GRB 220310C: Swift observation summary

Mission:	Swift/BAT-GUANO
GRB RA:	290.069°
GRB Dec:	+40.253°
GRB Err:	5.0 arcmin
T0:	2022-03-10 22:23:51 UT
Galactic:	72.19° +12.09°
Galactic N_H:	9.26× 10²⁰ cm^-2
Galactic E(B-V):	0.1159098

Sun distance:	71.00°
Sun angle:	4.07 [hr](West of Sun)
Moon distance:	109.81°
Visibility of this field.

Data analysed so far:

ObsID: 00021483001 with 4.6 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 4 sources have been found in the XRT data. 2 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift/BAT-GUANO pos	Exposure	Notes
1 [details]	19h 19m 49.91s289.95796°	+40° 12′ 33.3″40.20926°	7.9′′	Good	5.7′	4.6 ks	Matches SIMBAD source: 2MASS J19194960+4012268, 2.4″ away.
Mean XRT rate: 4.4 (±1.2) ×10^-3 ct s^-1 Peak XRT rate: 4.4 (±1.2) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 9.6 (±2.7) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 9.6 (±2.7) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.1 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=12.09°
2 [details]	19h 20m 56.50s290.23542°	+40° 19′ 59.9″40.33332°	7.6′′	Good	9.0′	4.6 ks	Matches SIMBAD source: 2MASS J19205619+4020026, 4.4″ away.
Mean XRT rate: 3.7 (+1.4, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 3.7 (+1.4, -1.1) ×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 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.4 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.4 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=12.09°
3 [details]	19h 20m 37.05s290.15437°	+40° 12′ 23.0″40.20640°	6.3′′	Reasonable	4.8′	4.6 ks
Mean XRT rate: 1.9 (+1.0, -0.8) ×10^-3 ct s^-1 Peak XRT rate: 1.9 (+1.0, -0.8) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.2 (+2.2, -1.7) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.2 (+2.2, -1.7) ×10^-14 erg cm^-1s^-1 Products: Spectrum \| Expected serendipitous sources: ~0.4 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=12.09°
4 [details]	19h 19m 29.46s289.87275°	+40° 15′ 26.0″40.25723°	6.4′′	Poor	9.0′	4.6 ks
Mean XRT rate: 1.4 (+1.0, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 1.4 (+1.0, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Products: Spectrum \| Expected serendipitous sources: ~0.6 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=12.09°

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.