GRB 230911A: Swift observation summary

Mission:	Fermi/GBM
GRB RA:	57.502°
GRB Dec:	-29.825°
GRB Err:	1.2 arcsec
T0:	2023-09-11 03:09:32 UT
Galactic:	227.74° -50.91°
Galactic N_H:	9.75× 10¹⁹ cm^-2
Galactic E(B-V):	0.0105385

Sun distance:	110.84°
Sun angle:	7.42 [hr](West of Sun)
Moon distance:	86.86°
Visibility of this field.

Data analysed so far:

ObsID: 00021622001 with 0.2 ks exposure.
ObsID: 00021622002 with 2.6 ks exposure.

Source 1 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.

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Sources found so far

So far 2 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 50m 00.65s57.50272°	-29° 49′ 33.2″-29.82589°	3.4′′	Good	3.9′′	2.8 ks
Mean XRT rate: 7.8 (±2.1) ×10^-3 ct s^-1 Peak XRT rate: 7.8 (±2.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.6 (±0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.6 (±0.4) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	03h 49m 42.59s57.42747°	-29° 51′ 15.8″-29.85440°	8.2′′	Good	4.3′	2.8 ks
Mean XRT rate: 3.0 (+1.5, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 3.0 (+1.5, -1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: 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.