GRB 251129A: Swift observation summary

Mission:	SVOM/ECLAIRs
GRB RA:	224.326°
GRB Dec:	+79.300°
GRB Err:	30 arcsec
T0:	2025-11-29 02:32:05 UT
Galactic:	116.04° +36.09°
Galactic N_H:	2.69× 10²⁰ cm^-2
Galactic E(B-V):	0.02865806

Sun distance:	101.38°
Sun angle:	1.41 [hr](West of Sun)
Moon distance:	100.81°
Visibility of this field.

Data analysed so far:

ObsID: 00021892001 with 0.7 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.

Probable afterglow details

A source was found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from SVOM/ECLAIRs pos	Exposure	Notes	Vizier
1 [details]	14h 57m 19.54s224.33140°	+79° 17′ 35.7″79.29324°	2.6′′	Good	0.4′	732 s	The source is 4.7-σ above the RASS limit.
Mean XRT rate: 3.13 (±0.15) ct s^-1 Peak XRT rate: 5.3 (±1.1) ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 8.0 (±0.4) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 1.36 (±0.29) ×10^-10 erg cm^-1s^-1 Products: Light curve \| 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 2SXPS 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.

Find an upper limit.

Sources found so far

So far 2 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	Notes
1 [details]	14h 57m 19.54s224.33140°	+79° 17′ 35.7″79.29324°	2.6′′	Good	0.4′	732 s	The source is 4.7-σ above the RASS limit.
Mean XRT rate: 3.13 (±0.15) ct s^-1 Peak XRT rate: 5.3 (±1.1) ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 8.0 (±0.4) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 1.36 (±0.29) ×10^-10 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	14h 59m 16.32s224.81802°	+79° 25′ 04.1″79.41782°	7.0′′	Good	8.9′	732 s
Mean XRT rate: 10 (+5, -4) ×10^-3 ct s^-1 Peak XRT rate: 10 (+5, -4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.2 (+1.8, -1.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.2 (+1.8, -1.4) ×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.