Search Results - "Potter, Stephen B"

Erratum: “Observational Constraints on Interstellar Grain Alignment” (2007, ApJ, 665, 369) by Andersson, B-G, Potter, Stephen B.

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Towards an Intelligent Observatory by Potter, Stephen B

“…The Intelligent Observatory (IO) refers to the vision of the South African Astronomical Observatory (SAAO) to meet the scientific needs of both the South…”
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A comparison between SALT/SAAO observations and kilonova models for AT 2017gfo: the first electromagnetic counterpart of a gravitational wave transient − GW170817 by Buckley, David A H, Andreoni, Igor, Barway, Sudhanshu, Cooke, Jeff, Crawford, Steven M, Gorbovskoy, Evgeny, Gromadzki, Mariusz, Lipunov, Vladimir, Mao, Jirong, Potter, Stephen B, Pretorius, Magaretha L, Pritchard, Tyler A, Romero-Colmenero, Encarni, Shara, Michael M, Väisänen, Petri, Williams, Ted B

“…Abstract We report on SALT low-resolution optical spectroscopy and optical/IR photometry undertaken with other SAAO telescopes (MASTER-SAAO and IRSF) of the…”
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Rapid Evolution of the White Dwarf Pulsar AR Scorpii by Garnavich, Peter, Potter, Stephen B., Buckley, David A. H., van Dyk, Anke, Egbo, Daniel, Littlefield, Colin, Greiveldinger, Anousha

“…Abstract Analysis of AR Sco optical light curves spanning 9 yr shows a secular change in the relative amplitudes of the beat pulse pairs generated by the two…”
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A 5.3-min-period pulsing white dwarf in a binary detected from radio to X-rays by Pelisoli, Ingrid, Marsh, T. R., Buckley, David A. H., Heywood, I., Potter, Stephen. B., Schwope, Axel, Brink, Jaco, Standke, Annie, Woudt, P. A., Parsons, S. G., Green, M. J., Kepler, S. O., Munday, James, Romero, A. D., Breedt, E., Brown, A. J., Dhillon, V. S., Dyer, M. J., Kerry, P., Littlefair, S. P., Sahman, D. I., Wild, J. F.

“…White dwarf stars are the most common stellar fossils. When in binaries, they make up the dominant form of compact object binary within the Galaxy and can…”
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Time series photopolarimetry and modelling of the white dwarf pulsar in AR Scorpii by Potter, Stephen B, Buckley, David A H

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Polarimetric Evidence of the First White Dwarf Pulsar: The Binary System AR Scorpii by Buckley, David, Potter, Stephen, Meintjes, Pieter, Marsh, Tom, Gänsicke, Boris

“…The binary star AR Scorpii was recently discovered to exhibit high amplitude coherent variability across the electromagnetic spectrum (ultraviolet to radio) at…”
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A reevaluation of the proposed spin-down of the white dwarf pulsar in AR Scorpii by Potter, Stephen B, Buckley, David A H

“…Abstract We present high-speed optical photometric observations, spanning ∼2 yr, of the recently discovered white dwarf pulsar AR Scorpii. The amplitudes of…”
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Large optical modulations during 2018 outburst of MAXI J1820 + 070 reveal evolution of warped accretion disc through X-ray state change by Thomas, Jessymol K, Charles, Philip A, Buckley, David A H, Kotze, Marissa M, Lasota, Jean-Pierre, Potter, Stephen B, Steiner, James F, Paice, John A

“…ABSTRACT The black hole X-ray transient MAXI J1820 + 070  (= ASSASN-18ey) discovered in 2018 March was one of the optically brightest ever seen, which has…”
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TESS observations of the asynchronous polar CD Ind: mapping the changing accretion geometry by Hakala, Pasi, Ramsay, Gavin, Potter, Stephen B, Beardmore, Andrew, Buckley, David A H, Wynn, Graham

“…ABSTRACT We present the results of near continuous TESS optical observations of the asynchronous polar CD Ind (RX J2115−5840). The 27.9 d long light curve,…”
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Probing the non-thermal emission geometry of AR Sco via optical phase-resolved polarimetry by du Plessis, Louis, Venter, Christo, Wadiasingh, Zorawar, Harding, Alice K, Buckley, David A H, Potter, Stephen B, Meintjes, P J

“…ABSTRACT AR Sco is a binary system that contains a white and red dwarf. The rotation rate of the white dwarf (WD) has been observed to slow down, analogous to…”
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Demonstration of Magnetic Field Tomography with Starlight Polarization toward a Diffuse Sightline of the ISM by Panopoulou, Georgia V., Tassis, Konstantinos, Skalidis, Raphael, Blinov, Dmitriy, Liodakis, Ioannis, Pavlidou, Vasiliki, Potter, Stephen B., Ramaprakash, Anamparambu N., Readhead, Anthony C. S., Wehus, Ingunn K.

“…The availability of large data sets with stellar distance and polarization information will enable a tomographic reconstruction of the…”
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Discovery of spin-modulated circular polarization from IGR J17014−4306, the remnant of Nova Scorpii 1437 AD by Potter, Stephen B., Buckley, David A. H.

“…AbstractPolarimetry of IGR J1401-4306, a long-period (12.7 h) eclipsing intermediate polar and remnant of Nova Scorpii 1437 AD, reveals periodic variations of…”
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Unveiling the white dwarf in J191213.72 − 441045.1 through ultraviolet observations by Pelisoli, Ingrid, Sahu, Snehalata, Lyutikov, Maxim, Barkov, Maxim, Gänsicke, Boris T, Brink, Jaco, Buckley, David A H, Potter, Stephen B, Schwope, Axel, Ramírez, S H

“…ABSTRACT J191213.72 − 441045.1 is a binary system composed of a white dwarf and an M-dwarf in a 4.03-h orbit. It shows emission in radio, optical, and X-ray,…”
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Confirmation of two magnetic cataclysmic variables as polars: 1RXS J174320.1−042953 and YY Sex by Rawat, Nikita, Pandey, J C, Joshi, Arti, Potter, Stephen B, Hojaev, Alisher S, De Becker, Michaël, Rao, Srinivas M, Yadava, Umesh

“…ABSTRACT We present our analysis of new and archived observations of two candidate magnetic cataclysmic variables, namely 1RXS J174320.1−042953 and YY Sex…”
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V899 Mon: A Peculiar Eruptive Young Star Close to the End of Its Outburst by Park, Sunkyung, Kóspál, Ágnes, Cruz-Sáenz de Miera, Fernando, Siwak, Michał, Dróżdż, Marek, Ignácz, Bernadett, Jaffe, Daniel T., Könyves-Tóth, Réka, Kriskovics, Levente, Lee, Jae-Joon, Lee, Jeong-Eun, Mace, Gregory N., Ogłoza, Waldemar, Pál, András, Potter, Stephen B., Szabó, Zsófia Marianna, Sefako, Ramotholo, Worters, Hannah L.

“…Abstract The eruptive young star V899 Mon shows characteristics of both FUors and EXors. It reached a peak brightness in 2010, then briefly faded in 2011,…”
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Optical spectroscopic and photometric classification of the X-ray transient EP240309a (EP J115415.8−501810) as an intermediate polar by Potter, Stephen B, Buckley, David A H, Scaringi, S, Monageng, I M, Egbo, Okwudili D, Charles, Philip A, Erasmus, N, van Gend, Carel, Loubser, Egan, Titus, Keegan, Rosie, Kathryn, Gajjar, Hitesh, Worters, H L, Chandra, Sunil, Julie, R P M, Hlakola, Moloko

“…ABSTRACT We report on optical follow-up observations of an X-ray source initially detected by the Einstein Probe mission. Our investigations categorize the…”
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Synchronous X-ray/optical quasi-periodic oscillations from the black hole LMXB MAXI J1820+070 by Thomas, Jessymol K, Buckley, David A H, Charles, Philip A, Paice, John A, Potter, Stephen B, Steiner, James F, Lasota, Jean-Pierre, Gandhi, P, Tao, Lian, Ma, Xiang, Yang, Yi-Jung, Tuo, Youli, Zhang, Shuang-Nan

“…ABSTRACT We present high-speed optical photometry from SAAO and SALT on the black hole LMXB MAXI J1820+070  (ASSASN-18ey), some of it simultaneous with…”
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Possible detection of two giant extrasolar planets orbiting the eclipsing polar UZ Fornacis by Potter, Stephen B., Romero-Colmenero, Encarni, Ramsay, Gavin, Crawford, Steven, Gulbis, Amanda, Barway, Sudhanshu, Zietsman, Ewald, Kotze, Marissa, Buckley, David A. H., O'Donoghue, Darragh, Siegmund, O. H. W., McPhate, J., Welsh, B. Y., Vallerga, John

“…We present new high-speed, multi-observatory, multi-instrument photometry of the eclipsing polar UZ For in order to measure precise mid-eclipse times with the…”
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Polarized QPOs from the INTEGRAL polar IGRJ14536-5522 (=Swift J1453.4-5524) by Potter, Stephen B., Buckley, David A. H., O'Donoghue, Darragh, Romero-Colmenero, Encarni, O'Connor, James, Fourie, Piet, Evans, Geoff, Sass, Craig, Crause, Lisa, Still, Martin, Butters, O. W., Norton, A. J., Mukai, Koji

“…We report optical spectroscopy and high-speed photometry and polarimetry of the INTEGRAL source IGRJ14536-5522 (=Swift J1453.4-5524). The photometry,…”
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