GRB 240727B: Swift observation summary

Mission:	Fermi/GBM
GRB RA:	97.786°
GRB Dec:	-37.180°
GRB Err:	3.0 arcmin
T0:	2024-07-27 06:00:09 UT
Galactic:	245.44° -19.77°
Galactic N_H:	7.65× 10²⁰ cm^-2
Galactic E(B-V):	0.09050684

Sun distance:	62.59°
Sun angle:	1.94 [hr](West of Sun)
Moon distance:	85.97°
Visibility of this field.

Data analysed so far:

ObsID: 00021701001 with 4.9 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 3 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]	06h 31m 17.89s97.82453°	-37° 20′ 51.8″-37.34773°	5.0′′	Good	10.2′	4.9 ks
Mean XRT rate: 6.6 (±1.7) ×10^-3 ct s^-1 Peak XRT rate: 6.6 (±1.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.4 (±0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.4 (±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=-19.77°
2 [details]	06h 31m 25.73s97.85722°	-37° 00′ 50.4″-37.01400°	6.6′′	Reasonable	10.5′	4.9 ks
Mean XRT rate: 1.7 (+1.0, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 1.7 (+1.0, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 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=-19.77°
3 [details]	06h 31m 49.13s97.95470°	-37° 14′ 13.3″-37.23704°	10.2′′	Poor	8.8′	4.9 ks
Mean XRT rate: 1.5 (+0.9, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 1.5 (+0.9, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 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=-19.77°

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.