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Swift Trigger: 769567

Presumed name: GRB 170827A

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BAT 18h 24m 43.20s, -40° 13′ 12.0″
position:(276.180, -40.220 ± 180″)
XRT 18h 24m 36.19s, -40° 12′ 05.8″
position:(276.1508, -40.2016 ± 4.9″)
UVOT No position available.
Galactic NHI:8.75×100 cm-2
Galactic E(B-V):0.102 mag
Best RA:18h 24m 36.19s= 276.1508 d
Best Dec:-40° 12′ 05.8″= -40.2016 d
Gal Lat:-12.41
Gal Long:353.89
Sun angle:119.56°, -8.0 hr East of Sun

1Sper #0 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

Blink images with DSS (link via GSFC)


SPER results page for this trigger.

No SPER data received yet. Refresh this page to check again.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)RA DecDate reportedSource MiscQuery
0.0′′276.15080-40.20160GCN #21718GRB 170827A: Swift detection of a burstVizier logo
0.8′′276.15058-40.20175GCN #21728GRB 170827A: ePESSTO NTT afterglow candidateVizier logo
104.4′′276.18875-40.20219GCN #21724GRB 170827A� Swift-BAT refined analysisVizier 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
61.4276.1419-40.2172TYC 7905-1180-1B=12.99, H=9.067, J=9.668, K=8.98, V=12.04Query vizier around this object
145.5276.1970-40.1819TYC 7905-882-1B=11.99, H=6.087, J=6.938, K=5.834, V=10.61Query 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
17.5276.1568-40.2000B=19.7, R2=18.4SSSQuery vizier around this object
19.5276.1574-40.1996B2=17.6, R1=17.8, R2=17.5USNO-B1Query vizier around this object
20.0276.1575-40.1995B=19.6, R2=18.4, i=18.1SSSQuery vizier around this object
20.8276.1483-40.1962B2=14.6, I=12.9, R1=13.9, R2=13.7USNO-B1Query vizier around this object
22.8276.1490-40.1954B=18.9SSSQuery vizier around this object
25.6276.1544-40.1951B=19.9, R2=18.0, i=17.4SSSQuery vizier around this object
25.8276.1546-40.1950R1=17.6, R2=18.7USNO-B1Query vizier around this object
28.9276.1504-40.1936B=21.0, R2=19.3, i=17.7SSSQuery vizier around this object
29.7276.1525-40.1935B=19.9, R2=19.6SSSQuery vizier around this object
31.8276.1449-40.2092I=15.8, R1=16.8, R2=17.8USNO-B1Query vizier around this object


There are 184 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
5.2276.1500-40.2029B2=17.9, R1=17.3, R2=17.6USNO-B1Query vizier around this object
6.7276.1531-40.2022h=15.7, j=16.6, k=16.52MASSQuery vizier around this object
6.8276.1532-40.2021B2=18.2, I=17.2, R1=17.5, R2=18.9USNO-B1Query vizier around this object
8.4276.1496-40.2038B2=18.7, R2=20.4USNO-B1Query vizier around this object
12.3276.1515-40.1982B2=16.9, I=16.0, R1=16.1, R2=16.9USNO-B1Query vizier around this object
12.5276.1514-40.1982h=15.6, j=15.9, k=15.32MASSQuery vizier around this object
15.6276.1475-40.2051B2=17.9, R1=17.2, R2=18.7USNO-B1Query vizier around this object
15.9276.1451-40.2011B2=18.0, R1=17.8, R2=19.2USNO-B1Query vizier around this object
16.0276.1474-40.2052h=15.7, j=16.3, k=15.32MASSQuery vizier around this object
16.5276.1568-40.2020B2=16.2, I=14.4, R1=15.0, R2=15.2USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 948 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.