sb25101004: Swift observation summary

Mission:	SVOM/ECLAIRs
SVOM RA:	311.321°
SVOM Dec:	-31.412°
SVOM Err:	8.1 arcmin
T0:	2025-10-10 03:47:53 UT
Galactic:	12.58° -36.84°
Galactic N_H:	6.10× 10²⁰ cm^-2

Sun distance:	108.09°
Sun angle:	7.73 [hr] (East of Sun)
Moon distance:	113.94°
Visibility of this field.
First slew:	2025-10-10 04:06:25 UT
First observation:	2025-10-10 04:05:54 UT
First analysis:	2025-10-10 06:46:16 UT

Data analysed so far:

ObsID: 03000134001 with 2.1 ks exposure.

About tiled field analysis.

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

3000134 — 2.1 ks of cleaned data taken between 2025-10-10 04:06:23 and 2025-10-10 05:39:15

Details of afterglow candidates

4 sources were found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Rank³	Dist from SVOM/ECLAIRs pos	Exposure	Notes
1 [details]	20h 45m 10.19s311.29245°	-31° 20′ 37.7″-31.34380°	2.5′′ ^*	Good	2 (O)	4.3′	325 s	This source may be affected by optical loading This source may be affected by optical loading Matches SIMBAD source: NAME AU Mic e, 11.2″ away. Matches known X-ray source: LSXPS J204509.8-312033 (from LSXPS), 5.3″ away.
Mean XRT rate: 17.7 (±1.8) ct s^-1 Peak XRT rate: 18.9 (±3.0) ct s^-1 -6.05 σ above the catalogued flux from LSXPS. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Products: Light curve \| Enhanced position
2 [details]	20h 45m 03.88s311.26616°	-31° 21′ 16.6″-31.35462°	4.0′′ ^*	Good	1 (T)	4.4′	2.1 ks	The source is fading with 3.4-σ significance. The source is 3.9-σ above the RASS limit. This source is extended or caused by diffuse emission.
Mean XRT rate: 4.77 (±0.17) ct s^-1 Peak XRT rate: 11.0 (±2.1) ct s^-1 RASS PSPC 3-σ upper limit: 2.96 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 5.97 (±0.21) ct s^-1 Peak XRT rate converted to PSPC: 13.8 (±2.6) ct s^-1 Mean XRT flux: 1.76 (±0.06) ×10^-10 erg cm^-1s^-1 Peak XRT flux: 4.1 (±0.8) ×10^-10 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
3 [details]	20h 45m 07.62s311.28176°	-31° 20′ 33.4″-31.34262°	3.8′′ ^*	Reasonable	2 (O)	4.6′	325 s	This source may be affected by optical loading This source is extended or caused by diffuse emission. Matches known X-ray source: 1AXG J204508-3119 (from ASCA/ASCAGIS), 31.581010478147″ away.
Mean XRT rate: 20 (±4) ct s^-1 Peak XRT rate: 20 (±4) ct s^-1 -5.60 σ above the catalogued flux from ASCA/ASCAGIS. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 24 (±4) ct s^-1 Peak XRT rate converted to PSPC: 24 (±4) ct s^-1 Mean XRT flux: 8.1 (±1.4) ×10^-10 erg cm^-1s^-1 Peak XRT flux: 8.1 (±1.4) ×10^-10 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
4 [details]	20h 45m 14.41s311.31003°	-31° 20′ 01.5″-31.33375°	7.9′′	Reasonable	1 (T)	4.7′	2.1 ks	The source is fading with 5.0-σ significance. The source is 5.3-σ above the RASS limit. This source is extended or caused by diffuse emission.
Mean XRT rate: 33.0 (±0.6) ct s^-1 Peak XRT rate: 67.9 (±12.1) ct s^-1 RASS PSPC 3-σ upper limit: 3.52 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 38.7 (±0.7) ct s^-1 Peak XRT rate converted to PSPC: 79.6 (±14.2) ct s^-1 Mean XRT flux: 1.353 (±0.024) ×10^-9 erg cm^-1s^-1 Peak XRT flux: 2.8 (±0.5) ×10^-9 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 7 sources have been found in the XRT data. 3 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Rank³	Dist from SVOM/ECLAIRs pos	Exposure	Notes
1 [details]	20h 45m 10.19s311.29245°	-31° 20′ 37.7″-31.34380°	2.5′′ ^*	Good	2 (O)	4.3′	325 s	This source may be affected by optical loading This source may be affected by optical loading Matches SIMBAD source: NAME AU Mic e, 11.2″ away. Matches known X-ray source: LSXPS J204509.8-312033 (from LSXPS), 5.3″ away.
Mean XRT rate: 17.7 (±1.8) ct s^-1 Peak XRT rate: 18.9 (±3.0) ct s^-1 -6.05 σ above the catalogued flux from LSXPS. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Products: Light curve \| Enhanced position
2 [details]	20h 45m 03.88s311.26616°	-31° 21′ 16.6″-31.35462°	4.0′′ ^*	Good	1 (T)	4.4′	2.1 ks	The source is fading with 3.4-σ significance. The source is 3.9-σ above the RASS limit. This source is extended or caused by diffuse emission.
Mean XRT rate: 4.77 (±0.17) ct s^-1 Peak XRT rate: 11.0 (±2.1) ct s^-1 RASS PSPC 3-σ upper limit: 2.96 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 5.97 (±0.21) ct s^-1 Peak XRT rate converted to PSPC: 13.8 (±2.6) ct s^-1 Mean XRT flux: 1.76 (±0.06) ×10^-10 erg cm^-1s^-1 Peak XRT flux: 4.1 (±0.8) ×10^-10 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
3 [details]	20h 45m 07.62s311.28176°	-31° 20′ 33.4″-31.34262°	3.8′′ ^*	Reasonable	2 (O)	4.6′	325 s	This source may be affected by optical loading This source is extended or caused by diffuse emission. Matches known X-ray source: 1AXG J204508-3119 (from ASCA/ASCAGIS), 31.581010478147″ away.
Mean XRT rate: 20 (±4) ct s^-1 Peak XRT rate: 20 (±4) ct s^-1 -5.60 σ above the catalogued flux from ASCA/ASCAGIS. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 24 (±4) ct s^-1 Peak XRT rate converted to PSPC: 24 (±4) ct s^-1 Mean XRT flux: 8.1 (±1.4) ×10^-10 erg cm^-1s^-1 Peak XRT flux: 8.1 (±1.4) ×10^-10 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
4 [details]	20h 45m 14.41s311.31003°	-31° 20′ 01.5″-31.33375°	7.9′′	Reasonable	1 (T)	4.7′	2.1 ks	The source is fading with 5.0-σ significance. The source is 5.3-σ above the RASS limit. This source is extended or caused by diffuse emission.
Mean XRT rate: 33.0 (±0.6) ct s^-1 Peak XRT rate: 67.9 (±12.1) ct s^-1 RASS PSPC 3-σ upper limit: 3.52 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 38.7 (±0.7) ct s^-1 Peak XRT rate converted to PSPC: 79.6 (±14.2) ct s^-1 Mean XRT flux: 1.353 (±0.024) ×10^-9 erg cm^-1s^-1 Peak XRT flux: 2.8 (±0.5) ×10^-9 erg cm^-1s^-1 Products: Light curve \| Spectrum
5 [details]	20h 45m 42.55s311.42731°	-31° 16′ 44.0″-31.27888°	5.7′′	Poor	4 (K)	9.7′	2.1 ks	Matches SIMBAD source: 2XMM J204542.1-311652, 8.8″ away. Matches known X-ray source: LSXPS J204542.2-311652 (from LSXPS), 9.4″ away.
Mean XRT rate: 8.3 (+3.0, -2.5) ×10^-3 ct s^-1 Peak XRT rate: 8.3 (+3.0, -2.5) ×10^-3 ct s^-1 -1.43 σ above the catalogued flux from LSXPS. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.012 (±0.004) ×10^-2 ct s^-1 Peak XRT rate converted to PSPC: 0.012 (±0.004) ×10^-2 ct s^-1 Mean XRT flux: 2.2 (+0.8, -0.7) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.2 (+0.8, -0.7) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum
6 [details]	20h 45m 04.81s311.27005°	-31° 21′ 50.1″-31.36392°	4.1′′ ^*	Poor	3 (U)	3.9′	2.1 ks	This source is extended or caused by diffuse emission.
Mean XRT rate: 0.101 (±0.009) ct s^-1 Peak XRT rate: 0.20 (±0.05) ct s^-1 RASS PSPC 3-σ upper limit: 2.94 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.126 (+0.012, -0.011) ct s^-1 Peak XRT rate converted to PSPC: 0.25 (±0.06) ct s^-1 Mean XRT flux: 3.7 (±0.3) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 7.3 (±1.7) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
7 [details]	20h 45m 00.91s311.25380°	-31° 32′ 59.1″-31.54976°	6.8′′	Poor	3 (U)	9.0′	2.1 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.06 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: undetermined ct s^-1 Peak XRT rate converted to PSPC: undetermined ct s^-1 Mean XRT flux: undetermined erg cm^-1s^-1 Peak XRT flux: undetermined erg cm^-1s^-1 Products: Light curve \| Spectrum

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