J/A+A/525/A138 All-sky Galactic radiation at 45MHz (Guzman+, 2011)
All-sky Galactic radiation at 45 MHz and spectral index between 45 and 408 MHz.
Guzman A.E., May J., Alvarez H., Meada K.
<Astron. Astrophys. 525, A138 (2011)>
=2011A&A...525A.138G 2011A&A...525A.138G
ADC_Keywords: Surveys ; Radio continuum
Keywords: Galaxy: structure - radio continuum: ISM -
radiation mechanisms: non-thermal - ISM: magnetic fields - cosmic rays
Abstract:
We study the Galactic large-scale synchrotron emission by generating a
reliable all-sky spectral index map and temperature map at 45MHz.
Description:
We use our observations, the published all-sky map at 408MHz, and a
bibliographical compilation to produce a map corrected for zero-level
offset and extragalactic contribution.
We present full sky maps of the Galactic emission at 45MHz and the
Galactic spectral index between 45 and 408MHz with an angular
resolution of 5°. The spectral index varies between 2.1 and 2.7,
reaching values below 2.5 at low latitude because of thermal free-free
absorption and its maximum in the zone next to the Northern Spur.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 84 2 List of fits files
fits/* . 2 Individual fits files
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Nx Number of pixels along X-axis
6- 8 I3 --- Ny Number of pixels along Y-axis
10- 13 I4 Kibyte size Size of FITS file
15- 26 A12 --- FileName Name of FITS file, in subdirectory fits
28- 84 A57 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Acknowledgements:
Andres Guzman, aguzman(at)das.uchile.cl
History:
10-Dec-2010: On-line version
02-Nov-2016: File b45-408.fits added
(End) Patricia Vannier [CDS] 09-Dec-2010