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Home > Einstein Probe follow up > EP251130a

EP_FIELD00085

EP

85

/EP

EP251130a: Swift observation summary

Data analysed so far:

• ObsID: 03000224001 with 2.0 ks exposure.

About tiled field analysis.

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

• 3000224 — 2.0 ks of cleaned data taken between 2025-11-30 12:43:48 and 2025-11-30 14:26:06

Details of afterglow candidates

1 sources were found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Rank3	Dist from Einstein Probe/WXT pos	Exposure	Notes	Vizier
1 [details]	06h 44m 04.96s101.02067°	+27° 23′ 02.8″27.38412°	2.9′′ *	Good	1 (T)	1.2′	3.4 ks	The source is fading with 4.4-σ significance. The source is 3.5-σ above the RASS limit.
Mean XRT rate: 6.2 (±0.7) ×10-2 ct s-1 Peak XRT rate: 0.14 (±0.03) ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.078 (±0.009) ct s-1 Peak XRT rate converted to PSPC: 0.18 (±0.04) ct s-1 Mean XRT flux: 2.20 (±0.25) ×10-12 erg cm-1s-1 Peak XRT flux: 5.0 (±1.1) ×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 3 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Rank3	Dist from Einstein Probe/WXT pos	Exposure	Notes	Vizier
1 [details]	06h 44m 04.96s101.02067°	+27° 23′ 02.8″27.38412°	2.9′′ *	Good	1 (T)	1.2′	3.4 ks	The source is fading with 4.4-σ significance. The source is 3.5-σ above the RASS limit.
Mean XRT rate: 6.2 (±0.7) ×10-2 ct s-1 Peak XRT rate: 0.14 (±0.03) ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.078 (±0.009) ct s-1 Peak XRT rate converted to PSPC: 0.18 (±0.04) ct s-1 Mean XRT flux: 2.20 (±0.25) ×10-12 erg cm-1s-1 Peak XRT flux: 5.0 (±1.1) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position
2 [details]	06h 43m 39.45s100.91436°	+27° 23′ 25.5″27.39043°	8.9′′ *	Good	3 (U)	6.7′	3.4 ks
Mean XRT rate: 4.6 (+1.8, -1.4) ×10-3 ct s-1 Peak XRT rate: 5.1 (+3.2, -2.3) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.04 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 4.6 (+1.8, -1.3) ×10-3 ct s-1 Peak XRT rate converted to PSPC: 5.0 (+3.2, -2.2) ×10-3 ct s-1 Mean XRT flux: 3.34 (+1.32, -0.97) ×10-13 erg cm-1s-1 Peak XRT flux: 3.7 (+2.3, -1.6) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position
3 [details]	06h 43m 43.88s100.93283°	+27° 29′ 14.3″27.48730°	7.2′′	Good	3 (U)	8.0′	3.4 ks
Mean XRT rate: 5.3 (+2.4, -1.9) ×10-3 ct s-1 Peak XRT rate: 5.3 (+2.4, -1.9) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.04 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 6.8 (+3.1, -2.4) ×10-3 ct s-1 Peak XRT rate converted to PSPC: 6.8 (+3.1, -2.4) ×10-3 ct s-1 Mean XRT flux: 1.7 (+0.8, -0.6) ×10-13 erg cm-1s-1 Peak XRT flux: 1.7 (+0.8, -0.6) ×10-13 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

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FITS image.

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Exposure map

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FITS exposure map.