J/A+A/526/A155 SDSS surface photometry of M31 (Tempel+, 2011)
SDSS surface photometry of M31 with absorption corrections.
Tempel E., Tuvikene T., Tamm A., Tenjes P.
<Astron. Astrophys., 526, A155-155 (2011)>
=2011A&A...526A.155T 2011A&A...526A.155T
ADC_Keywords: Galaxies, photometry ; Photometry, CCD
Keywords: galaxies: individual: M31 - galaxies: photometry -
galaxies: fundamental parameters - dust, extinction -
techniques: image processing
Abstract:
The objective of this work is to obtain an extinction-corrected
distribution of optical surface brightness and colour indices of the
large nearby galaxy M31 using homogeneous observational data and a
model for intrinsic extinction.
We process the Sloan Digital Sky Survey (SDSS) images in ugriz
passbands and construct corresponding mosaic images, taking special
care of subtracting the varying sky background. We apply the galactic
model developed in Tempel et al. (2010A&A...509A..91T 2010A&A...509A..91T) and
far-infrared imaging to correct the photometry for intrinsic dust
effects.
We obtain observed and dust-corrected distributions of the surface
brightness of M31 and a map of line-of-sight extinctions inside the
galaxy. Our extinction model suggests that either M31 is intrinsically
non-symmetric along the minor axis or the dust properties differ from
those of the Milky Way. Assuming the latter case, we present the
surface brightness distributions and integral photometry for the Sloan
filters as well as the standard UBVRI system.
Description:
This dataset includes the maps of M31 in SDSS ugriz filters. We
include the observed maps and intrinsic attenuation corrected maps.
The detailed view of M31 is available at http://www.aai.ee/~elmo/m31/
Objects:
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RA (2000) DE Designation(s)
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00 42 44.3 +41 16 09 M31 = NGC 224
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
maps.dat 126 10 List of FITS maps
maps/* . 10 Individual FITS maps in SDSS filters u g r i z
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Byte-by-byte Description of file: maps.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- 23 F4.2 arcsec/pix Scale [3.96] Scale of the image
25- 28 I4 --- Nx [2300] Number of pixels along X-axis
30- 33 I4 --- Ny [7400] Number of pixels along Y-axis
35- 39 I5 Kibyte size [66490] Size of FITS file
41- 78 A38 --- FileName Name of FITS file in subdirectory maps
80-126 A47 --- Title Title of the file
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Acknowledgements:
Elmo Tempel, elmo.tempel(at)to.ee
References:
Tempel et al., 2010A&A...509A..91T 2010A&A...509A..91T, Dust-corrected surface photometry of
M31 from Spitzer far-infrared observations.
(End) Elmo Tempel [Tartu Obs., Estonia], Patricia Vannier [CDS] 12-Mar-2014