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Swift Trigger: 1000926

Presumed name: GRB 201020A

Back to trigger list.

BAT 17h 24m 59.04s, +31° 25′ 30.0″
position:(261.246, +31.425 ± 180″)
XRT 17h 24m 54.70s, +31° 25′ 43.7″
position:(261.2279, 31.4288 ± 2.2″)
UVOT 17h 24m 54.65s, +31° 25′ 41.9″
position:(261.2277, +31.4283 ± 0.6″)
Galactic NHI:3.22×100 cm-2
Galactic E(B-V):0.043 mag
Best RA:17h 24m 54.65s= 261.2277 d
Best Dec:+31° 25′ 41.9″= +31.4283 d
Gal Lat:31.18
Gal Long:54.94
Sun angle:68.10°, -3.7 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

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
0.3′′261.2277531.42836GCN #28742GRB 201020A: Swift/UVOT ObservationsVizier logo
0.3′′261.2277931.42833GCN #28696GRB 201020A: Swift detection of a burst with an optical counterpart. Vizier logo
2.0′′261.2282531.42803GCN #28698GRB 201020A: Enhanced Swift-XRT positionVizier logo
34.7′′261.2390031.42800GCN #28705GRB 201020A: Swift-BAT refined analysis Vizier logo

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
98.5261.253631.4452SDSS J172500.86+312642.6G=18.2130, g=18.518, i=18.128, r=18.164, u=19.325, z=17.988Query vizier around this object
176.1261.262731.4677TYC 2605-280-1B=12.00, G=11.3891, H=10.363, J=10.558, K=10.341, V=11.53Query 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
11.4261.230931.4269R=22.1, g=22.7, i=21.8, u=23.0, z=21.5SDSSQuery vizier around this object
18.6261.226231.4333NEDQuery vizier around this object
24.3261.235231.4262B1=20.6, B2=20.4, I=18.4, R1=19.0, R2=19.0USNO-B1Query vizier around this object
24.6261.235031.4261NEDQuery vizier around this object
26.4261.232731.4349R=21.3, g=22.2, i=20.6, u=23.7, z=20.1SDSSQuery vizier around this object
28.4261.232531.4350NEDQuery vizier around this object
33.9261.237931.4247NEDQuery vizier around this object
35.0261.239231.4298B1=20.3, B2=21.0USNO-B1Query vizier around this object
35.7261.239131.4262R=24.3, g=22.8, i=25.2, u=24.8, z=21.5SDSSQuery vizier around this object
35.8261.220031.4358NEDQuery vizier around this object


There are 503 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
15.1261.226931.4329I=20.1, R=20.6, g=21.8, u=24.2, z=19.8SDSSQuery vizier around this object
15.2261.227031.4330B2=21.2, I=19.1, R2=20.1USNO-B1Query vizier around this object
24.4261.235231.4261I=18.8, R=19.2, g=20.2, u=22.8, z=18.5SDSSQuery vizier around this object
28.9261.233431.4223I=22.1, R=23.0, g=23.0, u=23.5, z=21.8SDSSQuery vizier around this object
32.1261.236831.4334I=20.9, R=21.9, g=23.2, u=24.9, z=20.2SDSSQuery vizier around this object
34.9261.220031.4358h=16.1, j=17.0, k=16.02MASSQuery vizier around this object
35.1261.220131.4359I=19.5, R=21.4, g=22.9, u=22.8, z=18.4SDSSQuery vizier around this object
35.3261.238331.4247I=19.9, R=20.4, g=21.8, u=23.7, z=19.5SDSSQuery vizier around this object
36.5261.239731.4299B2=21.1, R1=19.7, R2=19.9USNO-B1Query vizier around this object
36.7261.239831.4297I=19.7, R=20.2, g=21.4, u=25.6, z=19.5SDSSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 390 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.