GRB 250211A: Swift observation summary

Mission:	SVOM/ECLAIRs
GRB RA:	117.004°
GRB Dec:	-52.371°
GRB Err:	5.7 arcmin
T0:	2025-02-11 17:50:32 UT
Galactic:	265.48° -13.20°
Galactic N_H:	1.36× 10²¹ cm^-2
Galactic E(B-V):	0.2587002

Sun distance:	109.40°
Sun angle:	10.11 [hr](East of Sun)
Moon distance:	74.72°
Visibility of this field.

Data analysed so far:

ObsID: 00021776001 with 3.4 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 4 sources have been found in the XRT data. 3 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from SVOM/ECLAIRs pos	Exposure	Notes
1 [details]	07h 47m 28.81s116.87004°	-52° 31′ 20.1″-52.52224°	7.7′′	Good	10.3′	3.4 ks	Matches known X-ray source: 1RXS J074729.2-523121 (from ROSAT/RASSFSC), 3.8″ away. Matches SIMBAD source: 1RXS J074729.2-523121, 3.8″ away.
Mean XRT rate: 6.0 (+2.0, -1.6) ×10^-3 ct s^-1 Peak XRT rate: 6.0 (+2.0, -1.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.2 (+0.4, -0.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.2 (+0.4, -0.3) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-13.20°
2 [details]	07h 48m 13.08s117.05449°	-52° 17′ 31.0″-52.29196°	7.1′′	Good	5.1′	3.4 ks
Mean XRT rate: 2.48 (+1.28, -0.97) ×10^-3 ct s^-1 Peak XRT rate: 2.48 (+1.28, -0.97) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.2 (+2.7, -2.0) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.2 (+2.7, -2.0) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-13.20°
3 [details]	07h 48m 48.70s117.20293°	-52° 16′ 19.2″-52.27201°	5.4′′	Good	9.4′	3.4 ks	Matches known X-ray source: 1RXS J074849.1-521611 (from ROSAT/RASSFSC), 8.3″ away. Matches SIMBAD source: 1RXS J074849.1-521611, 8.3″ away.
Mean XRT rate: 6.4 (+2.0, -1.7) ×10^-3 ct s^-1 Peak XRT rate: 6.4 (+2.0, -1.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.2 (+0.7, -0.6) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.2 (+0.7, -0.6) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-13.20°
4 [details]	07h 46m 56.85s116.73685°	-52° 20′ 48.1″-52.34669°	4.7′′	Good	9.9′	3.4 ks	This source may be affected by optical loading Matches SIMBAD source: V* V458 Car, 2.2″ away.
Mean XRT rate: 4.2 (+1.8, -1.4) ×10^-3 ct s^-1 Peak XRT rate: 4.2 (+1.8, -1.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-13.20°

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.