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Swift Trigger: 780845

Presumed name: GRB 171020A

Back to trigger list.

BAT 02h 37m 02.88s, +15° 11′ 09.6″
position:(39.262, 15.186 ± 180″)
XRT 02h 36m 59.57s, +15° 12′ 13.7″
position:(39.2482, 15.2038 ± 2.2″)
UVOT No position available.
Galactic NHI:9.70×100 cm-2
Galactic E(B-V):0.179 mag
Best RA:02h 36m 59.57s= 39.2482 d
Best Dec:+15° 12′ 13.7″= 15.2038 d
Gal Lat:-40.52
Gal Long:157.28
Sun angle:165.85°, 11.1 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

UVOT u image

u image

UVOT white image

white image

UVOT white image

white image

Blink images with DSS (link via GSFC)


SPER results page for this trigger.

Image of the SPER data

There are 12 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′′39.2482015.20380GCN #22028GRB 171020A: Swift detection of a burstVizier logo
1.3′′39.2483715.20413GCN #22034GRB 171020A: Enhanced Swift-XRT positionVizier logo
2.4′′39.2484215.20444GCN #22029GRB 171020A: NOT optical afterglow detectionVizier logo
37.9′′39.2395415.21022GCN #22031GRB 171020A: Confirmation of OT fadingVizier logo
42.9′′39.2595815.19917GCN #22038GRB 171020A: 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

* 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
24.539.247515.1970B1=21.1, B2=20.6, I=17.0, R1=18.7, R2=18.5USNO-B1Query vizier around this object
25.439.247415.1968B=21.3, R=18.3APM-NQuery vizier around this object
38.039.239515.2102B1=17.9, B2=17.4, I=16.3, R1=16.9, R2=16.6USNO-B1Query vizier around this object
58.439.233315.1964B=21.8, R=19.2APM-NQuery vizier around this object
91.239.261515.1819B=21.8, R=19.6APM-NQuery vizier around this object
100.739.219315.2010B=21.8, R=19.8APM-NQuery vizier around this object
112.539.243815.1728B=21.8, R=20.0APM-NQuery vizier around this object
115.739.223615.1821I=18.6, R2=19.5USNO-B1Query vizier around this object
119.339.221615.2248B=21.6, R=19.5APM-NQuery vizier around this object
149.439.205415.1998B=21.8, R=20.0APM-NQuery vizier around this object


There are 13 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
24.839.247515.1970h=14.5, j=15.2, k=14.42MASSQuery vizier around this object
33.139.245615.2126h=16.2, j=16.5, k=15.32MASSQuery vizier around this object
37.939.239515.2102h=15.3, j=15.6, k=15.02MASSQuery vizier around this object
58.439.233115.1966B2=20.8, R1=19.3, R2=19.5USNO-B1Query vizier around this object
65.139.251615.1860B1=20.5, B2=19.5, I=18.3, R1=19.0, R2=18.6USNO-B1Query vizier around this object
70.439.267815.2086B2=21.0, I=18.5, R1=19.2, R2=18.9USNO-B1Query vizier around this object
90.939.261415.1820R1=19.8, R2=19.8USNO-B1Query vizier around this object
92.939.230615.2232h=14.4, j=15.0, k=14.22MASSQuery vizier around this object
93.339.230515.2233B1=20.9, B2=20.4, I=16.8, R1=18.4, R2=18.3USNO-B1Query vizier around this object
103.839.269715.1838B1=21.1, I=18.3, R2=19.7USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 42 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.