GRB 240109A: Swift observation summary

Mission:	Swift-BAT
GRB RA:	301.318°
GRB Dec:	+16.578°
GRB Err:	3.0 arcmin
T0:	2024-01-09 04:01:34 UT
Galactic:	56.27° -8.05°
Galactic N_H:	1.95× 10²¹ cm^-2
Galactic E(B-V):	0.2874484

Sun distance:	40.48°
Sun angle:	0.78 [hr] (East of Sun)
Moon distance:	62.22°
Visibility of this field.

Data analysed so far:

ObsID: 01207446001 with 4.7 ks exposure.

About ToO analysis.

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Sources found so far

So far 7 sources have been found in the XRT data. 2 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift-BAT pos	Exposure	Notes
1 [details]	20h 05m 26.81s301.36171°	+16° 32′ 20.8″16.53911°	8.6′′	Good	3.4′	4.7 ks
Mean XRT rate: 1.8 (+0.9, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 1.8 (+0.9, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 1.41 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.8 (+3.0, -2.3) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.8 (+3.0, -2.3) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-8.05°
2 [details]	20h 06m 04.18s301.51743°	+16° 33′ 27.3″16.55758°	9.6′′	Good	11.5′	3.3 ks	Matches SIMBAD source: HD 354778, 2.7″ away.
Mean XRT rate: 4.4 (+1.8, -1.4) ×10^-3 ct s^-1 Peak XRT rate: 4.4 (+1.8, -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: 6.7 (+2.7, -2.2) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 6.7 (+2.7, -2.2) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-8.05°
3 [details]	20h 04m 45.45s301.18936°	+16° 36′ 20.7″16.60575°	6.6′′	Good	7.6′	4.7 ks
Mean XRT rate: 2.93 (+1.22, -0.98) ×10^-3 ct s^-1 Peak XRT rate: 2.93 (+1.22, -0.98) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) 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: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-8.05°
4 [details]	20h 04m 40.35s301.16814°	+16° 27′ 14.6″16.45406°	8.6′′	Good	11.4′	1.3 ks	Matches known X-ray source: 2RXP J200439.8+162719 (from ROSAT/ROSPSPC), 9.8″ away. Matches SIMBAD source: HD 354645, 5.1″ away.
Mean XRT rate: 2.4 (±0.5) ×10^-2 ct s^-1 Peak XRT rate: 2.4 (±0.5) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.2 (±1.2) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 5.2 (±1.2) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-8.05°
5 [details]	20h 05m 47.75s301.44895°	+16° 39′ 43.7″16.66214°	6.1′′	Good	9.1′	4.7 ks
Mean XRT rate: 1.4 (+0.9, -0.6) ×10^-3 ct s^-1 Peak XRT rate: 1.4 (+0.9, -0.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.08 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.6 (+2.2, -1.6) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 3.6 (+2.2, -1.6) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-8.05°
6 [details]	20h 05m 36.60s301.40250°	+16° 36′ 07.9″16.60219°	6.7′′	Good	5.1′	4.7 ks
Mean XRT rate: 2.1 (+1.0, -0.8) ×10^-3 ct s^-1 Peak XRT rate: 2.1 (+1.0, -0.8) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.6 (+2.7, -2.1) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.6 (+2.7, -2.1) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-8.05°
7 [details]	20h 05m 11.98s301.29993°	+16° 26′ 17.7″16.43826°	7.0′′	Poor	8.4′	4.7 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 (XRT equiv count-rate) Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-8.05°

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.