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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.

1 fields were processed but not included in the analysis. This is because, after standard processing and the removal of times contaminated by light reflected off the bright Earth, there was too little data (<100 s) for source detection to be performed.

Details of afterglow candidates

1 sources were found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Rank3	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	4 (K)	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.