GRB 220218A: Swift observation summary

Mission:	Swift-BAT
GRB RA:	133.830°
GRB Dec:	+31.984°
GRB Err:	3.0 arcmin
T0:	2022-02-18 22:28:59 UT
Galactic:	192.40° +39.05°
Galactic N_H:	2.01× 10²⁰ cm^-2
Galactic E(B-V):	0.02642723

Sun distance:	153.27°
Sun angle:	10.77 [hr](East of Sun)
Moon distance:	49.99°
Visibility of this field.

Data analysed so far:

ObsID: 01093860002 with 3.9 ks exposure.
ObsID: 01093860003 with 4.3 ks exposure.
ObsID: 01093860004 with 4.5 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 16 sources have been found in the XRT data. 4 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift-BAT pos	Exposure	Notes
1 [details]	08h 55m 04.94s133.77060°	+31° 51′ 48.0″31.86332°	7.3′′	Good	7.8′	12.7 ks
Mean XRT rate: 2.6 (+0.7, -0.6) ×10^-3 ct s^-1 Peak XRT rate: 3.2 (+1.4, -1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.37 (+0.37, -0.30) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.7 (+0.7, -0.6) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.7 [What is this?]
2 [details]	08h 54m 33.55s133.63979°	+31° 58′ 01.5″31.96709°	6.9′′	Reasonable	9.7′	12.7 ks
Mean XRT rate: 2.06 (+1.10, -0.84) ×10^-3 ct s^-1 Peak XRT rate: 2.06 (+1.10, -0.84) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.07 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.8 (+2.6, -2.0) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.8 (+2.6, -2.0) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~1.4 [What is this?]
3 [details]	08h 55m 24.48s133.85199°	+31° 59′ 35.6″31.99321°	7.0′′	Poor	1.2′	12.7 ks	Matches SIMBAD source: SDSS J085523.95+315934.6, 6.7″ away.
Mean XRT rate: 1.94 (+1.13, -0.83) ×10^-3 ct s^-1 Peak XRT rate: 1.94 (+1.13, -0.83) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~0.1 [What is this?]
4 [details]	08h 55m 15.63s133.81514°	+31° 58′ 44.3″31.97897°	6.3′′	Good	0.8′	12.7 ks
Mean XRT rate: 1.5 (+0.5, -0.4) ×10^-3 ct s^-1 Peak XRT rate: 2.79 (+1.24, -0.98) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.08 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 7.2 (+2.5, -1.9) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 1.4 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.2 [What is this?]
5 [details]	08h 54m 43.98s133.68325°	+31° 56′ 55.4″31.94872°	6.2′′	Poor	7.8′	12.7 ks
Mean XRT rate: 1.98 (+1.20, -0.88) ×10^-3 ct s^-1 Peak XRT rate: 1.98 (+1.20, -0.88) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~1.0 [What is this?]
6 [details]	08h 55m 16.17s133.81736°	+31° 57′ 59.7″31.96658°	7.3′′	Poor	1.2′	12.7 ks	This source may be affected by extended emission
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 0.05 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?]
7 [details]	08h 54m 50.00s133.70833°	+32° 06′ 56.3″32.11564°	6.3′′	Reasonable	10.0′	12.7 ks	Matches SIMBAD source: SDSS J085449.76+320652.3, 4.9″ away.
Mean XRT rate: 1.7 (+0.6, -0.4) ×10^-3 ct s^-1 Peak XRT rate: 1.8 (+0.7, -0.5) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~2.0 [What is this?]
8 [details]	08h 54m 35.39s133.64747°	+31° 51′ 34.2″31.85951°	8.7′′	Poor	11.9′	12.7 ks
Mean XRT rate: 2.39 (+1.32, -0.98) ×10^-3 ct s^-1 Peak XRT rate: 2.39 (+1.32, -0.98) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~1.7 [What is this?]
9 [details]	08h 55m 15.90s133.81626°	+31° 55′ 42.4″31.92846°	7.5′′	Good	3.4′	12.7 ks
Mean XRT rate: 1.8 (+0.6, -0.5) ×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: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.2 (+1.4, -1.1) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.2 (+1.7, -1.4) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.2 [What is this?]
10 [details]	08h 55m 16.67s133.81948°	+31° 54′ 42.8″31.91188°	7.6′′	Reasonable	4.4′	12.7 ks
Mean XRT rate: 1.8 (+0.7, -0.6) ×10^-3 ct s^-1 Peak XRT rate: 1.8 (+0.7, -0.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.6 (+2.2, -1.8) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.6 (+2.2, -1.8) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
11 [details]	08h 54m 56.25s133.73438°	+32° 07′ 45.9″32.12942°	6.6′′	Poor	10.0′	12.7 ks
Mean XRT rate: 8 (+5, -4) ×10^-4 ct s^-1 Peak XRT rate: 8 (+5, -4) ×10^-4 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~5.9 [What is this?]
12 [details]	08h 54m 42.37s133.67656°	+32° 00′ 05.2″32.00144°	4.8′′	Good	7.9′	12.7 ks	Matches SIMBAD source: HD 76035, 1.3″ away.
Mean XRT rate: 1.0 (+0.5, -0.4) ×10^-3 ct s^-1 Peak XRT rate: 1.0 (+0.5, -0.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~2.5 [What is this?]
13 [details]	08h 54m 39.92s133.66635°	+31° 56′ 42.3″31.94509°	5.9′′	Poor	8.7′	12.7 ks
Mean XRT rate: 9 (+5, -4) ×10^-4 ct s^-1 Peak XRT rate: 9 (+5, -4) ×10^-4 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.4 (+1.4, -1.1) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 2.4 (+1.4, -1.1) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
14 [details]	08h 54m 50.78s133.71158°	+32° 05′ 22.3″32.08953°	5.8′′	Good	8.7′	12.7 ks	Matches SIMBAD source: [VV2006] J085450.5+320518, 5.3″ away.
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: 0.07 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.8 (+2.3, -1.8) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.8 (+2.3, -1.8) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~1.7 [What is this?]
15 [details]	08h 55m 27.19s133.86329°	+32° 01′ 37.8″32.02717°	6.1′′	Poor	3.1′	12.7 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined 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?]
16 [details]	08h 55m 11.50s133.79792°	+32° 03′ 30.1″32.05836°	8.1′′	Reasonable	4.8′	12.7 ks
Mean XRT rate: 8 (+5, -4) ×10^-4 ct s^-1 Peak XRT rate: 8 (+5, -4) ×10^-4 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Expected serendipitous sources: ~1.2 [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.

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FITS exposure map.