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Home > SVOM follow up > GRB 250610B

SVOM_FIELD00018

SVOM

18

/SVOM

GRB 250610B: Swift observation summary

This is a confirmed GRB (GRB 250610B), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019863 for updated analysis

Data analysed so far:

• ObsID: 00019863001 with 2.0 ks exposure.
• ObsID: 00019863002 with 2.9 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
1 [details]	13h 20m 43.13s200.17969°	+31° 06′ 17.2″31.10478°	2.7′′ *	Good	2 (O)	4.2′	5.0 ks	The source is fading with 4.1-σ significance. The source is 4.9-σ above the RASS limit.
Mean XRT rate: 5.1 (±0.4) ×10-2 ct s-1 Peak XRT rate: 0.138 (±0.023) ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.086 (±0.006) ct s-1 Peak XRT rate converted to PSPC: 0.23 (±0.04) ct s-1 Mean XRT flux: 1.81 (±0.13) ×10-12 erg cm-1s-1 Peak XRT flux: 4.9 (±0.8) ×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 7 sources have been found in the XRT data. 6 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Rank3	Dist from SVOM/ECLAIRs pos	Exposure	Notes	Vizier
1 [details]	13h 20m 43.13s200.17969°	+31° 06′ 17.2″31.10478°	2.7′′ *	Good	2 (O)	4.2′	5.0 ks	The source is fading with 4.1-σ significance. The source is 4.9-σ above the RASS limit.
Mean XRT rate: 5.1 (±0.4) ×10-2 ct s-1 Peak XRT rate: 0.138 (±0.023) ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.086 (±0.006) ct s-1 Peak XRT rate converted to PSPC: 0.23 (±0.04) ct s-1 Mean XRT flux: 1.81 (±0.13) ×10-12 erg cm-1s-1 Peak XRT flux: 4.9 (±0.8) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position
2 [details]	13h 20m 60.00s200.24999°	+31° 02′ 30.9″31.04191°	4.7′′ *	Good	3 (U)	8.9′	5.0 ks	Matches SIMBAD source: US 604, 0.7″ away.
Mean XRT rate: 7.1 (+1.6, -1.5) ×10-3 ct s-1 Peak XRT rate: 1.08 (±0.29) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.02 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.0128 (+0.0029, -0.0027) ×10-2 ct s-1 Peak XRT rate converted to PSPC: 0.020 (±0.005) ×10-2 ct s-1 Mean XRT flux: 2.8 (±0.6) ×10-13 erg cm-1s-1 Peak XRT flux: 4.2 (±1.1) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position
3 [details]	13h 20m 30.09s200.12536°	+31° 21′ 10.9″31.35303°	5.4′′	Good	4 (K)	11.0′	2.0 ks	Matches SIMBAD source: SDSS J132029.54+312113.6, 7.5″ away. Matches known X-ray source: 1RXS J132030.1+312120 (from ROSAT/RASSFSC), 9.5710641357176″ away.
Mean XRT rate: 1.08 (+0.35, -0.29) ×10-2 ct s-1 Peak XRT rate: 1.08 (+0.35, -0.29) ×10-2 ct s-1 -0.45 σ above the catalogued flux from ROSAT/RASSFSC. RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.046 (+0.015, -0.012) ct s-1 Peak XRT rate converted to PSPC: 0.046 (+0.015, -0.012) ×10-2 ct s-1 Mean XRT flux: 2.2 (+0.7, -0.6) ×10-13 erg cm-1s-1 Peak XRT flux: 2.2 (+0.7, -0.6) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position
4 [details]	13h 20m 22.93s200.09556°	+30° 56′ 16.1″30.93780°	4.6′′ *	Good	4 (K)	14.8′	2.9 ks	Matches SIMBAD source: [SMB88] 1859, 9.2″ away. Matches known X-ray source: 1RXS J132023.5+305608 (from ROSAT/RASSFSC), 4.6264041939907″ away.
Mean XRT rate: 1.47 (+0.31, -0.28) ×10-2 ct s-1 Peak XRT rate: 1.8 (±0.5) ×10-2 ct s-1 0.98 σ below the catalogued flux from ROSAT/RASSFSC. RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.019 (±0.004) ct s-1 Peak XRT rate converted to PSPC: 0.023 (±0.006) ×10-2 ct s-1 Mean XRT flux: 4.5 (+1.0, -0.9) ×10-13 erg cm-1s-1 Peak XRT flux: 5.5 (±1.4) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position
5 [details]	13h 20m 36.07s200.15031°	+30° 54′ 08.7″30.90241°	7.0′′ *	Good	4 (K)	16.4′	0 s	Matches SIMBAD source: PB 3514, 5.8″ away. Matches known X-ray source: 1RXH J132036.0+305414 (from ROSAT/ROSHRI), 6.4598833646629″ away.
Mean XRT rate: undetermined ct s-1 Peak XRT rate: undetermined ct s-1 -0.18 σ above the catalogued flux from ROSAT/ROSHRI. RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (PSPC count-rate) Products: Enhanced position
6 [details]	13h 20m 10.11s200.04214°	+31° 04′ 04.2″31.06785°	6.2′′	Reasonable	3 (U)	9.3′	5.0 ks	Matches SIMBAD source: SDSSCGB 32282.3, 3.4″ away.
Mean XRT rate: 1.5 (+0.9, -0.7) ×10-3 ct s-1 Peak XRT rate: 1.5 (+0.9, -0.7) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.02 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 2.6 (+1.5, -1.1) ×10-3 ct s-1 Peak XRT rate converted to PSPC: 2.6 (+1.5, -1.1) ×10-3 ct s-1 Mean XRT flux: 8 (+5, -3) ×10-14 erg cm-1s-1 Peak XRT flux: 8 (+5, -3) ×10-14 erg cm-1s-1 Products: Light curve | Spectrum
7 [details]	13h 20m 36.14s200.15057°	+31° 16′ 19.2″31.27200°	6.6′′	Reasonable	3 (U)	5.9′	5.0 ks	Matches SIMBAD source: LP 323-28, 20.3″ away.
Mean XRT rate: 1.96 (+1.01, -0.76) ×10-3 ct s-1 Peak XRT rate: 1.96 (+1.01, -0.76) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.35 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 2.8 (+1.4, -1.1) ×10-4 ct s-1 Peak XRT rate converted to PSPC: 2.8 (+1.4, -1.1) ×10-4 ct s-1 Mean XRT flux: 2.12 (+1.09, -0.83) ×10-12 erg cm-1s-1 Peak XRT flux: 2.12 (+1.09, -0.83) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum

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.

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Exposure map

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FITS exposure map.