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Swift Trigger: 1001130

Presumed name: GRB 201021C

Back to trigger list.

BAT 00h 50m 12.00s, -55° 50′ 20.4″
position:(12.550, -55.839 ± 180″)
XRT 00h 50m 07.06s, -55° 51′ 58.0″
position:(12.5294, -55.8661 ± 2.0″)
UVOT 00h 50m 06.84s, -55° 51′ 56.5″
position:(12.5285, -55.8657 ± 1.1″)
Galactic NHI:1.94×100 cm-2
Galactic E(B-V):0.017 mag
Best RA:00h 50m 06.84s= 12.5285 d
Best Dec:-55° 51′ 56.5″= -55.8657 d
Gal Lat:-61.26
Gal Long:303.32
Sun angle:112.16°, -11.1 hr East of Sun

1Sper #5 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 5 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
0.2′′12.52854-55.86575GCN #28730GRB 201021C: Swift detection of a burst with an optical counterpartVizier logo
0.8′′12.52887-55.86578GCN #28745GRB 201021C: Swift/UVOT DetectionVizier logo
1.0′′12.52887-55.86550GCN #28736GRB 201021C: Enhanced Swift-XRT positionVizier logo
53.2′′12.50300-55.86200GCN #28755GRB 201021C: Swift-BAT refined analysisVizier logo
105.5′′12.55000-55.83900GCN #28731Swift GRB201021.85: Global MASTER-Net observations report 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
126.712.5000-55.8350LEDA 405588Query vizier around this object

* RA/Dec in equinox J2000

X-ray sources

RA*Dec* Source table2Observatory Query
165.012.4832-55.90390 +/- 0XMM-NEWTONQuery vizier around this object
165.012.4832-55.90390 +/- 0XMM-NEWTONQuery vizier around this object

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

1Energy band for count-rate is mission specific.


RA*Dec*Redshift CatalogueQuery
17.512.5250-55.8614Mag=19.0NEDQuery vizier around this object
21.312.5312-55.8714Mag=19.0NEDQuery vizier around this object
22.112.5179-55.8669Mag=19.0NEDQuery vizier around this object
24.012.5409-55.8644B2=20.2, I=19.0, R1=19.7, R2=20.7USNO-B1Query vizier around this object
24.512.5411-55.8642B=20.8, R2=19.7SSSQuery vizier around this object
26.612.5413-55.8636Mag=19.0NEDQuery vizier around this object
32.212.5137-55.8692Mag=19.0NEDQuery vizier around this object
34.112.5136-55.8695B=22.3SSSQuery vizier around this object
35.312.5121-55.8622Mag=19.0NEDQuery vizier around this object
37.412.5120-55.8625B=22.1SSSQuery vizier around this object


There are 245 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
18.612.5248-55.8617I=18.5, R2=19.7USNO-B1Query vizier around this object
19.212.5251-55.8613h=16.1, j=16.4, k=15.22MASSQuery vizier around this object
19.512.5249-55.8613B2=21.0, I=18.3, R1=19.5, R2=19.4USNO-B1Query vizier around this object
22.212.5400-55.8644R1=20.2, R2=19.8USNO-B1Query vizier around this object
25.412.5414-55.8640B2=20.2, I=19.0, R1=20.1, R2=19.9USNO-B1Query vizier around this object
28.612.5153-55.8664B2=20.6, I=18.5, R1=20.0, R2=20.1USNO-B1Query vizier around this object
34.012.5135-55.8692B2=20.6, R2=23.6USNO-B1Query vizier around this object
40.612.5393-55.8759B2=19.4, R2=20.2USNO-B1Query vizier around this object
50.212.5320-55.8522h=15.1, j=16.0, k=15.12MASSQuery vizier around this object
50.512.5319-55.8522B2=19.4, I=17.4, R1=17.8, R2=17.9USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 91 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.