microwave kinetic inductance detectors. Review of Scientific Instruments 83: 044702.
• Russell, D. M., O'Brien, K., Muñoz-Darias, T., Casella, P., Gandhi, P. & Revnivtsev, M. G. (2012). The near-infrared counterpart of 4U 1636-53. Astronomy and Astrophysics 539.
• Cornelisse, R., D'Avanzo, P., Campana, S., Casares, J., Charles, P. A., Israel, G., Muñoz-Darias, T., O'Brien, K., Steeghs, D., Stella, L. & Torres, M. A. P. (2012). The nature of the X-ray transient MAXI J0556-332. Monthly Notices of the Royal Astronomical Society 420: 3538-3544.
• Durant, Martin, Shahbaz, Tariq, Gandhi, Poshak, Cornelisse, Remon, Muñoz-Darias, Teodoro, Casares, Jorge, Dhillon, Vik, Marsh, Tom, Spruit, Hendrik, O'Brien, Kieran, Steeghs, Danny & Hynes, Rob (2011). High time resolution optical/X-ray cross-correlations for X-ray binaries: anticorrelations and rapid variability. Monthly Notices of the Royal Astronomical Society 410: 2329-2338.
• Patat, F., Moehler, S., O'Brien, K., Pompei, E., Bensby, T., Carraro, G., de Ugarte Postigo, A., Fox, A., Gavignaud, I., James, G., Korhonen, H., Ledoux, C., Randall, S., Sana, H., Smoker, J., Stefl, S. & Szeifert, T. (2011). Optical atmospheric extinction over Cerro Paranal. Astronomy and Astrophysics 527.
• Russell, D. M., Belloni, T., Miller-Jones, J. C. A., O'Brien, K., Gandhi, P., Cadolle Bel, M., Markoff, S., Casella, P., Homan, J., Gallo, E., Fender, R. P., Shahbaz, T. & Corbel, S. (2011). Bright mid-infrared detections of MAXI J1836-194 with VISIR on the VLT: brightening of the compact jet. The Astronomer's Telegram 3689.
• Casella, P., Maccarone, T. J., O'Brien, K., Fender, R. P., Russell, D. M., van der Klis, M., Pe'Er, A., Maitra, D., Altamirano, D., Belloni, T., Kanbach, G., Klein-Wolt, M., Mason, E., Soleri, P., Stefanescu, A., Wiersema, K. & Wijnands, R. (2010). Fast infrared variability from a relativistic jet in GX 339-4. Monthly Notices of the Royal Astronomical Society 404: L21-L25.
• Moehler, Sabine, Freudling, Wolfram, Møller, Palle, Patat, Ferdinando, Rupprecht, Gero & O'Brien, Kieran (2010). Correction of Field Rotator-Induced Flat-Field Systematics--A Case Study Using Archived VLT-FORS Data. Publications of the Astronomical Society of the Pacific 122: 93.
• O'Brien, Kieran (2009). FORS in the Era of Second Generation VLT Instrumentation. Astrophysics and Space Science Proceedings 9: 377.
• Muñoz-Darias, T., Casares, J., O'Brien, K., Steeghs, D., Martínez-Pais, I. G., Cornelisse, R. & Charles, P. A. (2009). Dynamical constraints on the neutron star mass in EXO 0748-676. Monthly Notices of the Royal Astronomical Society 394: L136-L140.
• Shahbaz, T., Fender, R. P., Watson, C. A. & O'Brien, K. (2008). The First Polarimetric Signatures of Infrared Jets in X-Ray Binaries. The Astrophysical Journal 672.
• Dall, T. H., Foellmi, C., Pritchard, J., Lo Curto, G., Allende Prieto, C., Bruntt, H., Amado, P. J., Arentoft, T., Baes, M., Depagne, E., Fernandez, M., Ivanov, V., Koesterke, L., Monaco, L., O'Brien, K., Sarro, L. M., Saviane, I., Scharwächter, J., Schmidtobreick, L., Schütz, O., Seifahrt, A., Selman, F., Stefanon, M. & Sterzik, M. (2007). VSOP: the variable star one-shot project. I. Project presentation and first data release. Astronomy and Astrophysics 470: 1201-1214.
• Cornelisse, R., Steeghs, D., Casares, J., Charles, P. A., Barnes, A. D., Hynes, R. I. & O'Brien, K. (2007). Optical spectroscopy of the low-mass X-ray binary GX9+9. Monthly Notices of the Royal Astronomical Society 380: 1219-1229.
• Szeifert, Thomas, Reiss, Roland, Baksai, Pedro, Deiries, Sebastian, Izzo, Carlo, Jehin, Emmanuel, Kiekebusch, Mario, Moehler, Sabine, O'Brien, Kieran, Pompei, Emanuela, Riquelme, Miguel, Rupprecht, Gero & Shen, Tzu-Chiang (2007). FORS1 is getting Blue: New Blue Optimised Detectors and High Throughput Filters. The Messenger 128.
• Dhillon, V. S., Marsh, T. R., Stevenson, M. J., Atkinson, D. C., Kerry, P., Peacocke, P. T., Vick, A. J. A., Beard, S. M., Ives, D. J., Lunney, D. W., McLay, S. A., Tierney, C. J., Kelly, J., Littlefair, S. P., Nicholson, R., Pashley, R., Harlaftis, E. T. & O'Brien, K. (2007). ULTRACAM: an ultrafast, triple-beam CCD camera for high-speed astrophysics. Monthly Notices of the Royal Astronomical Society 378: 825-840.
• Cornelisse, R., Steeghs, D., Casares, J., Charles, P. A., Shih, I. C., Hynes, R. I. & O'Brien, K. (2007). A signature of the donor star in the extra-galactic X-ray binary LMCX-2. Monthly Notices of the Royal Astronomical Society 381: 194-200.
• Freudling, Wolfram, Møller, Palle, Patat, Ferdinando, Moehler, Sabine, Romaniello, Martino, Jehin, Emmanuël, O'Brien, Kieran, Izzo, Carlo, Depagne, Eric, Pompei, Emanuela, Naef, Dominique, Rupprecht, Gero & Järvinen, Arto (2007). Towards Precision Photometry with FORS: A Status Report. The Messenger 128.
• Dhillon, V., Marsh, T., Copperwheat, C., Bezawada, N., Ives, D., Vick, A. & O'Brien, K. (2007). ULTRASPEC: High-speed Spectroscopy with Zero Read-out Noise. The Messenger 127.
• Cornelisse, R., Casares, J., Steeghs, D., Barnes, A. D., Charles, P. A., Hynes, R. I. & O'Brien, K. (2007). A detection of the donor star of Aquila X-1 during its 2004 outburst? Monthly Notices of the Royal Astronomical Society 375: 1463-1470.
• Barnes, A. D., Casares, J., Cornelisse, R., Charles, P. A., Steeghs, D., Hynes, R. I. & O'Brien, K. (2007). Kinematical studies of the low-mass X-ray binary GRMus (XB1254-690). Monthly Notices of the Royal Astronomical Society 380: 1182-1190.
• Hynes, R. I., Horne, Keith, O'Brien, K., Haswell, C. A., Robinson, E. L., King, A. R., Charles, P. A. & Pearson, K. J. (2006). Multiwavelength Observations of EXO 0748-676. I. Reprocessing of X-Ray Bursts. The Astrophysical Journal 648: 1156-1168.
• Pearson, K. J., Hynes, R. I., Steeghs, D., Jonker, P. G., Haswell, C. A., King, A. R., O'Brien, K., Nelemans, G. & Méndez, M. (2006). Multiwavelength Observations of EXO 0748-676. II. Emission-Line Behavior. The Astrophysical Journal 648: 1169-1180.
• Casares, J., Cornelisse, R., Steeghs, D., Charles, P. A., Hynes, R. I., O'Brien, K. & Strohmayer, T. E. (2006). Detection of the irradiated donor in the LMXBs 4U 1636-536 (=V801 Ara) and 4U 1735-444 (=V926 Sco). Monthly Notices of the Royal Astronomical Society 373: 1235-1244.
• in't Zand, J. J. M., Jonker, P. G., Nelemans, G., Steeghs, D. & O'Brien, K. (2006). Optical identification of IGR J19140+0951. Astronomy and Astrophysics 448: 1101-1106.
• Vreeswijk, P., Marsh, T., Littlefair, S., Dhillon, V. & O'Brien, K. (2005). GRB 050520: VLT/ULTRACAM observations. GRB Coordinates Network 3445.
• Brocksopp, C., Corbel, S., Fender, R. P., Rupen, M., Sault, R., Tingay, S. J., Hannikainen, D. & O'Brien, K. (2005). The 2003 radio outburst of a new X-ray transient: XTE J1720-318. Monthly Notices of the Royal Astronomical Society 356: 125-130.
• Kuiper, L., Jonker, P., Hermsen, W. & O'Brien, K. (2005). Chandra imaging of IGR J16493-4348. The Astronomer's Telegram 654.
• Hynes, R. I., Charles, P. A., van Zyl, L., Barnes, A., Steeghs, D., O'Brien, K. & Casares, J. (2004). Spectroscopy of the optical counterpart to Ser X-1. Monthly Notices of the Royal Astronomical Society 348: 100-104.
• Alloin, D., Mason, E. & O'Brien, K. (2004). The Visit of Prof. R. Sunayev and the Topical Meeting "Accretion onto Compact Objects". The Messenger 116: 44.
• Hynes, R. I., Steeghs, D., Casares, J., Charles, P. A. & O'Brien, K. (2004). The Distance and Interstellar Sight Line to GX 339-4. The Astrophysical Journal 609: 317-324.
• O'Brien, K., Horne, Keith, Gomer, Richard H., Oke, J. B. & van der Klis, M. (2004). High-speed Keck II and RXTE spectroscopy of Cygnus X-2 - I. Three X-ray components revealed by correlated variability. Monthly Notices of the Royal Astronomical Society 350: 587-595.
• Hynes, R. I., Haswell, C. A., Cui, W., Shrader, C. R., O'Brien, K., Chaty, S., Skillman, D. R., Patterson, J. & Horne, Keith (2003). The remarkable rapid X-ray, ultraviolet, optical and infrared variability in the black hole XTE J1118+480. Monthly Notices of the Royal Astronomical Society 345: 292-310.
• Hynes, R. I., Steeghs, D., Casares, J., Charles, P. A. & O'Brien, K. (2003). Dynamical Evidence for a Black Hole in GX 339-4. The Astrophysical Journal Letters 583: L95-L98.
• Skidmore, Warren, O'Brien, Kieran, Horne, Keith, Gomer, Richard, Oke, J. B. & Pearson, K. J. (2003). High-speed Keck spectroscopy of flares and oscillations in AE Aquarii. Monthly Notices of the Royal Astronomical Society 338: 1057-1066.
• O'Brien, Kieran, Clarke, Fraser, Fender, Rob, Brocksopp, Catherine, Steeghs, Danny, Hynes, Rob & Charles, Phil (2003). Improved IR (ISAAC/VLT) and radio (ATCA) astrometry of the likely counterpart to XTE J1720-318. The Astronomer's Telegram 117.
• Casares, J., Steeghs, D., Hynes, R. I., Charles, P. A. & O'Brien, K. (2003). Bowen Fluorescence from the Companion Star in X1822-371. The Astrophysical Journal 590: 1041-1048.
• O'Brien, K., Horne, Keith, Hynes, R. I., Chen, W., Haswell, C. A. & Still, M. D. (2002). Echoes in X-ray binaries. Monthly Notices of the Royal Astronomical Society 334: 426-434.
• Fender, R. P., Rayner, D., Trushkin, S. A., O'Brien, K., Sault, R. J., Pooley, G. G. & Norris, R. P. (2002). Spectral, polarization and time-lag properties of GRS 1915+105 radio oscillations. Monthly Notices of the Royal Astronomical Society 330: 212-218.
• Still, Martin, O'Brien, Kieran, Horne, Keith, Hudson, Danny, Boroson, Bram, Vrtilek, Saeqa Dil, Quaintrell, Hannah & Fiedler, Hauke (2001). RXTE Observations of Hercules X-1 during the 1998 July Short High State. The Astrophysical Journal 553: 776-787.
• O'Brien, K., Horne, Keith, Boroson, B., Still, M., Gomer, R., Oke, J. B., Boyd, P. & Vrtilek, S. D. (2001). Keck II spectroscopy of mHz quasi-periodic oscillations in Hercules X-1. Monthly Notices of the Royal Astronomical Society 326: 1067-1075.
• Vrtilek, S. D., Quaintrell, H., Boroson, B., Still, M., Fiedler, H., O'Brien, K. & McCray, R. (2001). Multiwavelength Studies of Hercules X-1 during Short High and Anomalous Low States: On-again, Off-again. The Astrophysical Journal 549: 522-536.
• Still, Martin, O'Brien, Kieran, Horne, Keith, Boroson, Bram, Titarchuk, Lev G., Engle, Kimberly, Vrtilek, Saeqa D., Quaintrell, Hannah & Fiedler, Hauke (2001). Atmospheric Reflection during an Anomalous Low State of Hercules X-1. The Astrophysical Journal 554: 352-361.
• Steeghs, D., O'Brien, K., Horne, Keith, Gomer, Richard & Oke, J. B. (2001). Emission-line oscillations in the dwarf nova V2051 Ophiuchi. Monthly Notices of the Royal Astronomical Society 323: 484-496.
• Boroson, Bram, O'Brien, Kieran, Horne, Keith, Kallman, Timothy, Still, Martin, Boyd, Patricia T., Quaintrell, Hannah & Vrtilek, Saeqa Dil (2000). Discovery of Millihertz ULTRAVIOLET Quasi-periodic Oscillations in Hercules X-1. The Astrophysical Journal 545: 399-406.
• Hynes, R. I., Haswell, C. A., Norton, A. J., Chaty, S., Solheim, J. E., Ostensen, R., Abbott, T. M. C., Fried, R., McFarland, J., Rolfe, D. J., Lott, D. A., Ioannou, Z., Shafter, A., O'Brien, K., Horne, K., Krisciunas, K. & Ivison, R. J. (1999). XTE J1859+226. International Astronomical Union Circular 7294.
• Hynes, R. I., Haswell, C. A., Norton, A. J., Chaty, S., Rolfe, D. J., Lott, D. A., Solheim, J.-E., Ostensen, R., Garcia, R. A., Fried, R., O'Brien, K., Horne, K., Ioannou, Z., Shafter, A., Abbott, T. M. C., Krisciunas, K., Ivison, R. J., Sano, Y., Chen, W., Shrader, C., Livio, M., Robinson, E. L. & Wagner, R. M. (1999). Optical and near-IR observations of XTE J1859+226. The Astronomer's Telegram 50.
• Hynes, R. I., O'Brien, K., Horne, Keith, Chen, W. & Haswell, C. A. (1998). Echoes from an irradiated disc in GRO J1655-40. Monthly Notices of the Royal Astronomical Society 299: L37-L41.
• Aragon-Salamanca, Alfonso, Ellis, Richard S. & O'Brien, Kieran S. (1996). Faint galaxies close to QSOs with damped Lyman alpha absorption systems. Monthly Notices of the Royal Astronomical Society 281: 945-952.

Other (Print)

• Thatte, Niranjan A., Clarke, Fraser, Bryson, Ian, Shnetler, Hermine, Tecza, Matthias, Fusco, Thierry, Bacon, Roland M., Richard, Johan, Mediavilla, Evencio, Neichel, Benoît, Arribas, Santiago, Garcia-Lorenzo, Begoña., Evans, Christopher J., Remillieux, Alban, El Madi, Kacem, Herreros, Jose Miguel, Melotte, Dave, O'Brien, Kieran, Tosh, Ian A., Vernet, Joël., Hammersley, Peter, Ives, Derek J., Finger, Gert, Houghton, Ryan, Rigopoulou, Dimitra, Lynn, James D., Allen, Jamie R., Zieleniewski, Simon D., Kendrew, Sarah, Ferraro-Wood, Vanessa, Pécontal-Rousset, Arlette, Kosmalski, Johan, Laurent, Florence, Loupias, Magali, Piqueras, Laure, Renault, Edgar, Blaizot, Jeremy, Daguisé, Eric, Migniau, Jean-Emmanuel, Jarno, Aurélien, Born, Andy, Gallie, Angus M., Montgomery, David M., Henry, David, Schwartz, Noah, Taylor, William, Zins, Gérard, Rodríguez-Ramos, Luis Fernando, Cagigas, Miguel, Battaglia, Giuseppina, Rebolo López, Refael, Hernández Suárez, Elvio, Gigante-Ripoll, José Vicente, Piqueras López, Javier, Villa Martin, Montserrat, Correia, Carlos, Pascal, Sandrine, Blanco, Leonardo, Vola, Pascal, Epinat, Benoit, Peroux, Celine, Vigan, Arthur, Dohlen, Kjetil, Sauvage, Jean-Francois, Lee, Martin, Carlotti, Alexis, Verinaud, Christophe, Morris, Tim, Myers, Richard, Reeves, Andrew, Swinbank, Mark, Calcines, Ariadna & Larrieu, Marrie (2016). The E-ELT first light spectrograph HARMONI: capabilities and modes. 9908.
• Güver, Tolga, Mazin, Benjamin A., O'Brien, Kieran, Kay, Burak, Alis, Sinan, Yelkenci, F. Korhan, Yesilyaprak, Cahit, Yerli, Sinan K., Erol, Ayse. & Keskin, Onur (2016). A microwave kinetic inductance detector for the DAG telescope. 9915.
• Allen, Jamie R., O'Brien, Kieran, Lynn, James D., Thatte, Niranjan A., Tosh, Ian A. J. & Tacon, Mike (2016). Characterizing the performance of cryogenic lens mounts for the HARMONI spectograph. 9912.
• Kendrew, Sarah, Zieleniewski, Simon, Houghton, Ryan C. W., Thatte, Niranjan, Devriendt, Julien, Tecza, Matthias, Clarke, Fraser, O'Brien, Kieran & Häußler, Boris (2016). Simulated observations of high-redshift galaxies with the HARMONI spectrograph for the European Extremely Large Telescope. 9908.
• Mazin, Benjamin A., Becker, George, France, Kevin, Fraser, Wesley, Howell, D. Andrew, Jones, Tucker, Meeker, Seth, O'Brien, Kieran, Prochaska, Jason X., Siana, Brian, Strader, Matthew, Szypryt, Paul, Tendulkar, Shriharsh P., Treu, Tommaso & Vasisht, Gautam (2015). Science with KRAKENS. 1506.
• Kalamkar, M., Casella, P., O'Brien, K., Uttley, P. & Maccarone, T. (2015). Fast multi-wavelength broad-band and QPO variability in a black hole X-ray binary: accretion flow and/or a jet origin?
• Thatte, Niranjan A., Clarke, Fraser, Bryson, Ian, Schnetler, Hermine, Tecza, Matthias, Bacon, Roland M., Remillieux, Alban, Mediavilla, Evencio, Herreros Linares, José Miguel, Arribas, Santiago, Evans, Christopher J., Lunney, David W., Fusco, Thierry, O'Brien, Kieran, Tosh, Ian A., Ives, Derek J., Finger, Gert, Houghton, Ryan, Davies, Roger L., Lynn, James D., Allen, Jamie R., Zieleniewski, Simon D., Kendrew, Sarah, Ferraro-Wood, Vanessa, Pécontal-Rousset, Arlette, Kosmalski, Johan, Richard, Johan, Jarno, Aurelien, Gallie, Angus M., Montgomery, David M., Henry, David, Zins, Gérard, Freeman, David, García-Lorenzo, Begona, Rodríguez-Ramos, Luis F., Revuelta, Jorge S. C., Hernandez Suarez, Elvio, Bueno-Bueno, Alberto, Gigante-Ripoll, José Vincente, Garcia, Adolfo, Dohlen, Kjetil & Neichel, Benoît. (2014). HARMONI: the first light integral field spectrograph for the E-ELT. 9147.
• Allen, Jamie R., O'Brien, Kieran, Lynn, James D., Thatte, Niranjan A., Bryson, Ian, Clarke, Fraser, Schnetler, Hermine & Tecza, Matthias (2014). Cryogenic testing of components for the HARMONI spectrograph. 9147.
• O'Brien, Kieran, Allen, Jamie R., Lynn, James D., Thatte, Niranjan A., Bryson, Ian, Clarke, Fraser, Schnetler, Hermine & Tecza, Matthias (2014). The spectrograph units for the HARMONI integral field spectrograph. 9147.
• Kendrew, S., Zieleniewski, S., Thatte, N., Devriendt, J., Houghton, R., Fusco, T., Tecza, M., Clarke, F. & O'Brien, Kieran (2014). Integral field spectroscopy of high redshift galaxies with the HARMONI spectrograph on the European Extremely Large Telescope. 9147.
• O'Brien, Kieran, Thatte, Niranjan & Mazin, Benjamin (2014). KIDSpec: an MKID based medium resolution integral field spectrograph. 9147.
• Plant, D. S., O'Brien, K. & Fender, R. P. (2014). Simultaneous independent measurements of a truncated inner accretion disc in the low/hard state of GX 399$-$4. 1411.
• Clarke, Fraser, Thatte, Niranjan, Tecza, Matthias, O'Brien, Kieran, Houghton, Ryan, Tiee, Dan, Fletcher, Leigh, Irwin, Pat, Verma, Aprajita, Dekany, Richard, Rick, Burruss, Roberts, Jenny & Fini, Luca (2013). High resolution in three dimensions with SWIFT and PALM3K.
• Mazin, Benjamin A., O'Brien, K., Bumble, B., Strader, M., Meeker, S., Stoughton, C., Marsden, D., Walter, A., Szypyrt, P. & Ulbricht, G. (2013). Preliminary Results from the Array Camera for Optical to Near-IR Spectrophotometry (ARCONS). 221.
• Marsden, Danica, Mazin, Benjamin A., Bumble, Bruce, Meeker, Seth, O'Brien, Kieran, McHugh, Sean, Strader, Matthew & Langman, Eric (2012). Optical lumped element microwave kinetic inductance detectors. 8453.
• Mazin, Benjamin A., Marsden, Danica & O'Brien, Kieran (2012). SuperMOS: a new class of low resolution multiobject spectrographs. 8446.
• O'Brien, Kieran, Mazin, Ben, McHugh, Sean, Meeker, Seth, Marsden, Danica & Bumble, Bruce (2012). ARCONS: a 1024 pixel superconducting integral field spectrograph. 8446.
• O'Brien, Kieran, Mazin, Ben, McHugh, Sean, Meeker, Seth, Bumble, Bruce, Hanisch, Robert & Seaman, Rob (2012). ARCONS: a Highly Multiplexed Superconducting UV-to-Near-IR Camera. 285: 385-388.
• Meeker, Seth, Mazin, B. A., O'Brien, K., McHugh, S., Bumble, B., Langman, E. & Navaroli, M. (2012). First Optical Observations with Microwave Kinetic Inductance Detectors. 219.
• Casella, Piergiorgio, Maccarone, Thomas J. & O'Brien, Kieran (2011). Fast multiwavelength variability from jets in X-ray binaries. 1104.
• Mazin, Benjamin A., O'Brien, Kieran, McHugh, Sean, Bumble, Bruce, Moore, David, Golwala, Sunil & Zmuidzinas, Jonas (2010). ARCHONS: a highly multiplexed superconducting optical to near-IR camera. 7735.
• Britt, Christopher T., Hynes, R. I., Mikles, V., Robinson, E. & O'Brien, K. (2010). Echo-mapping of Scorpius X-1. 11: 727.
• Cornelisse, R., Casares, J., Steeghs, D., Charles, P., Barnes, A., Hynes, R., O'Brien, K. & Muñoz-Darias, T. (2010). The Bowen Survey; detecting donor star signatures in low mass X-ray binaries.
• Casella, Piergiorgio, Maccarone, T., O'Brien, K., Fender, R., Russell, D., van der Klis, M., Pe'er, A., Maitra, D., Altamirano, D., Belloni, T., Kanbach, G., Klein-Wolt, M., Mason, E., Migliari, S., Soleri, P., Stefanescu, A., Wiersema, K. & Wijnands, R. (2010). Fast Multiwavelength Variability from Jets in X-ray Binaries, a New Powerful Tool. 11: 734.
• Munoz-Darias, T., Martinez-Pais, I. G., Casares, J., O'Brien, K., Cornelisse, R., Dhillon, V. S., March, T. R., Steeghs, D., Charle, P. A. & Still, M. (2010). Mapping LMXBs with reprocessed X-ray bursts.
• Casella, P., Maccarone, T. & O'Brien, K. (2010). Fast multiwavelength variability from jets in X-ray binaries.
• Shahbaz, T., Fender, R. P., Watson, C. A. & O'Brien, K. (2009). Polarimetric signatures of infrared jets in X-ray binaries. 36: CD355-CD357.
• Nelemans, G., Wood, M., Groot, P., Anderson, S., Belczynski, K., Benacquista, M., Charles, P., Cumming, A., Deloye, C., Jonker, P., Kalogera, V., Knigge, C., Marsh, T., Motl, P., Napiwotzki, R., O'Brien, K., Phinney, E.S., Ramsay, G., Shahbaz, T., Solheim, J.-E., Steeghs, D., van der Sluys, M., Verbunt, F., Warner, B., Werner, K., Wu, K. & Yungelson, L.R. (2009). The astrophysics of ultra-compact binaries. 2010.
• Foellmi, C., Dall, T., Pritchard, J., Allende Prieto, C., Bruntt, H., Amado, P. J., Arentoft, T., Baes, M., Depagne, E., Fernandez, M., Ivanov, V. D., Koesterke, L., Monaco, L., O'Brien, K., Sarro, L. M., Saviane, I., Scharwaechter, J., Schmidtobreick, L., Schütz, O., Seifahrt, A., Selman, F., Stefanon, M., Sterzik, M. & Osuna, P. (2008). The Variable Star One-shot Project, and its little child: Wikimbad. 15.
• Muñoz-Darias, T., Martínez-Pais, I. G., Casares, J., Cornelisse, R., Dhillon, V. S., Marsh, T. R., Steeghs, D., O'Brien, K., Charles, P. A., Still, M., Ryan, Oliver & Shearer, Andrew (2008). Bowen blend echo-tomography of low mass X-ray binaries. 984: 15-22.
• Muñoz-Darias, T., Martínee-Pails, I. G., Casares, J., Cornelisse, R., Dhillon, V. S., Marsh, T. R., Steeghs, D., O'Brien, K., Charles, P. A., Still, M., Wachter, Stefanie, Gelino, Dawn & Gelino, Christopher R. (2008). Bowen Blend Echo-Tomography of Sco X-l and V801 Ara. 1010: 207-209.
• Muñoz-Darias, Teo, Martinez-Pais, Ignacio G., Casares, Jorge, Dhillon, Vik, Marsh, Tom, Steeghs, Danny, O'Brien, Kieran, Charles, Phil, Still, Martin & Cornelisse, Remon (2008). Bowen Blend Echo-tomography of Neutron Star LMXBs. 37: 2138.
• O'Brien, Kieran, Leahy, Denis A. & Hobill, David W. (2008). Fast Spectroscopy and Imaging with the FORS2 HIT Mode. 351: 187.
• Dhillon, V. S., Marsh, T. R., Copperwheat, C., Bezawada, N., Ives, Derek, Vick, Andy, O'Brien, K., Ryan, Oliver & Shearer, Andrew (2008). ULTRASPEC: High-speed spectroscopy with zero readout noise. 984: 132-139.
• Mason, Elena, Israel, Gian Luca, O'Brien, Kieran, Ryan, Oliver & Shearer, Andrew (2008). FORS2 HIT Mode: Phase Resolved Spectroscopy of RXJ0806.3+1527. 984: 278-281.
• Walsh, J. R., Kuntschner, H., Jehin, E., Kaufer, A., O'Brien, K., Riquelme, M., Smette, A. & Kerber, Florian (2008). Modelling the Fringing of the FORS2 CCD. 63.
• Shahbaz, T., Fender, R. P., Watson, C. A., O'Brien, K., Wachter, Stefanie, Gelino, Dawn & Gelino, Christopher R. (2008). Polarimetric Signatures of Infrared Jets in X-ray Binaries. 1010: 100-102.
• Freudling, W., Møller, P., Patat, F., Moehler, S., Romaniello, M., Jehin, E., O'Brien, K., Izzo, C., Pompei, E. & Kerber, Florian (2008). Photometry with FORS. 35.
• Schmidtobreick, L., Bagnulo, S., Jehin, E., Marconi, G., O'Brien, K., Pompei, E., Saviane, I. & Kerber, Florian (2008). IOT Overview: Optical Multi-Object Spectrographs. 75.
• Cornelisse, Remon, Casares, Jorge, Muñoz-Darias, Teo, Steeghs, Danny, Charles, Phil, Hynes, Rob, O'Brien, Kieran, Barnes, Andrew, Wachter, Stefanie, Gelino, Dawn & Gelino, Christopher R. (2008). An Overview of the Bowen Survey: Detecting Donor Star Signatures in Low Mass X-ray Binaries. 1010: 148-152.
• Hynes, Robert I., Robinson, Edward L., Bayless, Amanda, O'Brien, Kieran, Wachter, Stefanie, Gelino, Dawn & Gelino, Christopher R. (2008). Echo Tomography of Cygnus X-2. 1010: 198-200.
• Freudling, W., Romaniello, M., Patat, F., Møller, P., Jehin, E. & O'Brien, K. (2007). Photometry with FORS at the ESO VLT. 364: 113.
• Skidmore, W., Horne, K., Pearson, K., Gomer, R., O'Brien, K., Oke, B. & Sion, E. (2004). Rapid Keck Spectroscopy of Cataclysmic Variables. 20: 155-157.
• Casares, J., Steeghs, D., Hynes, R. I., Charles, P. A., Cornelisse, R., O'Brien, K. & Sion, E. (2004). Bowen Fluorescence from Companion Stars in X-ray Binaries. 20: 21-22.
• Hynes, R. I., Haswell, C. A., Robinson, E. L, Horne, K., O'Brien, K., Charles, P. A., King, A. R., Rolfe, D. J. & Sion, E. (2004). Disentangling X-ray Reprocessing Sites in EXO 0748-676. 20: 12-13.
• Skidmore, W., Gomer, R., Horne, K., O'Brien, K., Oke, B., Pearson, K. J. & Cropper, Mark (2004). High Speed Keck Spectroscopy of Flickering in AM Her. 315: 163.
• Hynes, R. I., Steeghs, D., Casares, J., Charles, P. A. & O'Brien, Kieran (2003). Dynamical Evidence for a Black Hole in GX339-4. 7: 615.
• Hynes, R. I., Haswell, C. A., Chaty, S., Cui, W., Shrader, C. R., O'Brien, K., Horne, K., Fuchs, Y. & Rodriguez, J. (2003). X-ray/UV correlations in XTE J1118+480: disc, jet, or something else? 35.
• Skidmore, W., Pearson, K. J., O'Brien, K., Horne, K., Gomer, R., Beuermann, K. & Reinsch, K. (2002). Fireballs and oscillations in AE Aqr. 261: 169.
• O'Brien, K., Horne, K., Steeghs, D. & Cuypers, J. (2001). Echoes in X-ray Binaries: Mapping the Accretion Flow. 573: 416.
• O'Brien, Kieran (2001). Rapid optical spectroscopy of X-ray binaries with Keck II.
• Still, M., O'Brien, K., Horne, K., Boroson, B., Vrtilek, S., Titarchuk, L., Quaintrell, H. & Fiedler, H. (2000). Atmospheric reflection during the anomalous low-state of Hercules X-1.
• O'Brien, K. & Horne, K. (2000). Correlated X-ray and optical variability in X-ray Binaries.
• Vrtilek, S. D., Boroson, B., Still, M., Fiedler, H., Quaintrell, H. & O'Brien, K. (1999). Yet Another Multi wavelength Campaign on Hercules X-1/HZ Herculis. 194: 905.
• Still, M. D., O'Brien, K. & Horne, K. (1998). Echo-sounding the accretion disks of X-ray binaries. 193: 1405.
• Still, Martin, O'Brien, Kieran & Horne, Keith (1998). An Observatory for Mapping Stellar Accretion Discs.
• Hynes, R. L., Haswell, C. A., Fender, R. P., Shrader, C. R., Chen, W., Horne, K., Harlaftis, E. T., O'Brien, K., Hellier, C., Kemp, J., Kuulkers, E. & Woodward, C. (1998). The 1996 Outburst of GRO J1655-40. 137: 509.
• Hynes, R. I., Haswell, C. A., Shrader, C. R., Chen, W., Horne, K., Harlaftis, E. T., O'Brien, K., Hellier, C., Fender, R. P., Kuulkers, E. & Woodward, C. (1998). The 1996 Outburst of GRO J1655-40: The Challenge of Interpreting the Multiwavelength Spectra. 137: 53.