GRB 220426A: Swift observation summary

Mission:	IPN
GRB RA:	338.195°
GRB Dec:	-22.925°
GRB Err:	1.0 deg
T0:	2022-04-26 06:49:51 UT
Galactic:	32.79° -58.41°
Galactic N_H:	1.99× 10²⁰ cm^-2
Galactic E(B-V):	0.02949848

Sun distance:	65.43°
Sun angle:	3.7 [hr] (West of Sun)
Moon distance:	12.85°
Visibility of this field.

About tiled field analysis.

So far 3 fields have been scheduled for observations. Data are available and processed for 3 of these. The list gives the exposure time used in source detection. If any individual sources were selected for follow-up observations, the source detection is not repeated for the follow up observations and the table below is not updated.

21487 — 992 s of cleaned data taken between 2022-04-28 03:39:32 and 2022-04-28 03:59:39
21488 — 987 s of cleaned data taken between 2022-04-28 03:59:41 and 2022-04-28 04:16:31
21489 — 1.0 ks of cleaned data taken between 2022-04-28 05:32:29 and 2022-04-28 05:51:10

Find an upper limit.

Sources found so far

So far 4 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from IPN pos	Exposure
1 [details]	22h 34m 19.51s338.58129°	-23° 08′ 56.2″-23.14895°	8.6′′	Poor	25.2′	987 s
Mean XRT rate: 10 (+5, -4) ×10^-3 ct s^-1 Peak XRT rate: 10 (+5, -4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate)
2 [details]	22h 31m 56.53s337.98555°	-22° 58′ 35.3″-22.97648°	10.8′′	Poor	12.0′	2.2 ks
Mean XRT rate: 8 (+5, -4) ×10^-3 ct s^-1 Peak XRT rate: 8 (+5, -4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate)
3 [details]	22h 32m 11.18s338.04660°	-23° 05′ 31.5″-23.09209°	8.2′′	Poor	12.9′	2.2 ks
Mean XRT rate: 1.1 (+0.5, -0.4) ×10^-2 ct s^-1 Peak XRT rate: 1.1 (+0.5, -0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate)
4 [details]	22h 32m 34.31s338.14297°	-22° 57′ 02.6″-22.95073°	2.8′′	Good	3.3′	5.8 ks
Mean XRT rate: 1.06 (+0.17, -0.16) ×10^-2 ct s^-1 Peak XRT rate: 1.4 (+0.5, -0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.06 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.1 (±0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 4.0 (+1.4, -1.2) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position Expected serendipitous sources: ~0.5 [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.