EP#01709132801: Swift observation summary

Mission:	Einstein Probe/WXT
Einstein Probe RA:	133.216°
Einstein Probe Dec:	+22.504°
Einstein Probe Err:	3.1 arcmin
T0:	2025-03-16 07:30:48 UT
Galactic:	203.83° +36.16°
Galactic N_H:	3.03× 10²⁰ cm^-2

Sun distance:	133.61°
Sun angle:	9.15 [hr](East of Sun)
Moon distance:	68.66°
Visibility of this field.
First slew:	2025-03-16 09:55:45 UT
First observation:	2025-03-16 09:55:11 UT
First analysis:	2025-03-16 12:27:26 UT

Data analysed so far:

ObsID: 00019619001 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.

19619 — 2.0 ks of cleaned data taken between 2025-03-16 09:55:41 and 2025-03-16 11:38:50

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]	08h 52m 44.55s133.18562°	+22° 30′ 48.1″22.51336°	2.6′′ ^*	Good	2 (O)	1.8′	2.0 ks	Matches SIMBAD source: LP 368-98, 6.1″ away. Matches known X-ray source: XMMSL3 J085244.1+223053 (from XMM-NEWTON/XMMSLEWCLN), 8.0235708668729″ away.
Mean XRT rate: 0.564 (±0.024) ct s^-1 Peak XRT rate: 1.03 (±0.23) ct s^-1 -3.64 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: 0.82 (±0.04) ct s^-1 Peak XRT rate converted to PSPC: 1.5 (±0.3) ct s^-1 Mean XRT flux: 1.65 (±0.07) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 3.0 (±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. 1 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Rank³	Dist from Einstein Probe/WXT pos	Exposure	Notes
1 [details]	08h 52m 44.55s133.18562°	+22° 30′ 48.1″22.51336°	2.6′′ ^*	Good	2 (O)	1.8′	2.0 ks	Matches SIMBAD source: LP 368-98, 6.1″ away. Matches known X-ray source: XMMSL3 J085244.1+223053 (from XMM-NEWTON/XMMSLEWCLN), 8.0235708668729″ away.
Mean XRT rate: 0.564 (±0.024) ct s^-1 Peak XRT rate: 1.03 (±0.23) ct s^-1 -3.64 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: 0.82 (±0.04) ct s^-1 Peak XRT rate converted to PSPC: 1.5 (±0.3) ct s^-1 Mean XRT flux: 1.65 (±0.07) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 3.0 (±0.7) ×10^-11 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
2 [details]	08h 53m 26.40s133.36002°	+22° 30′ 28.3″22.50787°	6.0′′	Reasonable	3 (U)	8.0′	2.0 ks
Mean XRT rate: 4.1 (+2.3, -1.7) ×10^-3 ct s^-1 Peak XRT rate: 4.1 (+2.3, -1.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.24 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 8 (+4, -3) ×10^-4 ct s^-1 Peak XRT rate converted to PSPC: 8 (+4, -3) ×10^-4 ct s^-1 Mean XRT flux: 2.41 (+1.33, -0.98) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 2.41 (+1.33, -0.98) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum
3 [details]	08h 52m 31.05s133.12940°	+22° 35′ 04.5″22.58459°	6.9′′	Reasonable	3 (U)	6.8′	2.0 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.01 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
4 [details]	08h 52m 39.71s133.16548°	+22° 30′ 02.3″22.50064°	6.0′′	Poor	3 (U)	2.8′	2.0 ks
Mean XRT rate: 1.08 (±0.30) ×10^-2 ct s^-1 Peak XRT rate: 1.08 (±0.30) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.038 (±0.010) ct s^-1 Peak XRT rate converted to PSPC: 0.038 (±0.010) ×10^-2 ct s^-1 Mean XRT flux: 2.7 (±0.8) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.7 (±0.8) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum

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FITS exposure map.