EP251124a: Swift observation summary

Mission:	Einstein Probe/WXT
Einstein Probe RA:	43.732°
Einstein Probe Dec:	+41.577°
Einstein Probe Err:	3.1 arcmin
T0:	2025-11-24 11:10:05 UT
Galactic:	146.42° -15.59°
Galactic N_H:	8.74× 10²⁰ cm^-2

Sun distance:	154.91°
Sun angle:	10.92 [hr](East of Sun)
Moon distance:	124.39°
Visibility of this field.
First slew:	2025-11-24 12:35:41 UT
First observation:	2025-11-24 12:35:10 UT
First analysis:	2025-11-24 15:21:36 UT

Data analysed so far:

ObsID: 03000217001 with 2.5 ks exposure.

About tiled field analysis.

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

3000217 — 2.5 ks of cleaned data taken between 2025-11-24 12:35:38 and 2025-11-24 14:15:23

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 Einstein Probe/WXT pos	Exposure	Notes
1 [details]	02h 54m 27.08s43.61282°	+41° 34′ 51.3″41.58091°	2.5′′ ^*	Good	4 (K)	5.4′	2.5 ks	Matches SIMBAD source: NGC 1129, 7.4″ away. Matches known X-ray source: LSXPS J025426.9+413450 (from LSXPS), 1.4″ away.
Mean XRT rate: 0.53 (±0.04) ct s^-1 Peak XRT rate: 0.94 (±0.25) ct s^-1 -3.54 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: 0.67 (±0.05) ct s^-1 Peak XRT rate converted to PSPC: 1.2 (±0.3) ct s^-1 Mean XRT flux: 1.76 (±0.12) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 3.1 (±0.8) ×10^-11 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
2 [details]	02h 54m 50.14s43.70892°	+41° 37′ 25.4″41.62371°	4.8′′ ^*	Good	3 (U)	3.0′	2.5 ks	Matches SIMBAD source: 2MASX J02544959+4137278, 5.1″ away.
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.04 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 \| Enhanced position
3 [details]	02h 55m 10.73s43.79472°	+41° 34′ 45.8″41.57940°	5.3′′ ^*	Poor	3 (U)	2.8′	2.5 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.17 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 \| Enhanced position
4 [details]	02h 54m 17.40s43.57252°	+41° 38′ 46.8″41.64632°	5.1′′ ^*	Poor	4 (K)	8.3′	2.5 ks	Matches known X-ray source: LSXPS J025416.3+413842 (from LSXPS), 10.3″ away.
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 0.99 σ below 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
5 [details]	02h 54m 06.47s43.52694°	+41° 30′ 21.1″41.50585°	7.3′′	Poor	3 (U)	10.2′	2.5 ks
Mean XRT rate: 1.4 (±0.3) ×10^-2 ct s^-1 Peak XRT rate: 1.4 (±0.3) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.014 (±0.003) ct s^-1 Peak XRT rate converted to PSPC: 0.014 (±0.003) ×10^-2 ct s^-1 Mean XRT flux: 5.5 (±1.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 5.5 (±1.3) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum
6 [details]	02h 54m 45.03s43.68762°	+41° 34′ 29.6″41.57489°	5.4′′	Poor	3 (U)	2.0′	2.5 ks
Mean XRT rate: 2.6 (+0.9, -0.7) ×10^-2 ct s^-1 Peak XRT rate: 4.8 (+2.3, -1.8) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.18 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.0324 (+0.0107, -0.0090) ct s^-1 Peak XRT rate converted to PSPC: 0.060 (+0.029, -0.023) ×10^-2 ct s^-1 Mean XRT flux: 9.3 (+3.1, -2.6) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.7 (+0.8, -0.7) ×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.

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Exposure map

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FITS exposure map.