GRB 250114B: Swift observation summary

Mission:	INTEGRAL
GRB RA:	48.877°
GRB Dec:	-2.307°
GRB Err:	2.0 arcmin
T0:	2025-01-14 13:15:36 UT
Galactic:	183.41° -47.53°
Galactic N_H:	5.73× 10²⁰ cm^-2
Galactic E(B-V):	0.08340038

Sun distance:	110.17°
Sun angle:	7.51 [hr](East of Sun)
Moon distance:	78.47°
Visibility of this field.

Data analysed so far:

ObsID: 00021756001 with 3.2 ks exposure.
ObsID: 00021756002 with 2.2 ks exposure.
ObsID: 00021756003 with 4.5 ks exposure.

Source 2 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.

Find an upper limit.

Sources found so far

So far 17 sources have been found in the XRT data. 12 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from INTEGRAL pos	Exposure	Notes
1 [details]	03h 14m 47.45s48.69773°	-02° 15′ 06.8″-2.25190°	6.7′′	Good	11.2′	9.8 ks	Matches SIMBAD source: ACT-CL J0314.7-0215, 10.4″ away.
Mean XRT rate: 6.6 (±1.1) ×10^-3 ct s^-1 Peak XRT rate: 8.8 (±2.2) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.9 (±0.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.5 (±0.6) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	03h 15m 25.96s48.85818°	-02° 17′ 38.2″-2.29396°	7.6′′	Good	1.4′	9.8 ks
Mean XRT rate: 2.61 (+1.04, -0.84) ×10^-3 ct s^-1 Peak XRT rate: 2.61 (+1.04, -0.84) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.07 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.5 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.5 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
3 [details]	03h 15m 46.26s48.94275°	-02° 18′ 54.2″-2.31505°	7.5′′	Good	4.0′	9.8 ks	Matches known X-ray source: 2SXPS J031545.9-021847 (from 2SXPS), 8.1″ away.
Mean XRT rate: 2.4 (+0.7, -0.6) ×10^-3 ct s^-1 Peak XRT rate: 2.5 (+1.0, -0.8) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 7.9 (+2.4, -1.9) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 8.3 (+3.2, -2.6) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
4 [details]	03h 16m 02.15s49.00896°	-02° 24′ 02.4″-2.40066°	6.6′′	Poor	9.7′	9.8 ks	Matches known X-ray source: 2SXPS J031601.6-022404 (from 2SXPS), 8″ away. Matches SIMBAD source: NuSTAR J031602-0224.1, 4.6″ away.
Mean XRT rate: 2.1 (+0.8, -0.6) ×10^-3 ct s^-1 Peak XRT rate: 2.53 (+1.16, -0.90) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.0 (+1.8, -1.4) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.9 (+2.7, -2.1) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
5 [details]	03h 15m 37.78s48.90740°	-02° 24′ 35.1″-2.40974°	5.7′′	Poor	6.4′	9.8 ks	This source may be affected by extended emission Matches known X-ray source: 4XMM J031537.7-022432 (from XMM-NEWTON/XMMSSC), 2.3″ away.
Mean XRT rate: 2.39 (+1.14, -0.88) ×10^-3 ct s^-1 Peak XRT rate: 2.39 (+1.14, -0.88) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.0 (+2.4, -1.8) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.0 (+2.4, -1.8) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
6 [details]	03h 15m 58.24s48.99267°	-02° 27′ 46.0″-2.46278°	7.7′′	Poor	11.6′	4.6 ks	Matches known X-ray source: 2SXPS J031558.5-022745 (from 2SXPS), 4.4″ away.
Mean XRT rate: 3.3 (+1.4, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 3.3 (+1.4, -1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 6.1 (+2.7, -2.1) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 6.1 (+2.7, -2.1) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
7 [details]	03h 16m 01.18s49.00492°	-02° 25′ 37.3″-2.42703°	5.2′′	Good	10.5′	8.6 ks	Matches known X-ray source: 2SXPS J031600.8-022538 (from 2SXPS), 5.9″ away. Matches SIMBAD source: NGC 1266, 6.1″ away.
Mean XRT rate: 5.7 (+1.2, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 6.0 (±1.5) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.16 (+0.25, -0.23) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.2 (±0.3) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
8 [details]	03h 15m 16.75s48.81978°	-02° 08′ 14.4″-2.13732°	8.2′′	Poor	10.7′	9.8 ks
Mean XRT rate: 1.7 (+0.7, -0.5) ×10^-3 ct s^-1 Peak XRT rate: 2.11 (+1.01, -0.77) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 7.6 (+3.1, -2.2) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 9 (+5, -3) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
9 [details]	03h 14m 35.98s48.64992°	-02° 19′ 59.2″-2.33310°	4.0′′	Good	13.7′	2.8 ks	This source may be affected by optical loading Matches SIMBAD source: HD 20196, 3.7″ away.
Mean XRT rate: 4.2 (±1.1) ×10^-2 ct s^-1 Peak XRT rate: 4.2 (±1.1) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
10 [details]	03h 15m 07.22s48.78007°	-02° 25′ 09.0″-2.41918°	8.3′′	Good	8.9′	9.8 ks	Matches known X-ray source: 4XMM J031507.2-022507 (from XMM-NEWTON/XMMSSC), 1.9″ away.
Mean XRT rate: 2.2 (+0.8, -0.6) ×10^-3 ct s^-1 Peak XRT rate: 2.69 (+1.15, -0.91) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.6 (+1.6, -1.2) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.5 (+2.3, -1.8) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
11 [details]	03h 15m 39.74s48.91558°	-02° 24′ 58.5″-2.41625°	5.9′′	Good	7.0′	9.8 ks	This source may be affected by extended emission Matches known X-ray source: 2SXPS J031539.7-022459 (from 2SXPS), 1″ away.
Mean XRT rate: 3.61 (+1.07, -0.85) ×10^-3 ct s^-1 Peak XRT rate: 3.8 (+1.7, -1.3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.0 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.0 (+0.9, -0.7) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
12 [details]	03h 15m 22.47s48.84362°	-02° 13′ 17.0″-2.22138°	6.4′′	Poor	5.5′	9.8 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) 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?]
13 [details]	03h 15m 23.14s48.84643°	-02° 10′ 08.5″-2.16903°	6.5′′	Poor	8.5′	9.8 ks
Mean XRT rate: 1.1 (+0.6, -0.4) ×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: 2.53 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 9 (+5, -3) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.2 (+0.8, -0.5) ×10^-11 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
14 [details]	03h 14m 46.58s48.69410°	-02° 21′ 49.2″-2.36368°	6.4′′	Poor	11.5′	7.9 ks
Mean XRT rate: 1.98 (+1.06, -0.78) ×10^-3 ct s^-1 Peak XRT rate: 1.98 (+1.06, -0.78) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 8.2×10^-3 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.5 (+2.4, -1.8) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.5 (+2.4, -1.8) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
15 [details]	03h 15m 35.53s48.89806°	-02° 19′ 05.0″-2.31807°	6.2′′	Good	1.4′	9.8 ks	Matches known X-ray source: 2SXPS J031535.3-021908 (from 2SXPS), 4.1″ away.
Mean XRT rate: 2.68 (+1.16, -0.93) ×10^-3 ct s^-1 Peak XRT rate: 2.68 (+1.16, -0.93) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.9 (+1.3, -1.0) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.9 (+1.3, -1.0) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
16 [details]	03h 15m 49.73s48.95719°	-02° 17′ 49.8″-2.29718°	7.1′′	Poor	4.8′	9.8 ks	Matches known X-ray source: 4XMM J031549.9-021753 (from XMM-NEWTON/XMMSSC), 4.9″ 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) 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?]
17 [details]	03h 15m 21.55s48.83980°	-02° 27′ 33.4″-2.45927°	6.7′′	Reasonable	9.4′	9.8 ks	Matches known X-ray source: 2SXPS J031521.6-022732 (from 2SXPS), 1.3″ away.
Mean XRT rate: 1.2 (+0.6, -0.4) ×10^-3 ct s^-1 Peak XRT rate: 1.3 (+0.8, -0.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 7.7 (+3.8, -2.6) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 8 (+5, -4) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| 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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FITS exposure map.