Swift Observations of GRB 150202B

B. Sbarufatti (INAF-OAB/PSU) for the Swift team

1. Introduction

Axelsson and Vianello (GCN Circ. 17385) reported the GRB detection. At 23:59:08.27 UT on February 2, 2015, Fermi-LAT detected emission from GRB 150202B, which was also detected by Fermi-GBM (trigger 444614351/150202999). Table 1 contains the best reported positions from Swift.

Table 2 is a summary of GCN Circulars about this GRB from observatories other than Swift.

2. BAT Observations and Analysis

BAT did not observe this burst.

3. XRT Observations and Analysis

XRT results are not available.

4. UVOT Observations and Analysis

UVOT results are not available.

Figure 1. The BAT light curve is not available.

RA (J2000)	Dec (J2000)	Error	Note	Reference
05h47m49.56s	+58°49'48.4"	4.1"	XRT	GCN Circ. 17405

Table 1. Positions from the Swift instruments.

Band	Authors	GCN Circ.	Subject	Observatory	Notes
Gamma-ray	Axelsson and Vianello	17385	Fermi-LAT detection	Fermi LAT
Gamma-ray	Pelassa	17388	Fermi GBM detection	Fermi GBM	Epeak=253±12 keV T90=167 seconds Fluence=3.15±0.05x10-5erg cm-2 (91st percentile for long GRBs)
Gamma-ray	Hurley et al.	17398	IPN Triangulation	IPN
Gamma-ray	Golenetskii et al.	17422	Konus-Wind observation	Konus-Wind	Fluence=4.56(-0.51,+0.67)x10-5erg cm-2

Table 2. Summary of GCN Circulars from other observatories sorted by band and then circular number.

Table 3. Found no UVOT observations.

February 10, 2015