J/A+A/584/A122 Precessing jets of 1E1740.7-2942 (Luque-Escamilla+, 2015)
The precessing jets of 1E1740.7-2942.
Luque-Escamilla P.L., Marti J., Martinez-Aroza J.
<Astron. Astrophys. 584, A122 (2015)>
=2015A&A...584A.122L 2015A&A...584A.122L (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, X-ray
Keywords: stars: jets - ISM: jets and outflows - X-rays: binaries -
galaxies: jets - stars: individual: 1E 1740.7-2942
Abstract:
The source 1E 1740.7-2942 is believed to be one of the two
prototypical microquasars towards the Galactic center region whose
X-ray states strongly resemble those of Cygnus X-1. Yet, the bipolar
radio jets of 1E 1740.7-2942 are very reminiscent of a radio galaxy.
The true nature of the object has thus remained an open question for
nearly a quarter of a century.
Our main goal here is to confirm the Galactic membership of 1E
1740.7-2942 by searching for morphological changes of its extended
radio jets in human timescales. This work was triggered as a result of
recent positive detection of fast structural changes in the
large-scale jets of the very similar source GRS 1758-258.
We carried out an in-depth exploration of the Very Large Array public
archives and fully recalibrated all 1E 1740.7-2942 extended data
sets in the C configuration of the array. We obtained and analyzed
matching beam radio maps for five epochs, covering years 1992, 1993,
1994, 1997 and 2000, with an angular resolution of a few arcseconds.
Description:
Fits files of the Very Large Array (VLA) maps of the microquasar
source 1E 1740.7-2942 taken from 1992 to 2000 at the 6 cm wavelength
in the C configuration of the array. These images correspond to the
different panels of Fig. 2 and Fig. 4 in this A&A publication.
Coordinates are J2000 and pixel brightness is given in units of
Jy/beam.
Objects:
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RA (2000) DE Designation(s)
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17 43 54.83 -29 44 42.6 1E 1740.7-2942 = NAME GREAT ANNIHILATOR
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 113 5 List of fits files
fits/* . 5 Individual fits files
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 21 I2 --- Nx Number of pixels along X-axis
23- 25 I3 --- Ny Number of pixels along Y-axis
27- 36 A10 "date" Obs.Date Observation date
38- 48 E11.6 Hz Freq Frequency
50- 52 I3 Kibyte size Size of FITS file
54- 75 A22 --- FileName name of the fits file in subdirectory fits
77-113 A37 --- Title Title of the file
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Acknowledgements:
Pedro L. Luque-Escamilla, jmarti(at)ujaen.es
(End) P. Luque-Escamilla [Univ. of Jaen, Spain], P. Vannier [CDS] 06-Nov-2015