EP#01709248635: Swift observation summary

Mission:	Einstein Probe/WXT
Einstein Probe RA:	65.939°
Einstein Probe Dec:	+15.642°
Einstein Probe Err:	3.1 arcmin
T0:	2025-11-21 16:11:59 UT
Galactic:	179.73° -23.07°
Galactic N_H:	1.49× 10²¹ cm^-2

Sun distance:	170.47°
Sun angle:	11.41 [hr](West of Sun)
Moon distance:	166.73°
Visibility of this field.
First slew:	2025-11-21 16:44:51 UT
First observation:	2025-11-21 16:44:21 UT
First analysis:	2025-11-21 23:01:22 UT

Data analysed so far:

ObsID: 03000211001 with 0.8 ks exposure.

About tiled field analysis.

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

3000211 — 754 s of cleaned data taken between 2025-11-21 16:44:49 and 2025-11-21 17:01:21

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]	04h 23m 41.31s65.92213°	+15° 37′ 54.4″15.63177°	2.7′′ ^*	Good	2 (O)	1.2′	754 s	Matches SIMBAD source: HD 285751, 3.6″ away. Matches known X-ray source: XMMSL3 J042341.3+153758 (from XMM-NEWTON/XMMSLEWCLN), 1.7363498228968″ away.
Mean XRT rate: 0.80 (±0.05) ct s^-1 Peak XRT rate: 1.20 (±0.27) ct s^-1 -3.03 σ above the catalogued flux from XMM-NEWTON/XMMSLEWCLN. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 1.24 (±0.08) ct s^-1 Peak XRT rate converted to PSPC: 1.9 (±0.4) ct s^-1 Mean XRT flux: 2.04 (±0.13) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 3.1 (±0.7) ×10^-11 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 4 sources have been found in the XRT data. 4 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Rank³	Dist from Einstein Probe/WXT pos	Exposure	Notes
1 [details]	04h 23m 41.31s65.92213°	+15° 37′ 54.4″15.63177°	2.7′′ ^*	Good	2 (O)	1.2′	754 s	Matches SIMBAD source: HD 285751, 3.6″ away. Matches known X-ray source: XMMSL3 J042341.3+153758 (from XMM-NEWTON/XMMSLEWCLN), 1.7363498228968″ away.
Mean XRT rate: 0.80 (±0.05) ct s^-1 Peak XRT rate: 1.20 (±0.27) ct s^-1 -3.03 σ above the catalogued flux from XMM-NEWTON/XMMSLEWCLN. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 1.24 (±0.08) ct s^-1 Peak XRT rate converted to PSPC: 1.9 (±0.4) ct s^-1 Mean XRT flux: 2.04 (±0.13) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 3.1 (±0.7) ×10^-11 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
2 [details]	04h 23m 33.68s65.89035°	+15° 41′ 20.0″15.68888°	5.6′′ ^*	Good	4 (K)	4.0′	754 s	This source may be affected by optical loading Matches SIMBAD source: 2E 0420.7+1534, 9.5″ away. Matches known X-ray source: 1RXS J042334.4+154204 (from ROSAT/RASSFSC), 41.543472600029″ away.
Mean XRT rate: 2.8 (±0.7) ×10^-2 ct s^-1 Peak XRT rate: 2.8 (±0.7) ×10^-2 ct s^-1 1.33 σ below the catalogued flux from ROSAT/RASSFSC. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.031 (±0.008) ct s^-1 Peak XRT rate converted to PSPC: 0.031 (±0.008) ×10^-2 ct s^-1 Mean XRT flux: 1.14 (±0.30) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.14 (±0.30) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
3 [details]	04h 23m 25.54s65.85643°	+15° 45′ 53.6″15.76490°	7.0′′	Good	4 (K)	8.8′	754 s	This source may be affected by optical loading Matches SIMBAD source: V* V989 Tau, 7.4″ away. Matches known X-ray source: 1WGA J0423.4+1545 (from ROSAT/WGACAT), 34.72470712082″ away.
Mean XRT rate: 10 (+6, -4) ×10^-3 ct s^-1 Peak XRT rate: 10 (+6, -4) ×10^-3 ct s^-1 14.20 σ below the catalogued flux from ROSAT/WGACAT. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 6.2 (+3.7, -2.7) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 6.2 (+3.7, -2.7) ×10^-3 ct s^-1 Products: Light curve
4 [details]	04h 23m 35.23s65.89677°	+15° 41′ 17.0″15.68805°	8.4′′	Poor	4 (K)	3.7′	754 s	This source may be affected by optical loading Matches known X-ray source: XMMSL3 J042334.9+154124 (from XMM-NEWTON/XMMSLEWCLN), 7.4730251491088″ away.
Mean XRT rate: 6 (+5, -3) ×10^-3 ct s^-1 Peak XRT rate: 6 (+5, -3) ×10^-3 ct s^-1 2.05 σ below the catalogued flux from XMM-NEWTON/XMMSLEWCLN. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Products: Light curve

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Exposure map

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FITS exposure map.