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Swift Trigger: 1015919

Presumed name: GRB 210104B

Back to trigger list.

BAT 03h 34m 24.24s, +37° 55′ 51.6″
position:(53.601, +37.931 ± 180″)
XRT 03h 34m 12.89s, +37° 55′ 48.7″
position:(53.5537, 37.9302 ± 2.3″)
UVOT No position available.
Galactic NHI:1.36×100 cm-2
Galactic E(B-V):0.563 mag
Best RA:03h 34m 12.89s= 53.5537 d
Best Dec:+37° 55′ 48.7″= 37.9302 d
Gal Lat:-14.59
Gal Long:155.03
Sun angle:133.16°, -8.5 hr East of Sun

1Sper #4 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 6 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
0.5′′53.5538737.93019GCN #29243GRB 210104B: Swift detection of a burstVizier logo
2.4′′53.5529637.93050GCN #29253GRB 210104B: Enhanced Swift-XRT positionVizier logo
77.7′′53.5610037.95100GCN #29266GRB 210104B: Swift-BAT refined analysisVizier logo
134.3′′53.6010037.93100GCN #29242Swift GRB210104.88: Global MASTER-Net observations report Vizier 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
187.353.500037.9000LBN 155.13-14.65Query 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
6.653.555837.9311NEDQuery vizier around this object
17.953.547937.9283NEDQuery vizier around this object
18.553.558837.9270B2=20.8, R1=19.9, R2=19.9USNO-B1Query vizier around this object
24.453.550837.9367NEDQuery vizier around this object
24.853.560837.9342NEDQuery vizier around this object
27.553.556737.9228NEDQuery vizier around this object
30.153.550037.9381NEDQuery vizier around this object
38.153.542137.9250NEDQuery vizier around this object
38.553.541737.9252B2=20.7, I=18.1, R2=19.1USNO-B1Query vizier around this object
39.653.540837.9258NEDQuery vizier around this object


There are 228 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
22.753.560437.9336B1=20.2, I=18.3, R2=18.6USNO-B1Query vizier around this object
38.153.542037.9250h=15.5, j=16.5, k=15.52MASSQuery vizier around this object
40.053.540637.9260B1=20.1, B2=19.5, I=16.6, R1=17.4, R2=17.5USNO-B1Query vizier around this object
40.253.540637.9260h=14.9, j=15.4, k=14.62MASSQuery vizier around this object
41.453.552737.9187h=15.5, j=16.3, k=15.32MASSQuery vizier around this object
45.053.556037.9426h=13.8, j=14.3, k=13.62MASSQuery vizier around this object
45.453.556037.9427B1=18.3, B2=17.9, I=15.2, R1=15.6, R2=16.0USNO-B1Query vizier around this object
46.153.567437.9371R1=19.8, R2=19.9USNO-B1Query vizier around this object
53.853.572637.9293B1=20.2, B2=19.5, I=16.4, R1=17.3, R2=17.1USNO-B1Query vizier around this object
53.953.572637.9293h=14.4, j=15.1, k=14.12MASSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 168 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.