| Abstract |
INTEGRAL observations of SRGA J043520.9+552226In the spring of this year SRG/ART-XC detected a new hard X-ray transient SRGA J043520.9+552226 associated with a slowly varying optical transient AT2019wey. A week days ago SRG observed this source for the second time, in the course of its all-sky survey, and found it to be even brighter, at a flux of ~5e-10 ergs/cm2/s.During the April-September this source was extensively monitored by different X-ray (Swift/NICER/NuSTAR/Chandra) observatories along with optical and radio observations. There are different clues that indicate that the SRGA J043520.9+552226 is an accreting XB in our Galaxy.Three NuSTAR observations, made after our discovery, shown that the source spectrum is hard, with powerlaw slope of 1.8-2 and no obvious cut-off at high energies. Two of these observations happened in the late August, the 30-60 keV flux was about 40 mCrab.We are planning to utilize a break from all-sky survey on Oct 5, caused by a correction of the SRG orbit, in order to perform anobservation of this source. Currently we have scheduled this observation to happen on 2020-10-05 20:40:00 - 2020-10-06 00:00:00 UTC, but we will try to expand it. We are asking INTEGRAL to join this observation, pursuing two main tasks: first we would like to obtain a set of simultaneous observations with ART-XC, JEM-X and IBIS in order to perform cross-calibration, second we would like to use INTEGRAL data to measure the spectral shape at high energies (above 80 keV). |
| Publications |
- Peculiar X-ray transient SRGA J043520.9+552226/AT2019wey discovered with SRG/ART-XC - Mereminskiy, I. A., Dodin, A. V.,Lutovinov, A. A.,Semena, A. N.,Arefiev, V. A.,Atapin, K. E.,Belinski, A. A.,Burenin, R. A.,Burlak, M. V.,Es^ich, M. V.,Fedotieva, A. A.,Gilfanov, M. R.,Ikonnikova, N. P.,Krivonos, R. A.,Lapshov, I. Yu.,Lyapin, A. R.,Medvedev, P. S.,Molkov, S. V.,Postnov, K. A.,Pshirkov, M. S.,Sazonov, S. Yu.,Shakura, N. I.,Shtykovsky, A. E.,Sunyaev, R. A.,Tatarnikov, A. M.,Tkachenko, A. Yu.,Zheltoukhov, S. G. (2022-05-01) http://ui.adsabs.harvard.edu/#abs/2022A&A...661A..32M
- 26Al gamma rays from the Galaxy with INTEGRAL/SPI - Pleintinger, Moritz M. M., Diehl, Roland,Siegert, Thomas,Greiner, Jochen,Krause, Martin G. H. (2023-04-01) http://ui.adsabs.harvard.edu/#abs/2023A&A...672A..53P
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