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Swift Trigger: 1035994

Presumed name: GRB 210306A

Back to trigger list.

BAT 08h 39m 51.60s, +60° 11′ 45.6″
position:(129.965, 60.196 ± 180″)
XRT 08h 39m 51.43s, +60° 12′ 11.5″
position:(129.9643, 60.2032 ± 5.5″)
UVOT 08h 39m 49.94s, +60° 12′ 19.1″
position:(129.9581, +60.2053 ± 0.6″)
Galactic NHI:3.49×100 cm-2
Galactic E(B-V):0.059 mag
Best RA:08h 39m 49.94s= 129.9581 d
Best Dec:+60° 12′ 19.1″= +60.2053 d
Gal Lat:36.67
Gal Long:156.4
Sun angle:118.88°, -9.6 hr East of Sun

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
0.3′′129.9582560.20533GCN #29636GRB 210306A: Swift/UVOT DetectionVizier logo
0.3′′129.9581260.20539GCN #29597GRB 210306A: Swift detection of a burst with a bright optical counterpartVizier logo
0.3′′129.9582960.20530GCN #29657GRB 210306A: GIT optical follow-upVizier logo
0.7′′129.9577560.20522GCN #29622GRB 210306A: Swift-XRT refined AnalysisVizier logo
0.7′′129.9585060.20525GCN #29680GRB 210321A: DDOTI Afterglow ConfirmationVizier logo
0.7′′129.9585060.20525GCN #29598GRB 210306A: DDOTI Afterglow ConfirmationVizier logo
1.3′′129.9587960.20522GCN #29603GRB 210306A: iTelescope T24 optical observationsVizier logo
12.6′′129.9637560.20319GCN #29617GRB 210306A: Swift-BAT refined analysisVizier logo
160.9′′129.9242860.16389GCN #29604GRB 210306A: Tautenburg observationsVizier logo

There are 15 matches in total. See the full table for details.

Catalogue Searches. Searched 3.33′ around XRT 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
95.4129.929660.2233NVSS J083943+601324Query vizier around this object
128.5129.925460.1732SDSS J083942.10+601023.4G=21.0158, g=21.160, i=20.8835, r=21.005, u=21.794, z=20.7684Query vizier around this object
183.4129.875760.1776NVSS J083930+601039Query vizier around this object

There are 3 SIMBAD objects within the position error. The full list is here.

* 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
10.7129.963360.2069NEDQuery vizier around this object
11.0129.952960.2036Mag=18.9NEDQuery vizier around this object
13.4129.963260.2069R=22.2, g=22.3, i=20.9, u=22.9, z=21.0SDSSQuery vizier around this object
17.8129.966360.2081Mag=23.2NEDQuery vizier around this object
21.1129.971660.1986R=23.2, g=23.4, i=22.1, u=24.1, z=21.2SDSSQuery vizier around this object
23.3129.962960.2114Mag=21.0NEDQuery vizier around this object
25.3129.959560.2098R=22.6, g=22.9, i=23.9, u=23.3, z=22.0SDSSQuery vizier around this object
29.3129.963060.2113R=22.0, g=23.1, i=21.5, u=23.6, z=20.9SDSSQuery vizier around this object
30.1129.970060.1994Mag=21.0NEDQuery vizier around this object
32.6129.976160.2101R=22.8, g=23.9, i=21.0, u=25.0, z=21.0SDSSQuery vizier around this object


There are 489 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
18.2129.966260.2082I=20.4, R=21.2, g=23.0, u=24.1, z=20.1SDSSQuery vizier around this object
20.6129.952960.2037I=18.3, R=18.5, g=18.9, u=20.1, z=18.3SDSSQuery vizier around this object
20.6129.952860.2038B1=18.8, B2=19.2, I=17.9, R1=18.7, R2=18.3USNO-B1Query vizier around this object
22.3129.951960.2027B1=18.5, I=18.7, R1=18.2USNO-B1Query vizier around this object
30.6129.963360.1947I=21.5, R=23.2, g=24.0, u=23.8, z=20.3SDSSQuery vizier around this object
36.0129.977360.2109B2=19.6, I=18.4, R1=19.2, R2=18.8USNO-B1Query vizier around this object
47.9129.961560.2164B1=21.2, B2=20.7USNO-B1Query vizier around this object
60.7129.936460.2128I=22.8, R=23.7, g=22.9, u=24.7, z=22.8SDSSQuery vizier around this object
61.2129.998360.2013I=22.2, R=24.1, g=23.8, u=24.1, z=20.9SDSSQuery vizier around this object
64.8129.995660.1941I=21.6, R=23.7, g=24.8, u=23.7, z=20.9SDSSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 166 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.