GRB 250502A: Swift observation summary

Mission:	SVOM/ECLAIRs
GRB RA:	206.523°
GRB Dec:	-10.759°
GRB Err:	60 arcsec
T0:	2025-05-02 08:46:27 UT
Galactic:	324.03° +49.86°
Galactic N_H:	4.09× 10²⁰ cm^-2
Galactic E(B-V):	0.0633098

Sun distance:	166.62°
Sun angle:	11.14 [hr] (East of Sun)
Moon distance:	103.86°
Visibility of this field.

Data analysed so far:

ObsID: 00021827001 with 4.6 ks exposure.

Source 1 has been manually confirmed as the GRB afterglow; data for this object are now available through the main GRB results area for this GRB.

About ToO analysis.

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Sources found so far

So far 3 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from SVOM/ECLAIRs pos	Exposure
1 [details]	13h 46m 05.75s206.52396°	-10° 45′ 31.6″-10.75879°	4.5′′	Reasonable	3.5′′	4.6 ks
Mean XRT rate: 1.06 (±0.25) ×10^-2 ct s^-1 Peak XRT rate: 1.06 (±0.25) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.6 (±0.6) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.6 (±0.6) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	13h 45m 41.43s206.42263°	-10° 48′ 56.2″-10.81562°	4.3′′	Good	6.8′	4.6 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: undetermined erg cm^-1s^-1 Peak XRT flux: undetermined erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
3 [details]	13h 46m 44.46s206.68526°	-10° 48′ 14.2″-10.80396°	8.6′′	Poor	9.9′	4.6 ks
Mean XRT rate: 3.8 (+1.5, -1.2) ×10^-3 ct s^-1 Peak XRT rate: 3.8 (+1.5, -1.2) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 4.9×10^-3 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.1 (±0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.1 (±0.4) ×10^-13 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.

Image

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FITS image.

Exposure map

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FITS exposure map.