GRB 181222B: Swift observation summary

Mission:	Fermi+MASTER
GRB RA:	312.371°
GRB Dec:	+24.962°
GRB Err:	60 arcsec
T0:	2018-12-22 20:11:32 UT
Galactic:	69.22° -11.83°
Galactic N_H:	1.03× 10²¹ cm^-2
Galactic E(B-V):	0.1969605

Sun distance:	62.84°
Sun angle:	2.76 [hr] (East of Sun)
Moon distance:	119.69°
Visibility of this field.

Data analysed so far:

ObsID: 00020850001 with 3.9 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 2 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Fermi+MASTER pos	Exposure
1 [details]	20h 49m 52.88s312.47034°	+25° 02′ 30.9″25.04193°	2.5′′	Good	7.2′	3.9 ks
Mean XRT rate: 9.9 (+2.0, -1.9) ×10^-3 ct s^-1 Peak XRT rate: 1.5 (+0.5, -0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.3 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.41 (+1.11, -0.91) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.07 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-11.83°
2 [details]	20h 49m 28.81s312.37005°	+24° 58′ 37.0″24.97694°	7.7′′	Good	0.9′	3.9 ks
Mean XRT rate: 3.03 (+1.21, -0.97) ×10^-3 ct s^-1 Peak XRT rate: 3.03 (+1.21, -0.97) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.2 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.2 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~7.19×10^-3 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-11.83°

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.