GRB 220831A: Swift observation summary

Mission:	Swift/BAT
GRB RA:	24.255°
GRB Dec:	-41.582°
GRB Err:	60 arcsec
T0:	2022-08-31 13:56:33 UT
Galactic:	272.96° -72.79°
Galactic N_H:	1.71× 10²⁰ cm^-2
Galactic E(B-V):	0.0161684

Sun distance:	128.67°
Sun angle:	9.02 [hr](West of Sun)
Moon distance:	129.07°
Visibility of this field.

Data analysed so far:

ObsID: 00021512001 with 5.0 ks exposure.
ObsID: 00021512002 with 4.9 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 11 sources have been found in the XRT data. 3 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift/BAT pos	Exposure	Notes
1 [details]	01h 36m 39.05s24.16271°	-41° 31′ 42.5″-41.52848°	5.7′′	Good	5.2′	9.9 ks	Matches SIMBAD source: GALEX 2676063997571106881, 3.5″ away.
Mean XRT rate: 7.3 (±1.1) ×10^-3 ct s^-1 Peak XRT rate: 9.8 (±2.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.8 (±0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.7 (±0.9) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
2 [details]	01h 36m 43.07s24.17945°	-41° 41′ 52.5″-41.69792°	5.1′′	Good	7.7′	9.1 ks	Matches known X-ray source: 2RXP J013644.8-414137 (from ROSAT/ROSPSPC), 24.4″ away. Matches SIMBAD source: UCAC2 13892736, 1.8″ away.
Mean XRT rate: 1.44 (+0.17, -0.16) ×10^-2 ct s^-1 Peak XRT rate: 1.6 (±0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.39 (+0.28, -0.27) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.7 (±0.6) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
3 [details]	01h 37m 28.73s24.36972°	-41° 30′ 50.7″-41.51407°	5.9′′	Reasonable	6.6′	9.9 ks
Mean XRT rate: 1.6 (+0.6, -0.5) ×10^-3 ct s^-1 Peak XRT rate: 1.6 (+0.6, -0.5) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.4 (+1.6, -1.3) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.4 (+1.6, -1.3) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
4 [details]	01h 37m 27.51s24.36464°	-41° 32′ 00.9″-41.53358°	7.2′′	Reasonable	5.7′	9.9 ks
Mean XRT rate: 3.9 (+0.9, -0.8) ×10^-3 ct s^-1 Peak XRT rate: 3.9 (±1.0) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.0 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.0 (±0.5) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
5 [details]	01h 37m 33.60s24.39002°	-41° 36′ 32.8″-41.60911°	6.5′′	Good	6.3′	9.9 ks
Mean XRT rate: 1.5 (+0.6, -0.5) ×10^-3 ct s^-1 Peak XRT rate: 1.5 (+0.6, -0.5) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.08 (+1.23, -0.99) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 3.08 (+1.23, -0.99) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
6 [details]	01h 37m 13.51s24.30629°	-41° 21′ 07.2″-41.35201°	8.1′′	Good	14.0′	3.1 ks
Mean XRT rate: 4.0 (+1.9, -1.4) ×10^-3 ct s^-1 Peak XRT rate: 4.0 (+1.9, -1.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.8 (+0.8, -0.7) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.8 (+0.8, -0.7) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
7 [details]	01h 36m 22.01s24.09170°	-41° 30′ 36.3″-41.51009°	6.8′′	Poor	8.5′	9.9 ks
Mean XRT rate: 1.7 (+0.7, -0.6) ×10^-3 ct s^-1 Peak XRT rate: 1.7 (+0.7, -0.6) ×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?]
8 [details]	01h 36m 47.14s24.19640°	-41° 22′ 55.6″-41.38211°	7.2′′	Good	12.3′	5.6 ks	Matches known X-ray source: 1WGA J0136.7-4123 (from ROSAT/WGACAT), 35.1″ away.
Mean XRT rate: 2.31 (+1.01, -0.79) ×10^-3 ct s^-1 Peak XRT rate: 2.31 (+1.01, -0.79) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.5 (+1.9, -1.5) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.5 (+1.9, -1.5) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
9 [details]	01h 36m 48.15s24.20062°	-41° 35′ 58.1″-41.59947°	6.1′′	Reasonable	2.7′	9.9 ks
Mean XRT rate: 1.2 (+0.5, -0.4) ×10^-3 ct s^-1 Peak XRT rate: 1.2 (+0.5, -0.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.08 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.1 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.1 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
10 [details]	01h 37m 46.67s24.44444°	-41° 41′ 03.1″-41.68420°	7.9′′	Good	10.5′	5.3 ks
Mean XRT rate: 1.8 (+0.9, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 1.8 (+0.9, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.5 (+2.4, -1.8) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.5 (+2.4, -1.8) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
11 [details]	01h 36m 31.32s24.13050°	-41° 34′ 53.1″-41.58141°	8.1′′	Poor	5.6′	9.9 ks
Mean XRT rate: 8 (+5, -3) ×10^-4 ct s^-1 Peak XRT rate: 8 (+5, -3) ×10^-4 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?]

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.