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Swift Trigger: 660671

Presumed name: GRB 151021A

Back to trigger list.

BAT 22h 30m 26.64s, -33° 11′ 56.4″
position:(337.611, -33.199 ± 180″)
XRT 22h 30m 35.09s, -33° 11′ 56.7″
position:(337.64619, -33.19907 ± 3.6″)
UVOT No position available.
Galactic NHI:1.09×100 cm-2
Galactic E(B-V):0.012 mag
Best RA:22h 30m 35.09s= 337.64619 d
Best Dec:-33° 11′ 56.7″= -33.19907 d
Gal Lat:-59.11
Gal Long:12.94
Sun angle:117.14°, -8.8 hr East of Sun

1Sper #2 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

UVOT white image

white image

Blink images with DSS (link via GSFC)


SPER results page for this trigger.

Image of the SPER data

There are 2 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
0.0′′337.64619-33.19907GCN #18425GRB 151021A: Swift detection of a burstVizier logo
10.4′′337.64347-33.19731GCN #18428GRB 151021A: Enhanced Swift-XRT positionVizier logo
10.4′′337.64346-33.19731GCN #18432GRB 151021A: Swift/UVOT DetectionVizier logo
10.5′′337.64342-33.19731GCN #18427GRB 150921A: MASTER-NET bright OT detectionVizier logo
11.5′′337.64320-33.19707GCN #18426GRB 151021A: Optical counterpart and redshift from X-shooterVizier logo
35.0′′337.64708-33.18939GCN #18429GRB 151021A: Swift-BAT refined analysisVizier 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
160.4337.6946-33.1805TYC 7500-576-1B=13.50, H=10.809, J=11.135, K=10.697, R=11.07, V=11.93Query 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
20.6337.6450-33.2047Mag=18.4NEDQuery vizier around this object
21.5337.6529-33.2014Mag=18.4NEDQuery vizier around this object
21.9337.6531-33.2011B=21.7, R2=20.6SSSQuery vizier around this object
30.4337.6517-33.2061Mag=18.4NEDQuery vizier around this object
40.7337.6421-33.1883B=22.4, R2=21.2SSSQuery vizier around this object
41.1337.6579-33.1936Mag=18.4NEDQuery vizier around this object
53.2337.6488-33.2136Mag=19.9NEDQuery vizier around this object
57.0337.6651-33.2002B=20.6, R2=19.4, i=19.3SSSQuery vizier around this object
57.8337.6654-33.2003Mag=19.4NEDQuery vizier around this object
74.1337.6251-33.2097B=22.4SSSQuery vizier around this object


There are 95 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
9.3337.6443-33.1970B2=19.4, I=17.8USNO-B1Query vizier around this object
20.7337.6450-33.2047B2=20.4, I=18.7, R1=18.3, R2=18.9USNO-B1Query vizier around this object
22.2337.6532-33.2008B2=20.5, R1=19.6, R2=20.0USNO-B1Query vizier around this object
32.4337.6356-33.2004h=13.4, j=13.9, k=13.12MASSQuery vizier around this object
32.7337.6354-33.2002B2=18.8, I=14.8, R1=15.4, R2=15.5USNO-B1Query vizier around this object
38.1337.6410-33.2087B2=20.8, I=18.7, R1=19.6, R2=20.1USNO-B1Query vizier around this object
41.9337.6583-33.1934B2=19.5, I=18.4, R1=17.6, R2=18.0USNO-B1Query vizier around this object
54.0337.6484-33.2140B2=20.3, R1=19.6, R2=20.4USNO-B1Query vizier around this object
57.3337.6652-33.2002B2=20.8, R1=18.5, R2=19.4USNO-B1Query vizier around this object
66.5337.6283-33.1883B2=20.1, R2=20.5USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 74 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.