Skip banner and navigation tools.

Home > GRB region information > 1069551

Swift Trigger: 1069551

Presumed name: GRB 210820A

Back to trigger list.

Related pages: Burst Analyser | Enhanced position | Light curve | Spectrum | Image | XRT Catalogue entry | Download obs data | GCN Notices

BAT	01h 22m 30.96s, +04° 37′ 55.2″
position:	(20.629, +4.632 ± 180″)
XRT	01h 22m 33.48s, +04° 36′ 28.8″
position:	(20.6395, 4.6080 ± 1.9″)
UVOT	01h 22m 33.48s, +04° 36′ 28.1″
position:	(20.6395, +4.6078 ± 0.8″)
Galactic NHI:	3.27×1020 cm-2
Galactic E(B-V):	0.029 mag

Best RA:	01h 22m 33.48s	= 20.6395 d
Best Dec:	+04° 36′ 28.1″	= +4.6078 d
Gal Lat:	-57.39
Gal Long:	137.43
Sun angle:	126.73°, 8.6 hr West

---

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.

---

XRT SPER data

SPER results page for this trigger.

There are 8 SPER messages, and 1 objects have been found

• • Object 1 - enhanced position.
  • RA (J2000) : 01 22 33.52 (4.6078)
  • Dec (J2000): +04 36 28.0 ( 4.60805)
  • Error (90%): 1.9
  • Counts in Source: 218

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	Dec	Date reported	Source	Misc	Query
0.1′′	20.63950	4.60783		GCN #30664	GRB 210820A: Swift detection of a burst with an optical counterpart
0.2′′	20.63946	4.60781		GCN #30672	GRB 210820A: RATIR Optical Detections
0.2′′	20.63950	4.60786		GCN #30686	GRB 210820A: Swift/UVOT Detection
0.7′′	20.63962	4.60764		GCN #30667	GRB 210820A: Enhanced Swift-XRT position
136.9′′	20.62250	4.64183		GCN #30675	GRB 210820A: Swift-BAT refined analysis

There are 11 matches in total. See the full table for details.

---

Catalogue Searches. Searched 200′ 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).

SIMBAD

	RA*	Dec*	SIMBAD name		Query

* RA/Dec in equinox J2000

X-ray sources

	RA*	Dec*		Source table2	Observatory	Query

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*	Redshift		Catalogue	Query
2.6	20.6400	4.6075			NED
15.5	20.6412	4.6039			NED
18.5	20.6388	4.6028			NED
34.4	20.6475	4.6128			NED
39.0	20.6412	4.5972			NED
43.6	20.6383	4.5958			NED
44.3	20.6325	4.5975			NED
44.5	20.6317	4.6175			NED
44.7	20.6321	4.5975			NED
46.4	20.6296	4.5994			NED

Queried APM-N, SDSS, PSCz, SSS, NED, 2MASSX, USNO-B1.

There are 194 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

Stars

	RA*	Dec*		Catalogue	Query
39.6	20.6414	4.5972	B1=18.6, B2=19.0, I=17.2, R1=17.4, R2=18.0	USNO-B1
39.7	20.6413	4.5971	h=15.8, j=16.2, k=15.4	2MASS
44.2	20.6382	4.5958	B1=15.1, B2=16.2, I=13.9, R1=14.1, R2=14.5	USNO-B1
44.4	20.6382	4.5957	h=13.4, j=13.7, k=13.3	2MASS
45.0	20.6324	4.5977	B1=20.1, B2=20.3, I=16.1, R1=17.6, R2=18.1	USNO-B1
45.3	20.6324	4.5976	h=14.4, j=15.0, k=14.2	2MASS
46.7	20.6297	4.5995	B2=21.2, I=16.9, R1=18.9, R2=19.1	USNO-B1
46.9	20.6297	4.5994	h=15.2, j=15.8, k=14.9	2MASS
49.6	20.6430	4.6213	B1=19.9, B2=21.2, R2=20.1	USNO-B1
54.7	20.6285	4.5975	B2=21.3, R1=19.7, R2=20.0	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 71 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.