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Swift Trigger: 540964

Presumed name: GRB 121209A

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

BAT	21h 47m 12.24s, -08° 14′ 38.4″
position:	(326.801, -8.244 ± 180″)
XRT	21h 47m 08.95s, -08° 14′ 06.4″
position:	(326.7873, -8.2351 ± 2.2″)
UVOT	No position available.
Galactic NHI:	3.81×1020 cm-2
Galactic E(B-V):	NED unavailable

Best RA:	21h 47m 08.95s	= 326.7873 d
Best Dec:	-08° 14′ 06.4″	= -8.2351 d
Gal Lat:	-42.56
Gal Long:	47.53
Sun angle:	68.23°, -4.7 hr East of Sun

¹Sper #3 auto processing.

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GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

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Sun angle for this burst.

UVOT data

Blink images with DSS (link via GSFC)

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XRT SPER data

SPER results page for this trigger.

There are 3 SPER messages, and 1 objects have been found

• • Object 1 - enhanced position.
  • RA (J2000) : 21 47 09.02 (-8.2344)
  • Dec (J2000): -08 14 03.7 ( -8.23344)
  • Error (90%): 2.4
  • Counts in Source: 260

See the SPER page for details of how this position was produced.

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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′′	326.78733	-8.23508		GCN #14049	GRB 121209A: GROND optical afterglow candidate
1.3′′	326.78725	-8.23544		GCN #14051	GRB 121209A: Enhanced Swift-XRT position
11.1′′	326.78917	-8.23262		GCN #14045	GRB 121209A: Swift detection of a burst
46.5′′	326.80000	-8.23217		GCN #14052	GRB 121209A: Swift-BAT refined analysis

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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).

SIMBAD

	RA*	Dec*	SIMBAD name		Query
177.0	326.8009	-8.1878	2MASX J21471221-0811161	B=17.01, H=12.658, J=13.517, K=12.462, R=15.55, g=16.560, i=15.134, r=15.585, u=18.461, z=14.772

* 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
13.4	326.7850	-8.2381		Mag=20.2	NED
15.7	326.7829	-8.2347		Mag=21.2	NED
16.7	326.7850	-8.2311		Mag=22.5	NED
21.1	326.7814	-8.2354		R=21.9, g=22.6, i=21.1, u=23.6, z=20.0	SDSS
28.0	326.7946	-8.2328		Mag=22.5	NED
28.0	326.7948	-8.2328		R=21.4, g=21.9, i=21.3, u=23.2, z=20.3	SDSS
28.9	326.7954	-8.2344		Mag=21.3	NED
33.7	326.7867	-8.2258		Mag=21.3	NED
34.7	326.7958	-8.2397		Mag=23.6	NED
34.8	326.7846	-8.2444		Mag=18.6	NED

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

There are 414 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
13.4	326.7851	-8.2381	I=19.7, R=19.8, g=20.2, u=21.3, z=19.5	SDSS
13.4	326.7850	-8.2381	B1=20.0, B2=20.4, R1=19.7, R2=19.5	USNO-B1
15.7	326.7829	-8.2346	I=21.0, R=20.9, g=21.2, u=21.8, z=20.7	SDSS
16.7	326.7850	-8.2310	I=21.8, R=21.8, g=22.5, u=22.9, z=21.7	SDSS
20.2	326.7928	-8.2362	I=25.0, R=23.8, g=25.4, u=26.4, z=20.6	SDSS
28.9	326.7954	-8.2344	I=19.5, R=20.0, g=21.3, u=22.9, z=19.1	SDSS
29.1	326.7954	-8.2345	B2=20.6, I=18.5, R1=19.6, R2=19.8	USNO-B1
31.6	326.7960	-8.2367	I=24.4, R=25.3, g=25.4, u=23.4, z=20.4	SDSS
33.3	326.7864	-8.2259	B2=20.9, R1=18.9	USNO-B1
33.7	326.7866	-8.2258	I=20.6, R=20.8, g=21.3, u=22.5, z=21.0	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 302 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.