J/ApJ/659/122 Improved distances to type Ia supernovae (Jha+, 2007)
Improved distances to type Ia supernovae with multicolor light-curve shapes:
MLCS2k2.
Jha S., Riess A.G., Kirshner R.P.
<Astrophys. J., 659, 122-148 (2007)>
=2007ApJ...659..122J 2007ApJ...659..122J
ADC_Keywords: Supernovae ; Galaxies, nearby ; Stars, distances ;
Radial velocities
Keywords: cosmology: observations - distance scale -
galaxies: distances and redshifts - supernovae: general
Abstract:
We present an updated version of the multicolor light-curve shape
method to measure distances to Type Ia supernovae (SNe Ia),
incorporating new procedures for K-correction and extinction
corrections. We also develop a simple model to disentangle intrinsic
color variations and reddening by dust and expand the method to
incorporate U-band light curves and to more easily accommodate prior
constraints on any of the model parameters. We apply this method to
133 nearby SNe Ia, including 95 objects in the Hubble flow
(cz≥2500km/s), which give an intrinsic dispersion of less than 7% in
distance. The Hubble flow sample, which is of critical importance to
all cosmological uses of SNe Ia, is the largest ever presented with
homogeneous distances.
Description:
We have compiled modern multicolor photoelectric and CCD
Johnson/Cousins UBVRI data from a variety of sources. The precision of
SN Ia distances demands high-quality photometry, and we have relied
most heavily on large, homogeneous data sets, such as the observations
presented by Hamuy et al. (1996AJ....112.2408H 1996AJ....112.2408H) from the Calan/Tololo
survey (29 SNe Ia), as well as those of Riess et al.
(1999AJ....117..707R 1999AJ....117..707R) and Jha et al. (2006, Cat. J/AJ/131/527),
consisting of 22 and 44 SNe Ia, respectively, from the CfA monitoring
campaign.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 89 133 Supernova and host galaxy data
refs.dat 69 46 References
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- SN Supernova designation
8- 13 F6.2 deg GLON Galactic longitude of host galaxy
15- 20 F6.2 deg GLAT Galactic latitude of host galaxy
22- 26 I5 km/s cz Heliocentric cz radial velocity of host galaxy
28- 32 I5 km/s czLG LG cz radial velocity of host galaxy
34- 38 I5 km/s czCMB CMB cz radial velocity of host galaxy
40- 45 A6 --- MType Morphological type of host galaxy
47- 52 F6.1 arcsec Xpos Supernova offset relative to host galaxy
nucleus, in North direction
54- 59 F6.1 arcsec Ypos Supernova offset relative to host galaxy
nucleus, in East direction
61- 65 F5.1 d t1 Epoch of the first photometric observation,
relative to B maximum light, in the SN rest
frame
67- 71 A5 --- Filter Filters used
73- 77 F5.3 mag E(B-V) Milky Way dust reddening, from Schlegel et al.
(1998ApJ...500..525S 1998ApJ...500..525S)
79- 89 A11 --- Ref References, in refs.dat file
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 41 A18 --- Aut Author's name
43- 69 A27 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 24-Jan-2009