2019•Data Archiving and Networked Services (DANS)Open access

New Galactic Center X-ray Transient Outburst Detected by Swift: SWIFT J174448.4-290729

Mark Reynolds, Nathalie Degenaar, Rudy A. D. Wijnands, Jon Miller, J. A. Kennea

Abstract

We report on our ongoing Swift monitoring observations of the Galactic center (Degenaar et al. 2015). In the latest Swift observation (obsid: 00095329087), a transient X-ray source is detected in a 0.8 ks observation on MJD 58675.19653 (t_start: 190711 @04:42UT) at a position of RA (J2000): 17h 44m 48.4s (266.20167) Dec (J2000): -29° 07? 28.8?? (-29.124663) 90% Error radius: 2.2?? This source lies approximately 13.4' southwest of Sgr A*. Extracting a spectrum from a circular region (r=18") centered on this source and background from an annular region 28"-37" from the source position, we measure a net count rate of 0.19+/-0.05 ct/s.

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Key concepts: Swift, Astrophysics, Physics, Galactic Center, RADIUS, Position (finance), Center (category theory), Transient (computer programming)