GRB 260208A: Swift observation summary

Mission:	Fermi/LAT
GRB RA:	204.732°
GRB Dec:	+33.802°
GRB Err:	9.0 arcmin
T0:	2026-02-08 05:07:28 UT
Galactic:	68.96° +77.80°
Galactic N_H:	9.44× 10¹⁹ cm^-2
Galactic E(B-V):	0.01236602

Sun distance:	120.42°
Sun angle:	7.79 [hr](West of Sun)
Moon distance:	51.29°
Visibility of this field.

Data analysed so far:

ObsID: 00021908001 with 4.8 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 9 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]	13h 38m 55.58s204.73158°	+33° 48′ 04.5″33.80126°	2.5′′	Good	2.9′′	4.8 ks
Mean XRT rate: 5.1 (±0.5) ×10^-2 ct s^-1 Peak XRT rate: 8.8 (±2.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.67 (±0.15) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 2.9 (±0.8) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	13h 39m 31.38s204.88074°	+33° 44′ 21.6″33.73933°	8.6′′	Good	8.3′	4.8 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) Products: Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
3 [details]	13h 38m 07.01s204.52922°	+33° 41′ 57.0″33.69916°	8.3′′	Reasonable	11.8′	1.4 ks	Matches SIMBAD source: SDSS J133807.54+334200.1, 7.3″ away.
Mean XRT rate: 4.6 (+3.6, -2.4) ×10^-3 ct s^-1 Peak XRT rate: 4.6 (+3.6, -2.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
4 [details]	13h 38m 26.76s204.61152°	+33° 41′ 50.2″33.69729°	5.2′′	Poor	8.7′	4.8 ks	Matches SIMBAD source: [SPD2011] 8501, 5.2″ away.
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: Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
5 [details]	13h 39m 02.61s204.76088°	+33° 46′ 13.8″33.77050°	6.3′′	Poor	2.4′	4.8 ks	Matches SIMBAD source: SDSS J133903.94+334621.4, 18.2″ away.
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: Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
6 [details]	13h 39m 23.77s204.84906°	+33° 48′ 01.5″33.80041°	6.2′′	Reasonable	5.8′	4.8 ks	Matches SIMBAD source: NGP9 F270-1239109, 12.6″ away.
Mean XRT rate: 5.3 (±2.1) ×10^-3 ct s^-1 Peak XRT rate: 5.3 (±2.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Products: Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
7 [details]	13h 38m 21.25s204.58853°	+33° 56′ 30.8″33.94190°	4.3′′	Poor	11.0′	4.8 ks
Mean XRT rate: 1.4 (±0.4) ×10^-2 ct s^-1 Peak XRT rate: 2.9 (±1.0) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 7.0×10^-4 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.3 (±1.1) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 9 (±3) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
8 [details]	13h 38m 57.60s204.74000°	+33° 57′ 17.1″33.95475°	8.6′′	Poor	9.2′	4.8 ks	Matches SIMBAD source: SDSS J133857.71+335716.2, 1.7″ away.
Mean XRT rate: 4.2 (+2.0, -1.7) ×10^-3 ct s^-1 Peak XRT rate: 4.2 (+2.0, -1.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 8.8×10^-4 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.1 (±0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.1 (±0.5) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
9 [details]	13h 38m 57.19s204.73828°	+33° 59′ 20.3″33.98898°	4.6′′	Poor	11.2′	4.8 ks
Mean XRT rate: 6.2 (±2.2) ×10^-3 ct s^-1 Peak XRT rate: 6.2 (±2.2) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Products: Enhanced position \| 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

Select image style: Draggable PNG | JS9.

Magnify image and make scrollable?

FITS image.

Exposure map

Magnify exposure map and make scrollable?

FITS exposure map.