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SRGe2149+6736 -- the new candidate to AM~Her type variables discovered by eROSITA telescope on "Spectrum--Roentgen--Gamma" orbital observatory
I. F. Bikmaev, A. I. Kolbin, V. V. Shimansky +18
We present the results of the optical identification, classification, as well as analysis of photometric and spectral observations of the X-ray transient SRGe2149+6736 detected by…
New Active Galactic Nuclei Detected by the ART-XC and eROSITA Telescopes Onboard the SRG Observatory during an All-Sky X-ray Survey
Grigory Uskov, Igor Zaznobin, Sergey Sazonov +9
We present the results of our identification of 17 X-ray sources detected in the 4-12 keV energy range by the Mikhail Pavlinsky ART-XC telescope during the first year of the SRG al…
Long-Exposure NuSTAR Constraints on Decaying Dark Matter in the Galactic Halo
Brandon M. Roach, Steven Rossland, Kenny C. Y. Ng +6
We present two complementary NuSTAR x-ray searches for keV-scale dark matter decaying to mono-energetic photons in the Milky Way halo. In the first, we utilize the known intensity…
StrayCats II: An Updated Catalog of NuSTAR Stray Light Observations
R. M. Ludlam, B. W. Grefenstette, M. C. Brumback +8
We present an updated catalog of StrayCats (a catalog of NuSTAR stray light observations of X-ray sources) that includes nearly 18 additional months of observations. StrayCats v2 h…
Extending the baseline for SMC X-1's spin and orbital behavior with NuSTAR stray light
McKinley C. Brumback, B. W. Grefenstette, D. J. K. Buisson +10
StrayCats, the catalog of NuSTAR stray light observations, contains data from bright X-ray sources that fall within crowded source regions. These observations offer unique addition…
Classifying IGR J18007-4146 as an intermediate polar using XMM and NuSTAR
Benjamin M. Coughenour, John A. Tomsick, Aarran W. Shaw +5
Many new and unidentified Galactic sources have recently been revealed by ongoing hard X-ray surveys. A significant fraction of these have been shown to be the type of accreting wh…