GRB 250127A: Swift observation summary

Mission:	SVOM/ECLAIRs
GRB RA:	169.590°
GRB Dec:	+3.346°
GRB Err:	4.8 arcmin
T0:	2025-01-27 05:04:46 UT
Galactic:	255.81° +57.44°
Galactic N_H:	4.25× 10²⁰ cm^-2
Galactic E(B-V):	0.04929455

Sun distance:	138.02°
Sun angle:	9.33 [hr](West of Sun)
Moon distance:	108.74°
Visibility of this field.

Data analysed so far:

ObsID: 00021757001 with 2.9 ks exposure.

About ToO analysis.

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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 SVOM/ECLAIRs pos	Exposure	Notes
1 [details]	11h 18m 34.43s169.64344°	+03° 32′ 06.5″3.53515°	5.7′′	Good	11.8′	1.6 ks	Matches known X-ray source: 2SXPS J111834.2+033205 (from 2SXPS), 5.3″ away. Matches SIMBAD source: 2MASS J11183434+0332066, 3.8″ away.
Mean XRT rate: 6.8 (+3.3, -2.5) ×10^-3 ct s^-1 Peak XRT rate: 6.8 (+3.3, -2.5) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.5 (+0.8, -0.6) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.5 (+0.8, -0.6) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	11h 18m 30.76s169.62816°	+03° 21′ 06.4″3.35179°	8.6′′	Reasonable	2.3′	2.9 ks
Mean XRT rate: 2.9 (+1.5, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 2.9 (+1.5, -1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.3 (+1.7, -1.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.3 (+1.7, -1.3) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
3 [details]	11h 17m 52.22s169.46760°	+03° 23′ 38.3″3.39396°	6.8′′	Good	7.9′	2.9 ks
Mean XRT rate: 8.2 (±2.3) ×10^-3 ct s^-1 Peak XRT rate: 8.2 (±2.3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.5 (±1.0) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.5 (±1.0) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Enhanced position \| 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.