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Swift Trigger: 1015873

Presumed name: GRB 210104A

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BAT 06h 54m 49.20s, +64° 39′ 39.6″
position:(103.705, +64.661 ± 180″)
XRT 06h 55m 04.97s, +64° 40′ 27.5″
position:(103.7707, 64.6743 ± 5.3″)
UVOT No position available.
Galactic NHI:4.37×100 cm-2
Galactic E(B-V):0.047 mag
Best RA:06h 55m 04.97s= 103.7707 d
Best Dec:+64° 40′ 27.5″= 64.6743 d
Gal Lat:24.72
Gal Long:151.02
Sun angle:138.02°, -11.9 hr East of Sun

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
0.0′′103.7707064.67430GCN #29233GRB 210104A: Swift detection of a burst with a bright optical counterpartVizier logo
2.6′′103.7710064.67500GCN #29251GRB 210104A: Swift-BAT refined analysisVizier logo
6.4′′103.7715864.67603GCN #29440GRB 210104A: LBT observations Vizier logo
7.1′′103.7728164.67604GCN #29245GRB 210104A: Enhanced Swift-XRT positionVizier logo
7.2′′103.7723764.67617GCN #29262GRB 210104A: early ATLAS detections of the bright afterglow Vizier logo

There are 11 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
181.5103.829664.7180TYC 4118-413-1B=12.00, G=11.5670, H=10.217, J=10.507, K=10.2, V=11.41Query 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
16.0103.779264.6718B2=20.9, I=18.4, R1=19.6USNO-B1Query vizier around this object
16.3103.775864.6703NEDQuery vizier around this object
16.3103.779364.6717B=21.9, R=18.9APM-NQuery vizier around this object
16.4103.779264.6717NEDQuery vizier around this object
16.8103.762564.6711NEDQuery vizier around this object
17.7103.759264.6742NEDQuery vizier around this object
23.2103.784664.6767NEDQuery vizier around this object
23.5103.755864.6756NEDQuery vizier around this object
29.5103.781264.6811NEDQuery vizier around this object
34.6103.766364.6650NEDQuery vizier around this object


There are 239 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
13.5103.778264.6724B1=21.1, B2=20.8USNO-B1Query vizier around this object
17.1103.779764.6715B1=20.7, B2=19.6, R1=20.0, R2=19.3USNO-B1Query vizier around this object
17.7103.759264.6744B1=20.6, B2=20.9, R1=20.7, R2=19.9USNO-B1Query vizier around this object
21.4103.782164.6709B2=20.5, R1=20.0USNO-B1Query vizier around this object
23.2103.784764.6767h=14.3, j=14.6, k=14.32MASSQuery vizier around this object
23.3103.784664.6768B1=16.3, B2=16.3, I=15.0, R1=15.0, R2=15.4USNO-B1Query vizier around this object
29.4103.780964.6812h=11.1, j=11.3, k=11.02MASSQuery vizier around this object
29.6103.781064.6812B1=12.9, B2=12.6, I=11.4, R1=11.8, R2=12.2USNO-B1Query vizier around this object
29.7103.775364.6823B2=20.9, R1=19.5USNO-B1Query vizier around this object
34.4103.766264.6650B1=18.8, B2=18.7, I=16.3, R1=17.0, R2=16.9USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 147 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.