GRB 251013D: Swift observation summary

Mission:	Fermi/GBM
GRB RA:	46.882°
GRB Dec:	+8.787°
GRB Err:	4.0 arcmin
T0:	2025-10-13 18:17:00 UT
Galactic:	170.28° -41.25°
Galactic N_H:	1.57× 10²¹ cm^-2
Galactic E(B-V):	0.3843735

Sun distance:	152.16°
Sun angle:	10.12 [hr](West of Sun)
Moon distance:	64.52°
Visibility of this field.

Data analysed so far:

ObsID: 00021861001 with 4.9 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 4 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Fermi/GBM pos	Exposure
1 [details]	03h 07m 34.05s46.89188°	+08° 47′ 09.2″8.78588°	5.6′′	Good	0.6′	4.9 ks
Mean XRT rate: 3.42 (+1.17, -0.97) ×10^-3 ct s^-1 Peak XRT rate: 3.42 (+1.17, -0.97) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.8 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.8 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	03h 07m 52.86s46.97027°	+08° 48′ 56.0″8.81555°	6.0′′	Good	5.5′	4.9 ks
Mean XRT rate: 2.0 (+1.0, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 2.0 (+1.0, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.2 (+1.5, -1.2) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 3.2 (+1.5, -1.2) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
3 [details]	03h 08m 13.24s47.05515°	+08° 51′ 51.1″8.86420°	8.7′′	Good	11.3′	4.9 ks
Mean XRT rate: 2.14 (+1.15, -0.87) ×10^-3 ct s^-1 Peak XRT rate: 2.14 (+1.15, -0.87) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 7.0 (+3.8, -2.9) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 7.0 (+3.8, -2.9) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
4 [details]	03h 07m 35.51s46.89797°	+08° 37′ 53.4″8.63149°	8.0′′	Reasonable	9.4′	4.9 ks
Mean XRT rate: 1.94 (+1.03, -0.78) ×10^-3 ct s^-1 Peak XRT rate: 1.94 (+1.03, -0.78) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.09 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.33 (+1.24, -0.94) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.33 (+1.24, -0.94) ×10^-13 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.

Image

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FITS image.

Exposure map

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FITS exposure map.