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SVOM_FIELD00004

SVOM

4

/SVOM

sb25032302: Swift observation summary

Data analysed so far:

• ObsID: 00019639001 with 1.9 ks exposure.

About tiled field analysis.

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

• 19639 — 1.9 ks of cleaned data taken between 2025-03-23 12:46:23 and 2025-03-23 16:03:37

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
4 [details]	13h 00m 03.50s195.01458°	+28° 00′ 56.6″28.01573°	14.1′′	Poor	2 (O)	9.5′	1.9 ks	Matches SIMBAD source: [ARF2020] COMA 22 5337, 17.6″ away. Matches known X-ray source: LSXPS J130002.4+280050 (from LSXPS), 15.6″ away.
Mean XRT rate: 5.2 (+1.2, -1.1) ×10-2 ct s-1 Peak XRT rate: 5.5 (±1.3) ×10-2 ct s-1 -3.99 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: 0.086 (±0.019) ct s-1 Peak XRT rate converted to PSPC: 0.090 (±0.022) ×10-2 ct s-1 Mean XRT flux: 2.1 (±0.5) ×10-12 erg cm-1s-1 Peak XRT flux: 2.3 (±0.5) ×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.

Find an upper limit.

Sources found so far

So far 6 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	Vizier
1 [details]	12h 59m 28.25s194.86771°	+27° 58′ 08.9″27.96913°	5.3′′	Poor	4 (K)	4.4′	1.9 ks	Matches known X-ray source: LSXPS J125927.6+275811 (from LSXPS), 8.3″ away.
Mean XRT rate: 1.8 (±0.6) ×10-2 ct s-1 Peak XRT rate: 1.8 (±0.6) ×10-2 ct s-1 -2.57 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: 0.035 (±0.012) ct s-1 Peak XRT rate converted to PSPC: 0.035 (±0.012) ×10-2 ct s-1 Mean XRT flux: 2.7 (±0.9) ×10-13 erg cm-1s-1 Peak XRT flux: 2.7 (±0.9) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum
2 [details]	12h 59m 08.09s194.78370°	+28° 09′ 37.3″28.16037°	6.0′′	Poor	3 (U)	7.9′	1.9 ks
Mean XRT rate: undetermined ct s-1 Peak XRT rate: undetermined ct s-1 RASS PSPC 3-σ upper limit: 1.9×10-3 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
3 [details]	13h 00m 08.30s195.03458°	+27° 58′ 33.1″27.97587°	5.6′′	Poor	4 (K)	11.1′	1.9 ks	Matches SIMBAD source: NGC 4889, 4.9″ away. Matches known X-ray source: LSXPS J130007.8+275838 (from LSXPS), 8.3″ away.
Mean XRT rate: 2.7 (±0.6) ×10-2 ct s-1 Peak XRT rate: 3.5 (±1.2) ×10-2 ct s-1 -2.00 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: 0.044 (±0.011) ct s-1 Peak XRT rate converted to PSPC: 0.058 (±0.019) ×10-2 ct s-1 Mean XRT flux: 9.2 (±2.2) ×10-13 erg cm-1s-1 Peak XRT flux: 1.2 (±0.4) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum
4 [details]	13h 00m 03.50s195.01458°	+28° 00′ 56.6″28.01573°	14.1′′	Poor	2 (O)	9.5′	1.9 ks	Matches SIMBAD source: [ARF2020] COMA 22 5337, 17.6″ away. Matches known X-ray source: LSXPS J130002.4+280050 (from LSXPS), 15.6″ away.
Mean XRT rate: 5.2 (+1.2, -1.1) ×10-2 ct s-1 Peak XRT rate: 5.5 (±1.3) ×10-2 ct s-1 -3.99 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: 0.086 (±0.019) ct s-1 Peak XRT rate converted to PSPC: 0.090 (±0.022) ×10-2 ct s-1 Mean XRT flux: 2.1 (±0.5) ×10-12 erg cm-1s-1 Peak XRT flux: 2.3 (±0.5) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum
5 [details]	12h 59m 05.13s194.77138°	+28° 06′ 03.9″28.10108°	6.9′′	Poor	3 (U)	5.1′	1.9 ks
Mean XRT rate: undetermined ct s-1 Peak XRT rate: undetermined ct s-1 RASS PSPC 3-σ upper limit: 0.26 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
6 [details]	13h 00m 10.10s195.04207°	+27° 57′ 11.7″27.95326°	6.2′′	Poor	3 (U)	12.0′	0 s
Mean XRT rate: undetermined ct s-1 Peak XRT rate: undetermined ct s-1 RASS PSPC 3-σ upper limit: 0.13 ct s-1 (PSPC count-rate)

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.