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SVOM_FIELD00008

SVOM

8

/SVOM

sb25032902: Swift observation summary

This is a confirmed GRB (GRB 250329B), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019667 for updated analysis

Data analysed so far:

• ObsID: 00019667001 with 1.1 ks exposure.

About tiled field analysis.

So far 1 fields have been scheduled for observations. Data are available and processed for 1 of these.

• 19667 — 1.1 ks of cleaned data taken between 2025-03-29 14:07:39 and 2025-03-29 14:31:50

Details of afterglow candidates

1 sources were found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Rank3	Dist from SVOM/ECLAIRs pos	Exposure	Notes	Vizier
1 [details]	13h 50m 40.61s207.66921°	+52° 49′ 24.3″52.82343°	3.3′′ *	Good	2 (O)	3.7′	1.1 ks	The source is 3.7-σ above the RASS limit.
Mean XRT rate: 8.3 (±1.0) ×10-2 ct s-1 Peak XRT rate: 0.101 (±0.023) ct s-1 RASS PSPC 3-σ upper limit: 0.02 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.122 (±0.015) ct s-1 Peak XRT rate converted to PSPC: 0.15 (±0.03) ct s-1 Mean XRT flux: 2.15 (±0.26) ×10-12 erg cm-1s-1 Peak XRT flux: 2.6 (±0.6) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the LSXPS documentation.
³ T=Transient Source, O=Outbursting known source, U=Uncatalogued X-ray source, K=Known X-ray source.
^* 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 1 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Rank3	Dist from SVOM/ECLAIRs pos	Exposure	Notes	Vizier
1 [details]	13h 50m 40.61s207.66921°	+52° 49′ 24.3″52.82343°	3.3′′ *	Good	2 (O)	3.7′	1.1 ks	The source is 3.7-σ above the RASS limit.
Mean XRT rate: 8.3 (±1.0) ×10-2 ct s-1 Peak XRT rate: 0.101 (±0.023) ct s-1 RASS PSPC 3-σ upper limit: 0.02 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.122 (±0.015) ct s-1 Peak XRT rate converted to PSPC: 0.15 (±0.03) ct s-1 Mean XRT flux: 2.15 (±0.26) ×10-12 erg cm-1s-1 Peak XRT flux: 2.6 (±0.6) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the LSXPS documentation.
³ T=Transient Source, O=Outbursting known source, U=Uncatalogued X-ray source, K=Known X-ray source.
^* 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.

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Exposure map

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FITS exposure map.