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Lunar Occultations of Eighteen Stellar Sources from the 2.4-m Thai National Telescope
A. Richichi, O. Tasuya, P. Irawati +3
We report further results from the program of lunar occultation (LO) observations started at the 2.4-m Thai National Telescope (TNT) in 2014. We have recorded LO events of 18 stell…
A large, long-lived structure near the trojan L5 point in the post common-envelope binary SDSS J1021+1744
P. Irawati, A. Richichi, M. C. P. Bours +8
SDSS J1021+1744 is a detached, eclipsing white dwarf / M dwarf binary discovered in the Sloan Digital Sky Survey. Outside the primary eclipse, the light curves of such systems are…
Accretion-induced variability links young stellar objects, white dwarfs, and black holes
S. Scaringi, T. J. Maccarone, E. Koerding +6
The central engines of disc-accreting stellar-mass black holes appear to be scaled down versions of the supermassive black holes that power active galactic nuclei. However, if the…
Broad-band spectrophotometry of the hot Jupiter HAT-P-12b from the near-UV to the near-IR
M. Mallonn, V. Nascimbeni, J. Weingrill +13
The detection of trends or gradients in the transmission spectrum of extrasolar planets is possible with observations at very low spectral resolution. Transit measurements of suffi…
The binary millisecond pulsar PSR J1023+0038 during its accretion state - I. Optical variability
T. Shahbaz, M. Linares, S. P. Nevado +7
We present time-resolved optical photometry of the binary millisecond `redback' pulsar PSR J1023+0038 (=AY Sex) during its low-mass X-ray binary phase. The light curves taken betwe…
Total eclipse of the heart: The AM CVn Gaia14aae / ASSASN-14cn
H. C. Campbell, T. R. Marsh, M. Fraser +82
We report the discovery and characterisation of a deeply eclipsing AM CVn-system, Gaia14aae (= ASSASN-14cn). Gaia14aae was identified independently by the All-Sky Automated Survey…
Phase resolved spectroscopy and Kepler photometry of the ultracompact AM CVn binary SDSS J190817.07+394036.4
T. Kupfer, P. J. Groot, S. Bloemen +8
{\it Kepler} satellite photometry and phase-resolved spectroscopy of the ultracompact AM CVn type binary SDSS J190817.07+394036.4 are presented. The average spectra reveal a variet…
A double white dwarf with a paradoxical origin?
M. C. P. Bours, T. R. Marsh, B. T. Gaensicke +14
We present Hubble Space Telescope UV spectra of the 4.6 h period double white dwarf SDSS J125733.63+542850.5. Combined with Sloan Digital Sky Survey optical data, these reveal that…
Insights into internal effects of common-envelope evolution using the extended Kepler mission
J. J. Hermes, B. T. Gaensicke, A. Bischoff-Kim +14
We present an analysis of the binary and physical parameters of a unique pulsating white dwarf with a main-sequence companion, SDSS J1136+0409, observed for more than 77 d during t…
PHL 1445: An eclipsing cataclysmic variable with a substellar donor near the period minimum
M. J. McAllister, S. P. Littlefair, I. Baraffe +14
We present high-speed, three-colour photometry of the eclipsing dwarf nova PHL 1445, which, with an orbital period of 76.3 min, lies just below the period minimum of ~82 min for ca…
Fourteen new eclipsing white dwarf plus main-sequence binaries from the SDSS and Catalina surveys
S. G. Parsons, C. Agurto-Gangas, B. T. Gaensicke +13
We report on the search for new eclipsing white dwarf plus main-sequence (WDMS) binaries in the light curves of the Catalina surveys. We use a colour selected list of almost 2000 c…
The First Science Results from SPHERE: Disproving the Predicted Brown Dwarf around V471 Tau
A. Hardy, M. R. Schreiber, S. G. Parsons +10
Variations of eclipse arrival times have recently been detected in several post common envelope binaries consisting of a white dwarf and a main sequence companion star. The general…
Direct evidence for an evolving dust cloud from the exoplanet KIC 12557548 b
Jakub J. Bochinski, Carole A. Haswell, Tom R. Marsh +2
We present simultaneous multi-color optical photometry using ULTRACAM of the transiting exoplanet KIC 12557548 b (also known as KIC 1255 b). This reveals, for the first time, the c…
The catalogue of radial velocity variable hot subluminous stars from the MUCHFUSS project
S. Geier, T. Kupfer, U. Heber +13
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims to find sdBs with compact companions like massive white dwarfs, neutron stars or bl…
Learning from FITS: Limitations in use in modern astronomical research
Brian Thomas, Tim Jenness, Frossie Economou +35
The Flexible Image Transport System (FITS) standard has been a great boon to astronomy, allowing observatories, scientists and the public to exchange astronomical information easil…