GRB 190331B: Swift observation summary

Mission:	Swift/BAT
GRB RA:	326.237°
GRB Dec:	-54.544°
GRB Err:	4.0 arcmin
T0:	2019-03-31 03:58:42 UT
Galactic:	340.75° -46.55°
Galactic N_H:	1.92× 10²⁰ cm^-2
Galactic E(B-V):	0.02037427

Sun distance:	68.57°
Sun angle:	2.87 [hr] (West of Sun)
Moon distance:	36.88°
Visibility of this field.

Data analysed so far:

ObsID: 00020885001 with 2.0 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 3 sources have been found in the XRT data. 1 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift/BAT pos	Exposure	Notes
1 [details]	21h 44m 53.71s326.22381°	-54° 28′ 18.2″-54.47172°	3.7′′	Good	4.4′	9.8 ks
Mean XRT rate: 1.04 (±0.12) ×10^-2 ct s^-1 Peak XRT rate: 1.24 (±0.30) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.07 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.0 (+0.4, -0.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.5 (±0.8) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.02 [What is this?]
2 [details]	21h 45m 08.22s326.28426°	-54° 42′ 55.3″-54.71535°	10.6′′	Good	10.4′	7.0 ks	Matches known X-ray source: 1RXS J214509.7-544256 (from ROSAT/RASSFSC), 12.9″ away. Matches SIMBAD source: RAVE J214508.9-544256, 5.5″ away.
Mean XRT rate: 7.2 (+1.4, -1.3) ×10^-3 ct s^-1 Peak XRT rate: 1.1 (+0.4, -0.3) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.06 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.40 (+0.28, -0.26) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.2 (+0.8, -0.6) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.2 [What is this?]
3 [details]	21h 44m 59.45s326.24771°	-54° 43′ 31.9″-54.72552°	8.4′′	Good	10.9′	7.0 ks
Mean XRT rate: 2.3 (+0.9, -0.8) ×10^-3 ct s^-1 Peak XRT rate: 2.3 (+0.9, -0.8) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.12 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 7.2 (+3.0, -2.4) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 7.2 (+3.0, -2.4) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the 1SXPS documentation.
^* The position was enhanced using astrometry derived from the Swift UVOT.
^† The position was astrometrically corrected using the XRT sources and the 2MASS catalogue.

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Exposure map

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FITS exposure map.