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.

18992 — 5.4 ks of cleaned data taken between 2024-12-17 12:18:20 and 2024-12-18 08:46:34

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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FITS exposure map.