GRB 250521B: Swift observation summary

Mission:	SVOM/ECLAIRs
GRB RA:	200.822°
GRB Dec:	+1.766°
GRB Err:	12.2 arcmin
T0:	2025-05-21 04:19:17 UT
Galactic:	321.02° +63.51°
Galactic N_H:	1.80× 10²⁰ cm^-2
Galactic E(B-V):	0.02686178

Sun distance:	137.60°
Sun angle:	9.53 [hr] (East of Sun)
Moon distance:	139.41°
Visibility of this field.

Data analysed so far:

ObsID: 00021830001 with 2.8 ks exposure.

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Sources found so far

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

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from SVOM/ECLAIRs pos	Exposure	Notes	Vizier
1 [details]	13h 23m 44.94s200.93727°	+01° 54′ 53.3″1.91480°	7.8′′	Reasonable	11.3′	1.4 ks	Matches SIMBAD source: SDSSCGB 35718.1, 1.6″ away.
Mean XRT rate: 8 (+4, -3) ×10^-3 ct s^-1 Peak XRT rate: 8 (+4, -3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.07 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.44 (+1.16, -0.88) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.44 (+1.16, -0.88) ×10^-13 erg cm^-1s^-1 Products: 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.

Image

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FITS image.

Exposure map

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FITS exposure map.