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Swift Trigger: 1031297

Presumed name: GRB 210207B

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BAT 18h 02m 19.68s, +53° 41′ 38.4″
position:(270.582, +53.694 ± 180″)
XRT 18h 02m 32.54s, +53° 41′ 01.0″
position:(270.6356, 53.6836 ± 4.7″)
UVOT 18h 02m 32.40s, +53° 40′ 55.9″
position:(270.6350, +53.6822 ± 0.7″)
Galactic NHI:3.11×100 cm-2
Galactic E(B-V):0.037 mag
Best RA:18h 02m 32.40s= 270.6350 d
Best Dec:+53° 40′ 55.9″= +53.6822 d
Gal Lat:28.62
Gal Long:81.68
Sun angle:81.35°, 3.4 hr West

1Sper #0 auto processing.

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

No UVOT images are currently available.


SPER results page for this trigger.

No SPER data received yet. Refresh this page to check again.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)RA DecDate reportedSource MiscQuery
0.1′′270.6350053.68222GCN #29759GRB 210207B: Prompt and very late time observations with HCT.Vizier logo
0.1′′270.6350053.68222GCN #29420GRB 210207B: Swift detection of a burst with a bright optical counterpartVizier logo
0.1′′270.6350053.68217GCN #29436GRB 210207B: Swift/UVOT DetectionVizier logo
0.7′′270.6347453.68210GCN #29422GRB 210207B: Enhanced Swift-XRT positionVizier logo
78.2′′270.6140053.70000GCN #29435GRB 210207B: Swift-BAT refined analysisVizier logo

There are 11 matches in total. See the full table for details.

Catalogue Searches. Searched 3.33′ around UVOT position

Click on the distance to view the full details (not available for sources from the SSS catalogue). Click on the column headers to sort the table on that column (click again to invert sort order).


RA*Dec*SIMBAD name Query
196.2270.569553.7205Gaia DR2 2125669341601848320G=16.0810Query vizier around this object

* RA/Dec in equinox J2000

X-ray sources

RA*Dec* Source table2Observatory Query

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

1Energy band for count-rate is mission specific.


RA*Dec*Redshift CatalogueQuery
9.5270.632053.6803B1=20.7, B2=21.3, I=18.5, R2=19.4USNO-B1Query vizier around this object
9.7270.631753.6803NEDQuery vizier around this object
9.8270.631753.6803B=20.9, R=19.2APM-NQuery vizier around this object
16.6270.642553.6825NEDQuery vizier around this object
19.1270.635453.6875NEDQuery vizier around this object
25.0270.625453.6781NEDQuery vizier around this object
28.7270.648353.6828NEDQuery vizier around this object
33.4270.619653.6806NEDQuery vizier around this object
33.5270.645453.6753NEDQuery vizier around this object
33.8270.632153.6731NEDQuery vizier around this object


There are 307 galaxies within the position error. The full list is here.

* RA/Dec in equinox J2000

Magnitudes depend on the catalogue. e.g. For Sloan, R is the Sloan r mag, not the Johnson R from APM, for example


RA*Dec* CatalogueQuery
24.5270.625953.6781B1=20.5, B2=21.6, I=18.9, R1=19.5, R2=19.7USNO-B1Query vizier around this object
33.0270.645053.6752B1=16.1, B2=16.5, I=14.3, R1=15.2, R2=15.3USNO-B1Query vizier around this object
33.2270.645053.6751h=14.1, j=14.3, k=14.12MASSQuery vizier around this object
33.2270.631753.6732B2=21.9, R2=19.6USNO-B1Query vizier around this object
38.3270.650853.6771B1=20.7, B2=20.8, I=16.4, R1=18.2, R2=18.1USNO-B1Query vizier around this object
38.5270.650853.6770h=15.2, j=15.9, k=15.32MASSQuery vizier around this object
41.8270.641853.6931B2=22.0, R2=19.5USNO-B1Query vizier around this object
50.4270.639453.6684I=18.4, R1=19.4, R2=19.7USNO-B1Query vizier around this object
50.8270.639153.6683B1=20.8, R1=19.8USNO-B1Query vizier around this object
54.5270.625553.6682B2=22.1, I=19.0, R1=19.8, R2=19.8USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 127 stars within the position error. The full list is here.

* RA/Dec in equinox J2000

Magnitudes depend on the catalogue. e.g. For Sloan, R is the Sloan r mag, not the Johnson R from APM, for example.