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SVOM_FIELD00006

SVOM

6

/SVOM

sb25032803: Swift observation summary

This is a confirmed GRB (GRB 250328A), the afterglow is source 2 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019661 for updated analysis

Data analysed so far:

• ObsID: 00019661001 with 2.0 ks exposure.

About tiled field analysis.

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

• 19661 — 2.0 ks of cleaned data taken between 2025-03-28 17:48:33 and 2025-03-28 19:26:16

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
2 [details]	14h 23m 50.35s215.95979°	+25° 55′ 56.2″25.93229°	4.3′′ *	Good	2 (O)	3.1′	4.5 ks	The source is fading with 4.9-σ significance.
Mean XRT rate: 2.4 (±0.4) ×10-2 ct s-1 Peak XRT rate: 4.9 (±0.9) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.034 (±0.006) ct s-1 Peak XRT rate converted to PSPC: 0.069 (±0.013) ×10-2 ct s-1 Mean XRT flux: 8.3 (±1.4) ×10-13 erg cm-1s-1 Peak XRT flux: 1.7 (±0.3) ×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. 1 sources match catalogued sources. There are also 1 sources marked as spurious.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Rank3	Dist from SVOM/ECLAIRs pos	Exposure	Notes	Vizier
1 [details]	14h 24m 11.71s216.04879°	+25° 42′ 11.4″25.70316°	2.4′′ *	Good	2 (O)	11.5′	2.0 ks	The source is 3.8-σ above the LSPXS limit. This source is affected by optical loading. Matches SIMBAD source: V* RX Boo, 3.5″ away.
Mean XRT rate: 0.130 (±0.011) ct s-1 Peak XRT rate: 0.18 (±0.04) ct s-1 RASS PSPC 3-σ upper limit: 0.04 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.230 (±0.019) ct s-1 Peak XRT rate converted to PSPC: 0.32 (±0.07) ct s-1 Mean XRT flux: 2.06 (±0.17) ×10-12 erg cm-1s-1 Peak XRT flux: 2.9 (±0.6) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position
2 [details]	14h 23m 50.35s215.95979°	+25° 55′ 56.2″25.93229°	4.3′′ *	Good	2 (O)	3.1′	4.5 ks	The source is fading with 4.9-σ significance.
Mean XRT rate: 2.4 (±0.4) ×10-2 ct s-1 Peak XRT rate: 4.9 (±0.9) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.034 (±0.006) ct s-1 Peak XRT rate converted to PSPC: 0.069 (±0.013) ×10-2 ct s-1 Mean XRT flux: 8.3 (±1.4) ×10-13 erg cm-1s-1 Peak XRT flux: 1.7 (±0.3) ×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.