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GRB 210218A: Swift observation summary

Mission:Swift-BAT
GRB RA:47.291°
GRB Dec:+35.287°
GRB Err:3.0 arcmin
T0:2021-02-18 13:35:19 UT
Galactic:152.27° -19.62°
Galactic NH:1.13× 1021 cm-2
Galactic E(B-V):0.2044283
Sun distance:84.76°
Sun angle:5.01 [hr](East of Sun)
Moon distance:20.88°
Visibility of this field.
Data analysed so far:
  • ObsID: 01033328002 with 2.7 ks exposure.
  • ObsID: 01033328003 with 3.9 ks exposure.

Source 3 has been manually confirmed as the GRB afterglow; data for this object are now available through the main GRB results area for this GRB.

About ToO analysis.

Probable afterglow details

A source was found which matches the afterglow criteria.

# RA (J2000) Dec (J2000) Err901 Detection
Flag2
Dist from
Swift-BAT pos
Exposure Notes Vizier
3
[details]
03h 09m 17.67s +35° 19′ 26.5″ 4.8′′ Good 2.7′ 6.6 ks The source is fading with 3.1-σ significance. Vizier logo

1 Radius, 90% confidence.
2 Indicates how likely the source is to be real. See the 2SXPS 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.


Find an upper limit.

Sources found so far

So far 11 sources have been found in the XRT data. 2 sources match catalogued sources.

# RA (J2000) Dec (J2000) Err901 Detection
Flag2
Dist from
Swift-BAT pos
Exposure Notes Vizier
1
[details]
03h 08m 45.77s +35° 27′ 40.5″ 3.9′′ Good 11.5′ 6.6 ks This source may be affected by optical loading
Matches SIMBAD source: TYC 2347-941-1, 4.6″ away.
Vizier logo
2
[details]
03h 08m 34.56s +35° 16′ 33.9″ 5.0′′ Reasonable 7.2′ 6.6 ks Vizier logo
3
[details]
03h 09m 17.67s +35° 19′ 26.5″ 4.8′′ Good 2.7′ 6.6 ks The source is fading with 3.1-σ significance. Vizier logo
4
[details]
03h 08m 28.32s +35° 14′ 05.0″ 4.8′′ Good 9.0′ 6.6 ks Vizier logo
5
[details]
03h 08m 57.48s +35° 09′ 30.1″ 4.6′′ Good 8.1′ 6.6 ks Matches known X-ray source: 1RXS J030855.8+350852 (from ROSAT/RASSFSC), 42.932148266684″ away. Vizier logo
6
[details]
03h 09m 01.67s +35° 08′ 08.8″ 5.1′′ Poor 9.2′ 6.6 ks Vizier logo
7
[details]
03h 08m 45.25s +35° 12′ 00.6″ 4.4′′ Good 7.2′ 6.6 ks Vizier logo
8
[details]
03h 08m 35.04s +35° 21′ 29.3″ 5.3′′ Good 8.3′ 6.6 ks Vizier logo
9
[details]
03h 08m 40.19s +35° 14′ 44.3″ 5.4′′ Good 6.5′ 6.6 ks Vizier logo
10
[details]
03h 09m 02.03s +35° 28′ 25.1″ 5.6′′ Reasonable 11.3′ 4.7 ks Vizier logo
11
[details]
03h 08m 42.85s +35° 23′ 25.5″ 3.7′′ Good 8.3′ 6.6 ks Vizier logo

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.

FITS image.

Image of all observations processed so far

Exposure map

FITS exposure map.

Exposure map of all observations processed so far