GRB 200205A: MAXI/GSC detection
Abstract
The MAXI/GSC nova alert system triggered a bright uncatalogued X-ray transient source at UT 2020-02-05T06:54. Assuming that the source flux was constant over the transit, we obtain the source position at (R.A., Dec) = (130.230 deg, -35.413 deg) = (08 40 55, -35 24 46) (J2000) with a 90% C.L. statistical error of 0.17 deg and an additional systematic uncertainty of 0.1 deg (90% containment radius). This position is consistent with that of GRB 200205A triggered by Swift (GCN#26982) on 2020-02-05T06:35. The X-ray flux in 4.0-10.0 keV energy band rapidly incrased, 72 mCrab (2020-02-05T06:54) to 262 mCrab (2020-02-05T07:16). In the next transit at 2020-02-05T08:27, the source was detected only in the 2.0-4.0 keV energy band with the flux of 66 +- 18 mCrab. There was no significant excess flux in the previous transit at UT 05:43 and in the next transit at 08:49 UT with an upper limit of 20 mCrab for each.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- February 2020
- Bibcode:
- 2020GCN.26987....1N