EP241217a: Swift observation summary

This is a confirmed GRB (EP241217a), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00018992 for updated analysis

Mission:	Einstein Probe/WXT
Einstein Probe RA:	46.957°
Einstein Probe Dec:	+30.901°
Einstein Probe Err:	3.07998 arcsec
T0:	2024-12-17 05:36:03 UT
Galactic:	154.56° -23.47°
Galactic N_H:	1.07× 10²¹ cm^-2

Sun distance:	145.48°
Sun angle:	9.46 [hr](East of Sun)
Moon distance:	56.22°
Visibility of this field.
First slew:	2024-12-17 12:18:22 UT
First observation:	2024-12-17 12:17:50 UT
First analysis:	2024-12-18 01:17:35 UT

Data analysed so far:

ObsID: 00018992001 with 1.5 ks exposure.
ObsID: 00018992002 with 1.8 ks exposure.
ObsID: 00018992003 with 2.1 ks exposure.

About tiled field analysis.

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

1 fields were processed but not included in the analysis. This is because, after standard processing and the removal of times contaminated by light reflected off the bright Earth, there was too little data (<100 s) for source detection to be performed.

Find an upper limit.

Sources found so far

So far 8 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]	03h 07m 46.03s46.94180°	+30° 55′ 45.2″30.92923°	3.6′′ ^*	Good	3 (U)	1.9′	5.4 ks	The source is fading with 3.2-σ significance.
Mean XRT rate: 3.7 (±0.6) ×10^-2 ct s^-1 Peak XRT rate: 5.9 (±1.5) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.042 (±0.007) ct s^-1 Peak XRT rate converted to PSPC: 0.067 (±0.018) ×10^-2 ct s^-1 Mean XRT flux: 1.48 (±0.23) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 2.4 (±0.6) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
2 [details]	03h 08m 05.72s47.02382°	+30° 49′ 33.4″30.82595°	3.1′′ ^*	Good	4 (K)	5.7′	5.4 ks	Matches SIMBAD source: 2MASS J03080580+3049327, 1.1″ away. Matches known X-ray source: 1RXS J030805.2+304943 (from ROSAT/RASSFSC), 13.79234193971″ away.
Mean XRT rate: 2.4 (±0.3) ×10^-2 ct s^-1 Peak XRT rate: 3.0 (±0.7) ×10^-2 ct s^-1 0.00 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: 0.025 (±0.003) ct s^-1 Peak XRT rate converted to PSPC: 0.031 (±0.007) ×10^-2 ct s^-1 Mean XRT flux: 9.1 (±1.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.13 (±0.25) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
3 [details]	03h 08m 25.76s47.10733°	+30° 52′ 14.4″30.87066°	5.6′′ ^*	Good	3 (U)	8.0′	5.4 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.02 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]	03h 08m 07.98s47.03323°	+31° 03′ 26.4″31.05733°	8.3′′	Poor	3 (U)	10.2′	5.4 ks
Mean XRT rate: 3.3 (+1.3, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 3.3 (+1.3, -1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.08 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 1.9 (+0.8, -0.6) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 1.9 (+0.8, -0.6) ×10^-3 ct s^-1 Mean XRT flux: 1.3 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.3 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum
5 [details]	03h 07m 01.14s46.75477°	+30° 56′ 41.2″30.94477°	5.3′′	Reasonable	3 (U)	10.7′	5.4 ks
Mean XRT rate: 1.87 (+1.06, -0.82) ×10^-3 ct s^-1 Peak XRT rate: 1.87 (+1.06, -0.82) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.06 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 1.3 (+0.7, -0.6) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 1.3 (+0.7, -0.6) ×10^-3 ct s^-1 Mean XRT flux: 1.0 (+0.6, -0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.0 (+0.6, -0.4) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum
6 [details]	03h 08m 10.48s47.04367°	+30° 50′ 32.5″30.84237°	5.6′′ ^*	Poor	3 (U)	5.7′	5.4 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.06 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
7 [details]	03h 07m 02.96s46.76234°	+30° 53′ 02.3″30.88397°	7.7′′	Poor	3 (U)	10.1′	5.4 ks
Mean XRT rate: 2.31 (+1.11, -0.90) ×10^-3 ct s^-1 Peak XRT rate: 2.31 (+1.11, -0.90) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 4.1 (+2.0, -1.6) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 4.1 (+2.0, -1.6) ×10^-3 ct s^-1 Products: Light curve
8 [details]	03h 07m 07.22s46.78007°	+30° 53′ 42.3″30.89507°	15.6′′ ^*	Poor	3 (U)	9.1′	5.4 ks
Mean XRT rate: 2.9 (+1.3, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 2.9 (+1.3, -1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (PSPC count-rate) 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.

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Exposure map

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FITS exposure map.