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A black widow population dissection through HiPERCAM multi-band light curve modelling
D. Mata Sánchez, M. R. Kennedy, C. J. Clark +7
Black widows are extreme millisecond pulsar binaries where the pulsar wind ablates their low-mass companion stars. Their optical light curves vary periodically due to the high irra…
A rapid optical and X-ray timing study of the neutron star X-ray binary Swift J1858.6-0814
T. Shahbaz, J. A. Paice, K. M. Rajwade +8
We present a rapid timing analysis of optical (HiPERCAM and ULTRACAM) and X-ray (NICER) observations of the X-ray transient Swift J1858.6-0814 during 2018 and 2019. The optical lig…
The TRAPUM L-band survey for pulsars in Fermi-LAT gamma-ray sources
C. J. Clark, R. P. Breton, E. D. Barr +35
More than 100 millisecond pulsars (MSPs) have been discovered in radio observations of gamma-ray sources detected by the Fermi Large Area Telescope (LAT), but hundreds of pulsar-li…
A tentative 114-minute orbital period challenges the ultra-compact nature of the X-ray binary 4U 1812-12
M. Armas Padilla, P. Rodríguez-Gil, T. Muñoz-Darias +7
We present a detailed time-resolved photometric study of the ultra-compact X-ray binary candidate 4U 1812-12. The multicolor light curves obtained with HiPERCAM on the 10.4-m Gran…
A 62-minute orbital period black widow binary in a wide hierarchical triple
Kevin B. Burdge, Thomas R. Marsh, Jim Fuller +30
Over a dozen millisecond pulsars are ablating low-mass companions in close binary systems. In the original "black widow", the 8-hour orbital period eclipsing pulsar PSR J1959+2048…
X-ray observation of the Roche-lobe filling white dwarf plus hot subdwarf system ZTF J213056.71+442046.5
S. Mereghetti, N. La Palombara, T. Kupfer +9
ZTF J213056.71+442046.5 is the prototype of a small class of recently discovered compact binaries composed of a white dwarf and a hot subdwarf that fills its Roche-lobe. Its orbita…