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Swift Trigger: 1013852

Presumed name: GRB 201221A

Back to trigger list.

BAT 14h 17m 54.48s, -45° 24′ 39.6″
position:(214.477, -45.411 ± 180″)
XRT 14h 17m 55.25s, -45° 25′ 00.1″
position:(214.4802, -45.4167 ± 2.4″)
UVOT No position available.
Galactic NHI:6.60×100 cm-2
Galactic E(B-V):0.113 mag
Best RA:14h 17m 55.25s= 214.4802 d
Best Dec:-45° 25′ 00.1″= -45.4167 d
Gal Lat:14.83
Gal Long:318.45
Sun angle:49.31°, 3.7 hr West

1Sper #4 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 7 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
0.7′′214.48046-45.41664GCN #29097GRB 201221A: Prompt enhanced Swift-XRT positionVizier logo
1.8′′214.48016-45.41620GCN #29105GRB 201221A: Enhanced Swift-XRT positionVizier logo
2.1′′214.48025-45.41611GCN #29100GRB 201221A: VLT/X-shooter afterglow discovery and spectroscopic redshift z = 5.7Vizier logo
4.1′′214.47885-45.41606GCN #29096GRB 201221A: Swift detection of a burstVizier logo
43.3′′214.48800-45.40600GCN #29116GRB 201221A: 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

* 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
13.2214.4815-45.4131B2=20.6, R1=16.1, R2=19.0USNO-B1Query vizier around this object
13.3214.4854-45.4174B=22.1, R2=20.2SSSQuery vizier around this object
16.4214.4795-45.4122I=18.4, R1=19.5USNO-B1Query vizier around this object
18.1214.4857-45.4199B=21.5SSSQuery vizier around this object
20.4214.4882-45.4160B=22.0SSSQuery vizier around this object
21.0214.4751-45.4121I=18.7, R1=20.0USNO-B1Query vizier around this object
21.1214.4883-45.4161NEDQuery vizier around this object
22.3214.4850-45.4219NEDQuery vizier around this object
27.7214.4787-45.4242NEDQuery vizier around this object
28.4214.4900-45.4131NEDQuery vizier around this object


There are 524 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
6.0214.4814-45.4181B2=20.9, I=18.8, R1=19.3, R2=20.0USNO-B1Query vizier around this object
16.0214.4798-45.4123B2=19.8, I=18.3, R1=19.0, R2=19.0USNO-B1Query vizier around this object
22.3214.4850-45.4219h=14.6, j=15.1, k=14.42MASSQuery vizier around this object
22.5214.4852-45.4218B2=17.3, I=16.0, R1=16.4, R2=16.1USNO-B1Query vizier around this object
27.5214.4788-45.4243B2=16.9, I=15.7, R1=15.9, R2=15.9USNO-B1Query vizier around this object
27.7214.4787-45.4243h=14.7, j=15.1, k=14.62MASSQuery vizier around this object
28.4214.4901-45.4129h=14.9, j=15.3, k=14.92MASSQuery vizier around this object
28.9214.4903-45.4129B2=17.1, I=15.9, R1=16.1, R2=15.9USNO-B1Query vizier around this object
32.4214.4768-45.4080B2=21.4, I=18.5, R1=19.8USNO-B1Query vizier around this object
36.9214.4656-45.4165B2=18.5, I=17.8, R1=17.7, R2=17.8USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 471 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.