INTEGRAL detection of hard X-ray emission from AT 2019wey
ATel #16418; Pietro Ubertini, Mariateresa Fiocchi, Angela Bazzano (INAF-IAPS, Italy), Carlo Ferrigno, Enrico Bozzo, Volodymyr Savchenko (ISDC-CH), Lorenzo Ducci (IAAT, Germany) on behalf of the Perseus Arm Team
on 25 Jan 2024; 14:12 UT
Credential Certification: mariateresa fiocchi (mariateresa.fiocchi@inaf.it)
Subjects: X-ray, Gamma Ray, Binary, Black Hole, Transient, Variables
During the public deep Galactic anticentre survey observations (2024-01-23 17:41 - 2024-01-25 00:21), INTEGRAL instruments detected the low-mass X-ray binary AT 2019wey (e.g. ATeL #13571) in a hard X-ray state. The 30-150 keV IBIS/ISGRI spectrum can be described by a power-law with index 2.38±0.11 and 20-100 keV flux of 1.13±0.06 × 10-9 erg/s/cm2 (about 60 mCrab). An exponential roll-over is not statistically required. The JEM-X monitor detects the source at about 11 mCrab in the 3-20 keV band, no spectral information can be reliable derived from near real time data.
The last report on X-ray activity from this source is from August 2023 (ATel #16197) when it was in extremely soft state. The MAXI light curve indicate ongoing persistent X-ray activity since its discovery and the flux we measure is similar to what was found in the 2020 observation by INTEGRAL, Swift and SRG/ART-XC (ATel #14100).\\
All products are computed through the MMODA platform and are available at this link upon registration.
Results from the INTEGRAL Perseus Arm are publicly available at: http://gps.iaps.inaf.it.
