GRB 240118A: Swift observation summary

Mission:	Fermi/LAT
GRB RA:	18.575°
GRB Dec:	+29.789°
GRB Err:	3.0 arcmin
T0:	2024-01-18 01:48:09 UT
Galactic:	128.84° -32.82°
Galactic N_H:	5.85× 10²⁰ cm^-2
Galactic E(B-V):	0.05834519

Sun distance:	91.54°
Sun angle:	5.29 [hr](East of Sun)
Moon distance:	19.82°
Visibility of this field.

Data analysed so far:

ObsID: 00021644001 with 4.7 ks exposure.

Source 3 has been manually confirmed as the GRB afterglow; data for this object are now available through the main GRB results area for this GRB.

About ToO analysis.

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Sources found so far

So far 7 sources have been found in the XRT data. 5 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from LAT pos	Exposure	Notes
1 [details]	01h 13m 24.50s18.35208°	+29° 58′ 13.7″29.97046°	5.2′′	Good	15.9′	0 s	Matches known X-ray source: 2SXPS J011324.1+295813 (from 2SXPS), 4.2″ away. Matches SIMBAD source: 4C 29.02, 4.1″ away.
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	01h 14m 24.47s18.60194°	+29° 51′ 43.4″29.86205°	4.9′′	Good	4.6′	4.7 ks	Matches SIMBAD source: TYC 1753-497-1, 5″ away.
Mean XRT rate: 4.9 (±1.4) ×10^-3 ct s^-1 Peak XRT rate: 4.9 (±1.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.2 (±0.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.2 (±0.3) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
3 [details]	01h 14m 08.61s18.53587°	+29° 47′ 52.7″29.79798°	2.7′′	Good	2.1′	4.7 ks
Mean XRT rate: 3.7 (±0.3) ×10^-2 ct s^-1 Peak XRT rate: 6.4 (±1.7) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.73 (±0.16) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 3.0 (±0.8) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
4 [details]	01h 13m 46.20s18.44251°	+29° 45′ 32.7″29.75909°	6.3′′	Poor	7.1′	4.7 ks	Matches SIMBAD source: SDSS J011346.02+294530.1, 3.4″ away.
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: undetermined erg cm^-1s^-1 Peak XRT flux: undetermined erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
5 [details]	01h 13m 32.93s18.38721°	+29° 44′ 09.3″29.73592°	2.7′′	Good	10.3′	4.7 ks	This source may be affected by optical loading Matches SIMBAD source: HD 7299, 2.8″ away.
Mean XRT rate: 2.57 (±0.30) ×10^-2 ct s^-1 Peak XRT rate: 2.8 (±0.6) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.4 (±0.6) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 5.9 (±1.2) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
6 [details]	01h 13m 50.91s18.46212°	+29° 40′ 10.7″29.66965°	5.2′′	Poor	9.3′	4.7 ks
Mean XRT rate: 3.1 (+1.3, -1.0) ×10^-3 ct s^-1 Peak XRT rate: 3.1 (+1.3, -1.0) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
7 [details]	01h 15m 00.52s18.75215°	+29° 43′ 05.1″29.71807°	11.9′′	Poor	10.2′	1.5 ks	Matches SIMBAD source: NVSS J011459+294302, 9.9″ away.
Mean XRT rate: 4.0 (+3.1, -2.1) ×10^-3 ct s^-1 Peak XRT rate: 4.0 (+3.1, -2.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the 1SXPS documentation.
^* 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.