EP#01709131775: Swift observation summary

Mission:	Einstein Probe/WXT
Einstein Probe RA:	80.748°
Einstein Probe Dec:	-8.833°
Einstein Probe Err:	3.1 arcmin
T0:	2025-02-17 06:56:23 UT
Galactic:	210.87° -23.64°
Galactic N_H:	1.13× 10²¹ cm^-2

Sun distance:	107.46°
Sun angle:	7.34 [hr](East of Sun)
Moon distance:	115.37°
Visibility of this field.
First slew:	2025-02-17 07:02:49 UT
First observation:	2025-02-17 07:02:16 UT
First analysis:	2025-02-17 09:42:30 UT

Data analysed so far:

ObsID: 00019557001 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.

19557 — 1.9 ks of cleaned data taken between 2025-02-17 07:02:46 and 2025-02-17 08:36:11

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]	05h 22m 57.16s80.73816°	-08° 50′ 13.0″-8.83695°	2.5′′ ^*	Good	2 (O)	0.6′	1.9 ks	The source is fading with 3.5-σ significance. Matches SIMBAD source: RX J0523.0-0850, 1.8″ away. Matches known X-ray source: 2SXPS J052256.7-085017 (from 2SXPS), 7.6″ away.
Mean XRT rate: 2.01 (±0.06) ct s^-1 Peak XRT rate: 4.5 (±1.0) ct s^-1 -4.65 σ above the catalogued flux from 2SXPS. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 2.42 (±0.08) ct s^-1 Peak XRT rate converted to PSPC: 5.4 (±1.1) ct s^-1 Mean XRT flux: 7.33 (±0.24) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 1.6 (±0.3) ×10^-10 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 5 sources have been found in the XRT data. 5 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Rank³	Dist from Einstein Probe/WXT pos	Exposure	Notes
1 [details]	05h 22m 57.16s80.73816°	-08° 50′ 13.0″-8.83695°	2.5′′ ^*	Good	2 (O)	0.6′	1.9 ks	The source is fading with 3.5-σ significance. Matches SIMBAD source: RX J0523.0-0850, 1.8″ away. Matches known X-ray source: 2SXPS J052256.7-085017 (from 2SXPS), 7.6″ away.
Mean XRT rate: 2.01 (±0.06) ct s^-1 Peak XRT rate: 4.5 (±1.0) ct s^-1 -4.65 σ above the catalogued flux from 2SXPS. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 2.42 (±0.08) ct s^-1 Peak XRT rate converted to PSPC: 5.4 (±1.1) ct s^-1 Mean XRT flux: 7.33 (±0.24) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 1.6 (±0.3) ×10^-10 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
2 [details]	05h 23m 12.00s80.79999°	-08° 43′ 30.6″-8.72516°	5.3′′ ^*	Good	4 (K)	7.2′	1.9 ks	Matches SIMBAD source: 1RXS J052311.7-084332, 6.2″ away. Matches known X-ray source: 4XMM J052312.1-084330 (from XMM-NEWTON/XMMSSC), 0.78150699448746″ away.
Mean XRT rate: 1.2 (+0.4, -0.3) ×10^-2 ct s^-1 Peak XRT rate: 1.2 (+0.4, -0.3) ×10^-2 ct s^-1 -0.65 σ above the catalogued flux from XMM-NEWTON/XMMSSC. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.014 (+0.005, -0.004) ct s^-1 Peak XRT rate converted to PSPC: 0.014 (+0.005, -0.004) ×10^-2 ct s^-1 Mean XRT flux: 4.8 (+1.6, -1.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 4.8 (+1.6, -1.3) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
3 [details]	05h 23m 03.69s80.76537°	-08° 47′ 34.3″-8.79286°	6.3′′ ^*	Good	4 (K)	2.6′	1.9 ks	Matches known X-ray source: 2SXPS J052303.9-084731 (from 2SXPS), 3.9″ away.
Mean XRT rate: 6.9 (+2.9, -2.4) ×10^-3 ct s^-1 Peak XRT rate: 6.9 (+2.9, -2.4) ×10^-3 ct s^-1 1.37 σ below the catalogued flux from 2SXPS. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.012 (+0.005, -0.004) ×10^-2 ct s^-1 Peak XRT rate converted to PSPC: 0.012 (+0.005, -0.004) ×10^-2 ct s^-1 Mean XRT flux: 1.5 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.5 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
4 [details]	05h 22m 36.32s80.65134°	-08° 49′ 27.3″-8.82424°	5.7′′	Good	4 (K)	5.8′	1.9 ks	Matches SIMBAD source: TYC 5332-1692-1, 0.5″ away. Matches known X-ray source: 2SXPS J052236.1-084927 (from 2SXPS), 3″ away.
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 -1.05 σ above the catalogued flux from 2SXPS. RASS PSPC 3-σ upper limit: 0.0×10⁰ 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
5 [details]	05h 22m 33.48s80.63951°	-08° 48′ 48.6″-8.81351°	5.8′′	Poor	4 (K)	6.5′	1.9 ks	Matches SIMBAD source: Gaia DR3 3014521104206681344, 3.9″ away. Matches known X-ray source: 4XMM J052233.2-084846 (from XMM-NEWTON/XMMSSC), 3.4940742289259″ away.
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 -1.21 σ above the catalogued flux from XMM-NEWTON/XMMSSC. RASS PSPC 3-σ upper limit: 0.0×10⁰ 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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