J/ApJ/634/L89 4.8GHz observations of SGR 1806-20 (Gelfand+, 2005)
A rebrightening of the radio nebula associated with the 2004 December 27 giant
flare from SGR 1806-20.
Gelfand J.D., Lyubarsky Y.E., Eichler D., Gaensler B.M., Taylor G.B.,
Granot J., Newton-McGee K.J., Ramirez-Ruiz E., Kouveliotou C.,
Wijers R.A.M.J.
<Astrophys. J., 634, L89-L92 (2005)>
=2005ApJ...634L..89G 2005ApJ...634L..89G (SIMBAD/NED BibCode)
ADC_Keywords: Pulsars ; Gamma rays ; Radio continuum
Keywords: pulsars: individual (SGR 1806-20) - neutrinos -
radio continuum: stars - shock waves -
stars: magnetic fields - stars: neutron
Abstract:
The 2004 December 27 giant γ-ray flare detected from the
magnetar SGR 1806-20 created an expanding radio nebula that we have
monitored with the Australia Telescope Compact Array and the Very
Large Array. These data indicate that there was an increase in the
observed flux 25 days after the initial flare that lasted for 8 days,
which we believe is the result of ambient material swept up and
shocked by this radio nebula.
Description:
As part of a long-term monitoring campaign of VLA J180839-202439, we
have observed this source every few days with both the Australia
Telescope Compact Array (ATCA) and the VLA. Here we focus on
observations at 4.8GHz from day 6 to day 63 after the outburst.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
18 08 39.3 -20 24 39 SGR 1806-20 = NAME SGR 1806-20
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 33 41 Radio observations at 4.8GHz of the radio nebula
produced by SGR 1806-20
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 "Y/M/D" ObsDate UT date of the average observational epoch
15- 19 F5.2 d Day [6.9/63] Days after Burst
21- 24 A4 --- Tel Telescope used ("ATCA", 28 occurrences
or "VLA")
26- 29 F4.1 mJy S4.8GHz [2.5/80] The 4.8GHz flux density (1)
31- 33 F3.1 mJy e_S4.8GHz [0.1/3] Uncertainty in S4.8GHz
--------------------------------------------------------------------------------
Note (1): Flux densities before 2005 Jan 18.01 are also reported in the
Supplementary Section of Gaensler+ (2005ApJ...620L..95G 2005ApJ...620L..95G).
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 24-Jul-2006