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Swift Trigger: 867987

Presumed name: GRB 181020A

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BAT 00h 55m 52.08s, -47° 22′ 48.0″
position:(13.967, -47.380 ± 180″)
XRT 00h 55m 56.09s, -47° 22′ 46.6″
position:(13.9837, -47.3796 ± 4.8″)
UVOT 00h 55m 55.78s, -47° 22′ 51.6″
position:(13.9824, -47.3810 ± 0.8″)
Galactic NHI:1.58×100 cm-2
Galactic E(B-V):0.014 mag
Best RA:00h 55m 55.78s= 13.9824 d
Best Dec:-47° 22′ 51.6″= -47.3810 d
Gal Lat:-69.73
Gal Long:300.74
Sun angle:121.34°, -11.3 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
0.2′′13.98242-47.38106GCN #23349GRB 181020A: Swift detection of a burst with an optical counterpartVizier logo
0.3′′13.98237-47.38108GCN #23360GRB 181020A: Swift/UVOT DetectionVizier logo
2.4′′13.98250-47.38033GCN #23351GRB 181020A: Enhanced Swift-XRT positionVizier logo
34.3′′13.98700-47.37200GCN #23357GRB 181020A: Swift-BAT refined analysisVizier logo
48.8′′13.96471-47.38736GCN #23356GRB 181020A: VLT/X-shooter spectroscopy and redshiftVizier logo

There are 11 matches in total. See the full table for details.

Catalogue Searches. Searched 3.33′ around UVOT 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
183.214.0275-47.4217LEDA 501631Query 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
9.813.9852-47.3829B=18.7, R2=17.1, i=16.6SSSQuery vizier around this object
9.913.9854-47.3829h=14.5, j=15.3, k=13.72MASSQuery vizier around this object
10.013.9854-47.3831Mag=18.86NEDQuery vizier around this object
11.713.9860-47.3831B2=17.9, I=18.9USNO-B1Query vizier around this object
11.913.9871-47.3801B=20.8, R2=19.5, i=18.1SSSQuery vizier around this object
12.213.9871-47.3800Mag=19.1NEDQuery vizier around this object
15.213.9787-47.3776B=22.6SSSQuery vizier around this object
35.813.9679-47.3789Mag=20.25NEDQuery vizier around this object
35.813.9680-47.3790B=20.2, R2=18.8, i=18.4SSSQuery vizier around this object
48.713.9646-47.3875Mag=20.25NEDQuery vizier around this object


There are 112 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
9.813.9852-47.3829B2=18.0, I=17.8, R1=16.3, R2=16.3USNO-B1Query vizier around this object
9.913.9852-47.3830h=15.0, j=15.7, k=14.52MASSQuery vizier around this object
11.913.9871-47.3801B2=20.1, I=19.1, R1=19.5, R2=19.6USNO-B1Query vizier around this object
23.113.9848-47.3748B2=20.2, I=18.8, R1=19.8, R2=19.6USNO-B1Query vizier around this object
35.913.9680-47.3790B2=20.0, I=18.6, R1=19.4, R2=19.2USNO-B1Query vizier around this object
48.713.9648-47.3874h=15.9, j=16.6, k=15.62MASSQuery vizier around this object
48.813.9647-47.3874B2=19.6, I=19.0, R1=18.3, R2=18.8USNO-B1Query vizier around this object
55.013.9599-47.3798B2=20.1, R1=19.4, R2=19.8USNO-B1Query vizier around this object
57.314.0053-47.3774B2=19.1, R2=20.0USNO-B1Query vizier around this object
59.113.9714-47.3956B2=19.4, I=18.9, R2=19.9USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 100 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.