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J/A+A/599/A29       MIR brightness contrast of Saturn's rings  (Fujiwara+, 2017)

Seasonal variation of radial brightness contrast of Saturn's rings viewed in mid-infrared by Subaru/COMICS. Fujiwara H., Morishima R., Fujiyoshi T., Yamashita T. <Astron. Astrophys. 599, A29 (2017)> =2017A&A...599A..29F (SIMBAD/NED BibCode)
ADC_Keywords: Solar system ; Planets ; Photometry, infrared Keywords: planets and satellites: rings - infrared: planetary systems Abstract: To investigate the mid-infrared (MIR) characteristics of Saturn's rings. We collected and analyzed MIR high spatial resolution images of Saturn's rings obtained in January 2008 and April 2005 with COMICS mounted on Subaru Telescope, and investigated the spatial variation in the surface brightness of the rings in multiple bands in the MIR. We also composed the spectral energy distributions (SEDs) of the C, B, and A rings and the Cassini Division, and estimated the temperatures of the rings from the SEDs assuming the optical depths. We find that the C ring and the Cassini Division were warmer than the B and A rings in 2008, which could be accounted for by their lower albedos, lower optical depths, and smaller self-shadowing effect. We also find that the C ring and the Cassini Division were considerably brighter than the B and A rings in the MIR in 2008 and the radial contrast of the ring brightness is the inverse of that in 2005, which is interpreted as a result of a seasonal effect with changing elevations of the sun and observer above the ring plane. Description: Brightness maps for Saturn's rings at 8.8, 9.7, 10.5, 11.7, 12.5, 17.7, 18.8, 20.5, and 24.5 micron observed with Subaru Telescope/COMICS in 2008 and at 12.5 and 24.5 micron in 2005 are provides as fits files. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file list.dat 44 11 List of fits images fits/* 0 11 Individual fits images
Byte-by-byte Description of file: list.dat
Bytes Format Units Label Explanations
1- 4 I4 yr Year Year of Observation (UT) 6- 10 A5 --- Filter Filter Name 12- 14 I3 --- Nx Number of pixels along X-axis 16- 18 I3 --- Ny Number of pixels along Y-axis 20- 22 I3 Kibyte FileSize Size of FITS file 24- 44 A21 --- FileName Name of FITS file, in subdirectory fits
Acknowledgements: Hideaki Fujiwara, hideaki(at)
(End) Patricia Vannier [CDS] 12-Dec-2016
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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