Skip banner and navigation tools.

School of Physics & Astronomy

US Site | Italian Site | UK site

Home > SVOM follow up > GRB 250806A

SVOM_FIELD00026

SVOM

26

/SVOM

GRB 250806A: Swift observation summary

This is a confirmed GRB (GRB 250806A), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019983 for updated analysis

Data analysed so far:

• ObsID: 00019983001 with 1.0 ks exposure.

About tiled field analysis.

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

• 19983 — 972 s of cleaned data taken between 2025-08-06 07:59:47 and 2025-08-06 08:20:30

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]	23h 13m 43.16s348.42983°	+01° 21′ 18.1″1.35502°	3.7′′	Good	2 (O)	7.4′	972 s	The source is fading with 3.7-σ significance. The source is 4.1-σ above the RASS limit.
Mean XRT rate: 0.222 (±0.021) ct s-1 Peak XRT rate: 0.54 (±0.12) ct s-1 RASS PSPC 3-σ upper limit: 0.04 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.224 (±0.021) ct s-1 Peak XRT rate converted to PSPC: 0.55 (±0.12) ct s-1 Mean XRT flux: 1.03 (±0.10) ×10-11 erg cm-1s-1 Peak XRT flux: 2.5 (±0.6) ×10-11 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.

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]	23h 13m 43.16s348.42983°	+01° 21′ 18.1″1.35502°	3.7′′	Good	2 (O)	7.4′	972 s	The source is fading with 3.7-σ significance. The source is 4.1-σ above the RASS limit.
Mean XRT rate: 0.222 (±0.021) ct s-1 Peak XRT rate: 0.54 (±0.12) ct s-1 RASS PSPC 3-σ upper limit: 0.04 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.224 (±0.021) ct s-1 Peak XRT rate converted to PSPC: 0.55 (±0.12) ct s-1 Mean XRT flux: 1.03 (±0.10) ×10-11 erg cm-1s-1 Peak XRT flux: 2.5 (±0.6) ×10-11 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.

Image

Select image style: Draggable PNG | JS9.

Magnify image and make scrollable?

FITS image.

---

Exposure map

Magnify exposure map and make scrollable?

FITS exposure map.