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Swift Trigger: 1014037

Presumed name: GRB 201221D

Back to trigger list.

BAT 11h 24m 11.76s, +42° 08′ 38.4″
position:(171.049, +42.144 ± 180″)
XRT 11h 24m 14.09s, +42° 08′ 37.7″
position:(171.0587, 42.1438 ± 4.2″)
UVOT No position available.
Galactic NHI:2.49×100 cm-2
Galactic E(B-V):0.020 mag
Best RA:11h 24m 14.09s= 171.0587 d
Best Dec:+42° 08′ 37.7″= 42.1438 d
Gal Lat:66.73
Gal Long:167.12
Sun angle:112.09°, 6.6 hr West

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

No UVOT images are currently available.


SPER results page for this trigger.

Image of the SPER data

There are 4 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′′171.0587042.14380GCN #29113GRB 201221D: Prompt enhanced Swift-XRT positionVizier logo
1.7′′171.0587542.14333GCN #29112GRB 201221D: Swift detection of a bright short burstVizier logo
2.2′′171.0583842.14436GCN #29133GRB 201221D: Archival PS1 Imaging of the Putative Host GalaxyVizier logo
2.4′′171.0584242.14444GCN #29117GRB 201221D: candidate optical counterpart from the NOTVizier logo
2.5′′171.0591242.14319GCN #29119GRB 201221D: Enhanced Swift-XRT positionVizier logo
31.1′′171.0550042.15200GCN #29139GRB 201221D: Swift-BAT refined analysisVizier logo

There are 12 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
78.6171.035642.1302SDSS J112408.54+420748.7g=18.753, i=17.998, r=18.357, u=19.552, z=17.929Query vizier around this object
80.7171.030142.1510SDSS J112407.21+420903.5g=19.699, i=18.150, r=18.566, u=21.321, z=17.883Query vizier around this object
91.0171.025842.1504SDSS J112406.19+420901.5g=18.530, i=17.637, r=17.962, u=20.010, z=17.606Query vizier around this object
184.4171.122542.1635SDSS J112429.39+420948.5g=19.704, i=18.515, r=18.890, u=20.868, z=18.318Query vizier around this object

There are 4 SIMBAD objects within the position error. The full list is here.

* 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
22.3171.061742.1497Mag=21.6NEDQuery vizier around this object
22.3171.061642.1496R=19.6, g=21.3, i=19.1, u=23.2, z=18.7SDSSQuery vizier around this object
22.5171.061642.1496B=22.1, R=19.2APM-NQuery vizier around this object
22.6171.053142.1391R=21.5, g=22.2, i=21.6, u=23.3, z=22.7SDSSQuery vizier around this object
22.6171.052942.1392Mag=22.4NEDQuery vizier around this object
24.9171.049942.1416R=22.0, g=23.8, i=21.1, u=25.1, z=22.0SDSSQuery vizier around this object
24.9171.049642.1417Mag=22.0NEDQuery vizier around this object
25.6171.062542.1372Mag=23.3NEDQuery vizier around this object
27.2171.052542.1500Mag=23.3NEDQuery vizier around this object
33.8171.047842.1486R=24.5, g=25.6, i=25.1, u=26.2, z=20.6SDSSQuery vizier around this object


There are 510 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
22.6171.061642.1497B2=21.0, I=18.7, R1=19.5, R2=19.1USNO-B1Query vizier around this object
25.6171.062642.1373I=20.6, R=21.9, g=23.3, u=24.3, z=20.0SDSSQuery vizier around this object
37.3171.065542.1347I=22.9, R=22.4, g=23.5, u=25.4, z=22.9SDSSQuery vizier around this object
37.8171.071342.1390I=23.8, R=25.8, g=24.4, u=24.9, z=20.8SDSSQuery vizier around this object
43.7171.073242.1381I=21.5, R=21.5, g=21.7, u=23.3, z=22.4SDSSQuery vizier around this object
43.9171.062942.1556R1=19.9, R2=19.9USNO-B1Query vizier around this object
44.1171.044842.1372I=21.6, R=22.7, g=25.1, u=25.4, z=20.6SDSSQuery vizier around this object
48.4171.055142.1306B1=21.8, B2=21.5, I=19.0, R1=19.7, R2=19.1USNO-B1Query vizier around this object
49.7171.042342.1503I=22.6, R=23.5, g=24.5, u=23.9, z=20.7SDSSQuery vizier around this object
55.6171.076442.1520I=25.7, R=25.6, g=24.6, u=24.4, z=21.0SDSSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 149 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.