J/MNRAS/384/1178 2MASS, SDSS and BVRI photometry for 825 stars (Bilir+, 2008)
Transformations between 2MASS, SDSS and BVRI photometric systems:
bridging the near-infrared and optical.
Bilir S., Ak S., Karaali S., Cabrera-Lavers A., Chonis T.S., Gaskell C.M.
<Mon. Not. R. Astron. Soc., 384, 1178-1188 (2008)>
=2008MNRAS.384.1178B 2008MNRAS.384.1178B
ADC_Keywords: Surveys ; Photometry, infrared
Keywords: surveys - catalogues - techniques: photometric
Abstract:
We present colour transformations for the conversion of the 2MASS
photometric system to the Johnson-Cousins UBVRI system and further
into the SDSS ugriz system. We have taken SDSS gri magnitudes of stars
measured with the 2.5-m telescope from SDSS Data Release 5 (DR5), and
BVRI and JHKs magnitudes from Stetson's catalogue (available at
http://www2.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/community/STETSON/archive/ )
and Cutri et al. (2MASS, 2003, Cat. II/246), respectively. We matched
thousands of stars in the three photometric systems by their
coordinates and obtained a homogeneous sample of 825 stars by the
following constraints, which are not used in previous transformations:
1) the data are de-reddened, 2) giants are omitted, and 3) the sample
stars selected are of the highest quality. We give metallicity,
population type, and transformations dependent on two colours. The
transformations provide absolute magnitude and distance determinations
which can be used in space density evaluations at short distances
where some or all of the SDSS ugriz magnitudes are saturated. The
combination of these densities with those evaluated at larger
distances using SDSS ugriz photometry will supply accurate Galactic
model parameters, particularly the local space densities for each
population.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 105 825 Johnson-Cousins, SDSS and 2MASS magnitudes of
the sample stars (825 total stars)
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
http://sdss.org : SDSS Home Page
http://www2.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/community/STETSON/archive/ :
Stetson catalog
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Name Star name
19- 25 F7.3 deg GLON Galactic longitude
27- 33 F7.3 deg GLAT Galactic latitude
35- 40 F6.3 mag Vmag ?=- Johnson V-apparent magnitude
42- 46 F5.3 mag B-V ?=- Johnson B-V colour index
48- 52 F5.3 mag R-I ?=- Johnson R-I colour index
54- 59 F6.3 mag gmag SDSS g-apparent magnitude
62- 66 F5.3 mag u-g SDSS u-g colour index
68- 72 F5.3 mag g-r SDSS g-r colour index
74- 78 F5.3 mag r-i SDSS r-i colour index
80- 85 F6.3 mag Jmag 2MASS J-apparent magnitude
88- 92 F5.3 mag J-H 2MASS J-H colour index
94- 99 F6.3 mag H-Ks 2MASS H-Ks colour index
101-105 F5.3 mag E(B-V) Reduced Ed(B-V) colour excess
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 10-Jul-2008