J/ApJ/736/119 Pioneer 10/11 IPP sky brightness maps (Matsuoka+, 2011)
Cosmic optical background: the view from pioneer 10/11.
Matsuoka Y., Ienaka N., Kawara K., Oyabu S.
<Astrophys. J., 736, 119 (2011)>
=2011ApJ...736..119M 2011ApJ...736..119M
ADC_Keywords: Galactic pole, north ; Galactic pole, south ; Photometry, surface
Keywords: cosmic background radiation - cosmology: observations -
dark ages, reionization, first stars - dust, extinction -
galaxies: evolution - infrared: ISM
Abstract:
We present the new constraints on the cosmic optical background (COB)
obtained from an analysis of the Pioneer 10/11 Imaging
Photopolarimeter (IPP) data. After careful examination of data
quality, the usable measurements free from the zodiacal light are
integrated into sky maps at the blue (∼0.44um) and red (∼0.64um) band.
Accurate starlight subtraction is achieved by referring to all-sky
star catalogs and a Galactic stellar population synthesis model down
to 32.0mag. We find that the residual light is separated into two
components: one component shows a clear correlation with thermal 100um
brightness, while another betrays a constant level in the lowest 100um
brightness region. The presence of the second component is significant
after all the uncertainties and possible residual light in the Galaxy
are taken into account, and thus it most likely has the extragalactic
origin (i.e., the COB).
Description:
Pioneer 10/11 IPP sky brightness maps for the blue and red bands at
the Galactic latitudes b>+35deg and b←35deg. The maps are given in
multi-extension fits format, with the total, starlight, and diffuse
emission brightness and their errors as well as the number of
measurements used for the maps creation contained in the extensions.
Detailed descriptions are provided in the header units.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 48 4 List of fits maps
fits/* . 4 Individual fits maps giving the sky brightness in
blue and red as zenithal-equal-area (ZEA) projections
centered at North and South Galactic Poles
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See also:
J/A+A/372/276 : Polarization catalogue for NGP area (Berdyugin+, 2001)
J/A+AS/117/519 : Structures around the SGP (Escalera+, 1996)
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [G]
2- 7 F6.2 deg GLON Galactic longitude of center
8- 13 F6.2 deg GLAT Galactic latitude of center
15- 22 E8.3 arcsec/pix scale [1140] Scale of the image
24- 26 I3 pix Nx Number of pixels along X-axis
27 A1 --- --- [x]
28- 30 I3 pix Ny Number of pixels along Y-axis
32- 48 A17 --- FileName Name of FITS file in subdirectory "fits".
Each file contains 7 images (1)
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Note (1): the 7 images are:
#0 = total brightness (in 10-9erg.s-1.cm-2.Å-1.sr-1,
10-11W.m-2.nm-1.sr-1 in SI).
#1 = error on total brightness (same units as #0)
#2 = starlight brightness (same units as #0)
#3 = error on starlight brightness (same units as #2)
#4 = diffuse emission brightness (same units as #0)
#5 = error on diffuse emission brightness (same units as #4)
#6 = number of measurements used for creating the map
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 10-Jan-2013