J/ApJ/686/749 Improved cosmological constraints from SNe (Kowalski+, 2008)
Improved cosmological constraints from new, old, and combined supernova data
sets.
Kowalski M., Rubin D., Aldering G., Agostinho R.J., Amadon A.,
Amanullah R., Balland C., Barbary K., Blanc G., Challis P.J., Conley A.,
Connolly N.V., Covarrubias R., Dawson K.S., Deustua S.E., Ellis R.,
Fabbro S., Fadeyev V., Fan X., Farris B., Folatelli G., Frye B.L.,
Garavini G., Gates E.L., Germany L., Goldhaber G., Goldman B., Goobar A.,
Groom D.E., Haissinski J., Hardin D., Hook I., Kent S., Kim A.G.,
Knop R.A., Lidman C., Linder E.V., Mendez J., Meyers J., Miller G.J.,
Moniez M., Mourao A.M., Newberg H., Nobili S., Nugent P.E., Pain R.,
Perdereau O., Perlmutter S., Phillips M.M., Prasad V., Quimby R.,
Regnault N., Rich J., Rubenstein E.P., Ruiz-Lapuente P., Santos F.D.,
Schaefer B.E., Schommer R.A., Smith R.C., Soderberg A.M., Spadafora A.L.,
Strolger L.-G., Strovink M., Suntzeff N.B., Suzuki N., Thomas R.C.,
Walton N.A., Wang L., Wood-Vasey W.M., Yun J.L.,
(the Supernova Cosmology Project)
<Astrophys. J., 686, 749-778 (2008)>
=2008ApJ...686..749K 2008ApJ...686..749K
ADC_Keywords: Supernovae ; Redshifts ; Photometry, UBVRI
Keywords: cosmological parameters - cosmology: observations -
supernovae: general
Abstract:
We present a new compilation of Type Ia supernovae (SNe Ia), a new
data set of low-redshift nearby-Hubble-flow SNe, and new analysis
procedures to work with these heterogeneous compilations. This "Union"
compilation of 414 SNe Ia, which reduces to 307 SNe after selection
cuts, includes the recent large samples of SNe Ia from the Supernova
Legacy Survey and ESSENCE Survey, the older data sets, as well as the
recently extended data set of distant supernovae observed with the
Hubble Space Telescope (HST). A single, consistent, and blind analysis
procedure is used for all the various SN Ia subsamples, and a new
procedure is implemented that consistently weights the heterogeneous
data sets and rejects outliers. We present the latest results from
this Union compilation and discuss the cosmological constraints from
this new compilation and its combination with other cosmological
measurements (CMB and BAO).
Description:
The SN light curve data presented in this paper were obtained as part
of the SCP Nearby 1999 Supernova Campaign (Aldering
2000AIPC..522...75A 2000AIPC..522...75A) and was performed in collaboration with a number
of wide-field CCD imaging teams: EROS-II, NGSS, QUEST-I, NEAT, and
Spacewatch. Photometric follow-up observations were obtained with the
LICK 1m, YALO 1m, CTIO 0.9m, CTIO 1.5m, MARLY, Danish 1.5m, ESO 3.6m,
KPNO 2.1m, JKT 1m, CFHT 3.6m, KECK-I 10m, WIYN 3.5m, and MLO 1m
telescopes. These consist of UBVRI photometry with a nominal cadence
of 3-7 days. The follow-up observations were performed between
February and 1999 June, and additional reference images to determine
the contribution of host galaxy light contamination were obtained in
spring 2000.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 8 Summary of supernova coordinates and redshifts
table9.dat 88 114 Coordinates and magnitudes of tertiary
calibration stars
table10.dat 87 140 B,V,R,I observations of the 8 SNe of table1
table11.dat 65 414 Supernovae of the Union compilation
table12.dat 71 638 The photometric lightcurve data from the 42 SNe
of Perlmutter et al. (1999ApJ...517..565P 1999ApJ...517..565P)
42sne.dat 30 42 Simbad positions for the 42 SNe of Perlmutter
et al. (1999ApJ...517..565P 1999ApJ...517..565P)
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See also:
J/ApJ/666/674 : ESSENCE supernova survey (Miknaitis+, 2007)
J/ApJ/602/571 : High-redshift supernovae IRZ fluxes (Barris+, 2004)
J/ApJ/594/1 : High-z supernovae VRI mag and distances (Tonry+, 2003)
http://supernova.lbl.gov/Union : Supernova Cosmology Project home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- SN Supernova name (SN YYYYaa)
11- 12 I2 h RAh Hour of right ascension (J2000)
14- 15 I2 min RAm Minute of right ascension (J2000)
17- 21 F5.2 s RAs Second of right ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Degree of declination (J2000)
27- 28 I2 arcmin DEm Arcminute of declination (J2000)
30- 33 F4.1 arcsec DEs Arcsecond of declination (J2000)
35- 40 F6.4 --- z Heliocentric redshift (1)
42- 80 A39 --- r_SN IAUC bibcode(s)
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Note (1): The heliocentric redshift was determined using narrow host-galaxy
features for all but one SN. In the case of SN 1999aw: due to the
faintness of its host, the redshift was determined from the SN
spectra.
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- SN Supernova name
11- 12 I2 --- Seq Tertiary star number (1)
14- 15 I2 h RAh Hour of Right Ascension (J2000)
17- 18 I2 min RAm Minute of Right Ascension (J2000)
20- 24 F5.2 s RAs Second of Right Ascension (J2000)
26 A1 --- DE- Sign of the Declination (J2000)
27- 28 I2 deg DEd Degree of Declination (J2000)
30- 31 I2 arcmin DEm Arcminute of Declination (J2000)
33- 36 F4.1 arcsec DEs Arcsecond of Declination (J2000)
38- 43 F6.3 mag Vmag The V band magnitude
45- 49 F5.3 mag e_Vmag Uncertainty in V
51- 56 F6.4 mag B-V The (B-V) color index
58- 62 F5.3 mag e_B-V Uncertainty in B-V
64- 69 F6.4 mag V-R The (V-R) color index
71- 75 F5.3 mag e_V-R Uncertainty in V-R
77- 82 F6.4 mag V-I The (V-I) color index
84- 88 F5.3 mag e_V-I Uncertainty in V-I
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Note (1): Stars designation is <[KRA2008] SN YYYYaa NN> in Simbad.
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- SN Supernova name
11- 20 F10.2 d JD Julian Date of observation
22- 35 A14 --- Tel Telescope identification
37- 42 F6.3 mag Bmag ? The B band magnitude
44- 48 F5.3 mag e_Bmag ? Uncertainty in Bmag
50- 55 F6.3 mag Vmag ? The V band magnitude
57- 61 F5.3 mag e_Vmag ? Uncertainty in Vmag
63- 68 F6.3 mag Rmag ? The R band magnitude
70- 74 F5.3 mag e_Rmag ? Uncertainty in Rmag
76- 81 F6.3 mag Imag ? The I band magnitude
83- 87 F5.3 mag e_Imag ? Uncertainty in Imag
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- SN Supernova name (1)
8- 13 F6.4 --- z Redshift
15- 19 F5.2 mag Bmag ? The B band magnitude at maximum
21- 24 F4.2 mag e_Bmag ? Uncertainty in Bmag
26- 29 F4.2 --- s ? Time-scale stretch (2)
31- 34 F4.2 --- e_s ? Uncertainty in s
36- 40 F5.2 --- c ? Rest-frame color at maximum (2)
42- 45 F4.2 --- e_c ? Uncertainty in c
47- 51 F5.2 --- mu ? The µ correction (3)
53- 56 F4.2 --- e_mu ? Uncertainty in mu
58- 59 I2 --- r_SN Reference for SN (4)
61- 65 A5 --- Note Cut description (5)
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Note (1): Designations are , , or
<[RSC2007] HSTYYAaa> in Simbad.
Note (2): Rest-frame color at maximum defined as c=(B-V)[t=Bmax]+0.057 and
timescale stretch s from the spectral template based fit method of
Guy et al. (2005A&A...443..781G 2005A&A...443..781G).
Note (3): Color corrections from Tripp (1998A&A...331..815T 1998A&A...331..815T) where
µ=mmax-M+α(s-1)-βc
See section 4.2 for further details.
Note (4): References as follows:
1 = Hamuy et al. (1996AJ....112.2408H 1996AJ....112.2408H);
2 = Krisciunas et al. (2004AJ....127.1664K 2004AJ....127.1664K,2004AJ....128.3034K 2004AJ....128.3034K);
3 = Riess et al. (1999AJ....117..707R 1999AJ....117..707R);
4 = Jha et al. (2006AJ....131..527J 2006AJ....131..527J);
5 = this work;
6 = Riess et al. (1998AJ....116.1009R 1998AJ....116.1009R) + HZT (High-Z Team (Garnavich et al.
1998ApJ...509...74G 1998ApJ...509...74G; Schmidt et al. 1998ApJ...507...46S 1998ApJ...507...46S);
7 = Perlmutter et al. (1999ApJ...517..565P 1999ApJ...517..565P)
8 = Tonry et al. (2003, Cat. J/ApJ/594/1);
9 = Barris et al. (2003, Cat. J/ApJ/602/571);
10 = Knop et al. (2003ApJ...598..102K 2003ApJ...598..102K);
11 = Riess et al. (2007ApJ...659...98R 2007ApJ...659...98R ; <[RSC2007] HSTYYAaa> in Simbad);
12 = Astier et al. (2006A&A...447...31A 2006A&A...447...31A);
13 = Miknaitis et al. (2007, Cat. J/ApJ/666/674 ; in Simbad).
Note (5): Cut description as follows:
o = 3σ outlier;
p = insufficient early data
c = no color;
d = too few data points
f = fit not converged.
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Byte-by-byte Description of file: table12.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- SN Supernova name (SN YYYYaa)
11- 15 F5.3 --- z Redshift
17- 24 F8.2 d MJD-R Modified Julian Date of R band observation
26- 34 E9.2 --- RFlux Bessell R band flux (1)
36- 43 E8.2 --- e_RFlux The 1σ error in RFlux
45- 52 F8.2 d MJD-I ? Modified Julian Date of I band observation
54- 62 E9.2 --- IFlux ? Bessell I band flux (1)
64- 71 E8.2 --- e_IFlux ? The 1σ error in IFlux
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Note (1): Data is presented as flux, with a common zero-point of zp=30
magnitudes. Multiple data points for a given night were combined into
a single data point. Since reference images where used to subtract the
host galaxy light, the data points are correlated. We recommend using
the data from the web-link "http://supernova.lbl.gov/Union", which
includes the covariance matrix. More information about the SNe can be
found in Perlmutter et al. (1999ApJ...517..565P 1999ApJ...517..565P).
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Byte-by-byte Description of file: 42sne.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Simbad hour of right ascension (J2000)
4- 5 I2 min RAm Simbad minute of right ascension (J2000)
7- 10 F4.1 s RAs Simbad second of right ascension (J2000)
12 A1 --- DE- Simbad declination sign (J2000)
13- 14 I2 deg DEd Simbad degree of declination (J2000)
16- 17 I2 arcmin DEm Simbad arcminute of declination (J2000)
19- 20 I2 arcsec DEs Simbad arcsecond of declination (J2000)
22- 30 A9 --- SN Supernova name (SN YYYYaa)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 04-Jan-2011