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Swift Trigger: 1036227

Presumed name: GRB 210308A

Back to trigger list.

BAT 04h 28m 21.12s, +37° 24′ 39.6″
position:(67.088, 37.411 ± 180″)
XRT 04h 28m 17.90s, +37° 26′ 02.8″
position:(67.0746, 37.4341 ± 2.2″)
UVOT No position available.
Galactic NHI:3.03×100 cm-2
Galactic E(B-V):1.269 mag
Best RA:04h 28m 17.90s= 67.0746 d
Best Dec:+37° 26′ 02.8″= 37.4341 d
Gal Lat:-7.82
Gal Long:163.49
Sun angle:83.90°, -5.2 hr East of Sun

1Sper #3 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.

Image of the SPER data

There are 3 SPER messages, and 1 objects have been found

See the SPER page for details of how this position was produced.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)RA DecDate reportedSource MiscQuery
2.2′′67.0738837.43392GCN #29630GRB 210308A: Swift/UVOT DetectionVizier logo
2.2′′67.0738837.43389GCN #29619GRB 210308A: Swift detection of a burst with an optical counterpartVizier logo
30.2′′67.0830037.42900GCN #29633GRB 210308A: Swift-BAT refined analysisVizier logo

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
98.567.088137.40892MASS J04282114+3724321G=13.6875, H=9.698, J=10.589, K=9.412Query 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
4.867.075837.4331NEDQuery vizier around this object
9.167.077537.4353NEDQuery vizier around this object
11.267.073137.4312I=18.6, R1=19.8, R2=19.8USNO-B1Query vizier around this object
11.767.073337.4311NEDQuery vizier around this object
17.567.068837.4322NEDQuery vizier around this object
17.567.079437.4311B2=20.0, I=17.1, R1=18.2, R2=18.1USNO-B1Query vizier around this object
17.867.079637.4311NEDQuery vizier around this object
18.667.068237.4331I=18.6, R1=19.3, R2=20.0USNO-B1Query vizier around this object
19.167.067937.4356NEDQuery vizier around this object
19.467.068037.4354I=18.5, R2=20.1USNO-B1Query vizier around this object


There are 269 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
11.767.073237.4310h=16.1, j=17.1, k=15.82MASSQuery vizier around this object
17.867.079537.4310h=15.0, j=15.8, k=14.72MASSQuery vizier around this object
19.667.068037.4357I=18.7, R1=19.6, R2=19.7USNO-B1Query vizier around this object
25.167.079337.4282h=15.7, j=16.3, k=15.72MASSQuery vizier around this object
37.867.061737.4363h=16.0, j=17.1, k=15.92MASSQuery vizier around this object
38.767.067737.4248h=15.0, j=15.5, k=14.92MASSQuery vizier around this object
38.867.067637.4249B1=20.2, B2=19.6, I=16.9, R1=18.2, R2=17.9USNO-B1Query vizier around this object
39.667.087037.4390R1=19.5, R2=20.0USNO-B1Query vizier around this object
41.967.061837.4284B2=21.3, I=18.8, R2=20.1USNO-B1Query vizier around this object
50.267.091937.4367B1=16.4, B2=15.9, I=12.8, R1=13.8, R2=13.9USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 231 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.