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Swift Trigger: 1062336

Presumed name: GRB 210731A

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BAT 20h 01m 15.36s, -28° 02′ 31.2″
position:(300.314, -28.042 ± 180″)
XRT 20h 01m 12.86s, -28° 03′ 34.2″
position:(300.3036, -28.0595 ± 5.8″)
UVOT No position available.
Galactic NHI:8.39×1020 cm-2
Galactic E(B-V):0.102 mag
Best RA:20h 01m 12.86s= 300.3036 d
Best Dec:-28° 03′ 34.2″= -28.0595 d
Gal Lat:-26.74
Gal Long:13.44
Sun angle:165.99°, -11.3 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

UVOT white image

white image

Blink images with DSS (link via GSFC)


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′′300.30360-28.05950GCN #30568GRB 210731A: Swift detection of a burstVizier logo
5.5′′300.30446-28.06083GCN #30578GRB 210731A: MASTER optical afterglow detection Vizier logo
6.2′′300.30467-28.06094GCN #30576GRB 210731A: Swift-XRT refined AnalysisVizier logo
7.1′′300.30500-28.06105GCN #30569GRB210731A: Enhanced Swift-XRT positionVizier logo
7.3′′300.30496-28.06114GCN #30570GRB 210731A: MeerLICHT optical afterglow detectionVizier logo
25.9′′300.31042-28.05556GCN #30580GRB 210731A: Swift-BAT refined analysisVizier logo
71.1′′300.31400-28.04200GCN #30567Swift GRB210731.93: Global MASTER-Net observations report Vizier logo

There are 13 matches in total. See the full table for details.

Catalogue Searches. Searched 200′ 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
154.4300.3513-28.05132MASS J20012430-2803045B=13.457, G=12.7877, H=11.5, I=12.249, J=11.803, K=11.472, R=12.74, V=12.910, i=12.555Query vizier around this object
174.8300.3575-28.0499Gaia DR2 6750844267462850816G=19.7576Query 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
6.1300.3054-28.0586NEDQuery vizier around this object
10.9300.3020-28.0568B=20.8, R2=19.6SSSQuery vizier around this object
16.0300.3038-28.0639NEDQuery vizier around this object
20.4300.3007-28.0646B=21.6, R2=20.6SSSQuery vizier around this object
25.7300.2955-28.0597B=21.1, R2=20.5SSSQuery vizier around this object
27.4300.2954-28.0617NEDQuery vizier around this object
31.0300.3033-28.0681NEDQuery vizier around this object
32.5300.2954-28.0542NEDQuery vizier around this object
32.5300.2996-28.0511NEDQuery vizier around this object
32.7300.2954-28.0540B=21.6, R2=19.4, i=18.7SSSQuery vizier around this object


There are 258 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
11.2300.3020-28.0567B2=20.7, R2=19.5USNO-B1Query vizier around this object
14.7300.3041-28.0555B2=21.5, R2=19.7USNO-B1Query vizier around this object
15.8300.3039-28.0639B1=16.8, B2=16.5, I=14.8, R1=15.0, R2=15.4USNO-B1Query vizier around this object
16.0300.3039-28.0639h=13.6, j=14.0, k=13.52MASSQuery vizier around this object
26.8300.2956-28.0618B1=19.5, B2=18.9, I=17.9, R1=18.3, R2=18.5USNO-B1Query vizier around this object
32.2300.2956-28.0540B2=21.5, I=18.7, R1=19.3, R2=19.6USNO-B1Query vizier around this object
32.7300.2996-28.0511h=13.7, j=14.1, k=13.72MASSQuery vizier around this object
33.0300.2996-28.0511B1=16.1, B2=15.7, I=14.6, R1=15.0, R2=15.1USNO-B1Query vizier around this object
37.2300.3054-28.0697B1=17.5, B2=17.1, I=16.5, R1=16.6, R2=16.6USNO-B1Query vizier around this object
38.2300.3055-28.0700h=15.9, j=16.4, k=15.82MASSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 277 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.