GRB 251115A: Swift observation summary

Mission:	Fermi/LAT
GRB RA:	330.175°
GRB Dec:	-9.181°
GRB Err:	22.8 arcmin
T0:	2025-11-15 03:20:02 UT
Galactic:	48.69° -45.94°
Galactic N_H:	3.56× 10²⁰ cm^-2
Galactic E(B-V):	0.03813078

Sun distance:	96.37°
Sun angle:	6.66 [hr] (East of Sun)
Moon distance:	152.59°
Visibility of this field.
First slew:	2025-11-15 13:11:27 UT
First observation:	2025-11-15 13:10:55 UT
First analysis:	UT

About tiled field analysis.

So far 5 fields have been scheduled for observations. Data are available and processed for 5 of these. The list gives the exposure time used in source detection. If any individual sources were selected for follow-up observations, the source detection is not repeated for the follow up observations and the table below is not updated.

21874 — 1.1 ks of cleaned data taken between 2025-11-15 13:11:23 and 2025-11-15 13:31:12
21879 — 1.0 ks of cleaned data taken between 2025-11-15 13:31:12 and 2025-11-15 14:56:00
21880 — 915 s of cleaned data taken between 2025-11-15 14:56:03 and 2025-11-15 21:24:45
21881 — 824 s of cleaned data taken between 2025-11-15 22:21:25 and 2025-11-16 00:04:55
21882 — 1.1 ks of cleaned data taken between 2025-11-15 22:52:24 and 2025-11-16 01:35:15

Find an upper limit.

Sources found so far

So far 7 sources have been found in the XRT data. 1 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from LAT pos	Exposure	Notes
1 [details]	22h 00m 42.06s330.17527°	-09° 21′ 51.7″-9.36435°	8.5′′	Poor	11.0′	1.9 ks
Mean XRT rate: 3.7 (+2.2, -1.6) ×10^-3 ct s^-1 Peak XRT rate: 3.7 (+2.2, -1.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Spectrum
2 [details]	22h 00m 16.38s330.06826°	-09° 28′ 05.0″-9.46806°	8.6′′	Poor	18.3′	1.0 ks
Mean XRT rate: 6.2 (+3.9, -2.8) ×10^-3 ct s^-1 Peak XRT rate: 6.2 (+3.9, -2.8) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Spectrum
3 [details]	22h 00m 12.72s330.05298°	-09° 11′ 51.3″-9.19758°	5.8′′	Good	7.3′	2.1 ks
Mean XRT rate: 4.3 (+2.3, -1.7) ×10^-3 ct s^-1 Peak XRT rate: 4.3 (+2.3, -1.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 19.38 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.26 (+1.23, -0.91) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.26 (+1.23, -0.91) ×10^-13 erg cm^-1s^-1 Products: Spectrum
4 [details]	22h 00m 51.06s330.21274°	-09° 09′ 38.9″-9.16081°	14.1′′	Reasonable	2.5′	1.1 ks
Mean XRT rate: 10 (+4, -3) ×10^-3 ct s^-1 Peak XRT rate: 10 (+4, -3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.6 (+1.6, -1.2) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.6 (+1.6, -1.2) ×10^-13 erg cm^-1s^-1 Products: Spectrum
5 [details]	22h 01m 43.76s330.43235°	-09° 25′ 16.0″-9.42110°	5.6′′	Good	21.0′	915 s	Matches known X-ray source: XMMSL3 J220143.5-092512 (from XMM-NEWTON/XMMSLEWCLN), 5.7″ away. Matches SIMBAD source: RX J2201.7-0925B, 5.7″ away.
Mean XRT rate: 2.7 (±0.7) ×10^-2 ct s^-1 Peak XRT rate: 2.7 (±0.7) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.1 (±1.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 5.1 (±1.3) ×10^-13 erg cm^-1s^-1 Products: Spectrum
6 [details]	21h 59m 05.69s329.77371°	-08° 53′ 47.2″-8.89645°	5.6′′	Good	29.3′	824 s
Mean XRT rate: 1.1 (+0.5, -0.4) ×10^-2 ct s^-1 Peak XRT rate: 1.1 (+0.5, -0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.5 (+2.2, -1.7) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 4.5 (+2.2, -1.7) ×10^-13 erg cm^-1s^-1 Products: Spectrum
7 [details]	21h 59m 33.40s329.88918°	-08° 59′ 39.8″-8.99440°	6.6′′	Poor	20.3′	824 s
Mean XRT rate: 1.0 (+0.5, -0.4) ×10^-2 ct s^-1 Peak XRT rate: 1.0 (+0.5, -0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.63 (+1.28, -0.99) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.63 (+1.28, -0.99) ×10^-13 erg cm^-1s^-1 Products: Spectrum

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.

Image

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FITS image.

Exposure map

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FITS exposure map.