GRB 240905B: Swift observation summary

Mission:	Fermi/LAT
GRB RA:	268.000°
GRB Dec:	+14.200°
GRB Err:	12.0 arcmin
T0:	2024-09-05 04:27:16 UT
Galactic:	39.32° +19.46°
Galactic N_H:	6.85× 10²⁰ cm^-2
Galactic E(B-V):	0.1075373

Sun distance:	101.66°
Sun angle:	6.92 [hr] (East of Sun)
Moon distance:	83.53°
Visibility of this field.

Data analysed so far:

ObsID: 00021711001 with 4.7 ks exposure.

About ToO analysis.

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Sources found so far

So far 6 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]	17h 51m 51.66s267.96527°	+14° 19′ 52.5″14.33126°	4.2′′	Good	8.1′	10.3 ks
Mean XRT rate: 7.4 (+1.2, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 7.8 (±1.9) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.09 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.67 (+0.27, -0.26) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.8 (±0.4) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=19.46°
2 [details]	17h 51m 29.15s267.87144°	+14° 10′ 20.6″14.17240°	6.1′′	Good	7.7′	10.3 ks
Mean XRT rate: 2.45 (+1.16, -0.91) ×10^-3 ct s^-1 Peak XRT rate: 2.45 (+1.16, -0.91) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.07 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=19.46°
3 [details]	17h 52m 12.75s268.05311°	+14° 07′ 01.9″14.11720°	6.3′′	Poor	5.9′	10.3 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.06 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?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=19.46°
4 [details]	17h 52m 24.47s268.10195°	+14° 02′ 10.2″14.03617°	6.5′′	Good	11.5′	5.8 ks
Mean XRT rate: 4.5 (+1.5, -1.3) ×10^-3 ct s^-1 Peak XRT rate: 4.5 (+1.5, -1.3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.15 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.1 (+0.4, -0.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.1 (+0.4, -0.3) ×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=19.46°
5 [details]	17h 52m 12.56s268.05235°	+14° 15′ 11.5″14.25319°	5.9′′	Poor	4.4′	10.3 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.12 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=19.46°
6 [details]	17h 51m 50.74s267.96141°	+14° 13′ 51.0″14.23084°	7.4′′	Poor	2.9′	10.3 ks	Matches SIMBAD source: TYC 1006-1919-1, 4.7″ away.
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.09 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?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=19.46°

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 image.

Exposure map

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FITS exposure map.