GRB 260909A: Swift observation summary

Mission:	SVOM/ECLAIRs
GRB RA:	13.032°
GRB Dec:	+24.191°
GRB Err:	42 arcsec
T0:	2026-09-09 11:18:39 UT
Galactic:	123.13° -38.68°
Galactic N_H:	3.91× 10²⁰ cm^-2
Galactic E(B-V):	0.04368998

Sun distance:	141.38°
Sun angle:	10.30 [hr](West of Sun)
Moon distance:	121.40°
Visibility of this field.

Data analysed so far:

ObsID: 00021911002 with 2.2 ks exposure.

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Sources found so far

So far 4 sources have been found in the XRT data. 2 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from SVOM/ECLAIRs pos	Exposure	Notes
1 [details]	00h 52m 29.73s13.12386°	+24° 21′ 03.1″24.35086°	6.7′′	Good	10.8′	456 s	Matches known X-ray source: XMMSL3 J005230.3+242112 (from XMM-NEWTON/XMMSLEWCLN), 11.6″ away. Matches SIMBAD source: NGC 280, 7.5″ away.
Mean XRT rate: 3.4 (+1.3, -1.1) ×10^-2 ct s^-1 Peak XRT rate: 3.4 (+1.3, -1.1) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.2 (+0.5, -0.4) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.2 (+0.5, -0.4) ×10^-12 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	00h 52m 40.01s13.16673°	+24° 06′ 54.3″24.11508°	7.6′′	Good	8.7′	2.2 ks
Mean XRT rate: 6.6 (+2.5, -2.0) ×10^-3 ct s^-1 Peak XRT rate: 6.6 (+2.5, -2.0) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.19 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.7 (+1.4, -1.1) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.7 (+1.4, -1.1) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
3 [details]	00h 52m 04.12s13.01716°	+24° 07′ 02.8″24.11745°	7.6′′	Good	4.5′	2.2 ks	Matches SIMBAD source: SDSS J005204.28+240708.0, 5.7″ away.
Mean XRT rate: 3.7 (+1.9, -1.4) ×10^-3 ct s^-1 Peak XRT rate: 3.7 (+1.9, -1.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.44 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.3 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.3 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
4 [details]	00h 52m 01.12s13.00466°	+24° 12′ 36.4″24.21012°	6.3′′	Good	1.9′	2.2 ks
Mean XRT rate: 3.5 (+1.8, -1.3) ×10^-3 ct s^-1 Peak XRT rate: 3.5 (+1.8, -1.3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.29 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 6.9 (+3.5, -2.7) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 6.9 (+3.5, -2.7) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the 1SXPS documentation.
^* 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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Exposure map

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FITS exposure map.