J/other/PASA/39.46 Pantheon+ SN Ia redshift and PV Data (Carr+, 2022)
The Pantheon+ analysis: Improving the redshifts and peculiar velocities of
type Ia supernovae used in cosmological analyses.
Carr A., Davis T.M., Scolnic D., Said K., Brout D., Peterson E.R.,
Kessler R.
<Publ. Astron. Soc. Australia, 39, 46 (2022)>
=2022PASA...39...46C 2022PASA...39...46C (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Galaxies, nearby ; Redshifts ; Combined data
Keywords: cosmology: theory - galaxies: distances and redshifts
Abstract:
We examine the redshifts of a comprehensive set of published Type Ia
supernovae, and provide a combined, improved catalogue with updated
redshifts. We improve on the original catalogues by using the most
up-to-date heliocentric redshift data available; ensuring all
redshifts have uncertainty estimates; using the exact formulae to
convert heliocentric redshifts into the Cosmic Microwave Background
(CMB) frame; and utilising an improved peculiar velocity model that
calculates local motions in redshift-space and more realistically
accounts for the external bulk flow at high-redshifts. We review 2607
supernova redshifts; 2285 are from unique supernovae and 322 are from
repeat-observations of the same supernova. In total, we updated 990
unique heliocentric redshifts, and found 5 cases of missing or
incorrect heliocentric corrections, 44 incorrect or missing supernova
coordinates, 230 missing heliocentric or CMB frame redshifts, and 1200
missing redshift uncertainties. The absolute corrections range between
10-8≤Δz≤0.038, and RMS(Δz)∼3x10-3. The sign of the
correction was essentially random, so the mean and median corrections
are small: 4x10^-4 and 4x10^-6 respectively. We examine the impact of
these improvements for H_0 and the dark energy equation of state w and
find that the cosmological results change by ΔH0=-0.12km/s/Mpc
and Δw=0.003, both significantly smaller than previously
reported uncertainties for H0 of 1.0km/s/Mpc and w of 0.04
respectively.
Description:
Redshift and related parameters for the 2285 publicly available Type
Ia supernovae and their hosts. Heliocentric redshifts are gathered
from a variety of sources, while coordinates are from the SN source
catalogues and/or updated from visual inspection. Peculiar velocities
are derived from CMB frame redshift and host coordinates where
possible, else SN coordinates.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 213 2287 Redshift, peculiar velocity and auxiliary
information for 2285 SNe Ia and host galaxies
--------------------------------------------------------------------------------
See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
II/256 : Sternberg Supernova Catalogue, 2004 version (Tsvetkov+, 2004)
II/333 : Sloan Digital Sky Survey-II Supernova Survey (Sako+, 2018)
II/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- SNID Supernova ID
17- 23 A7 --- IAUC IAU designated supernova ID
25- 54 A30 --- Host Name of supernova host
56- 65 F10.6 deg RAdeg Right ascension of the supernova (J2000)
67- 76 F10.6 deg DEdeg Declination of the supernova (J2000)
78- 88 F11.6 deg RAHdeg ? Right ascension of the host galaxy (J2000)
90- 99 F10.6 deg DEHdeg ? Declination of the host galaxy (J2000)
101-108 F8.6 --- zhel [0.0/2.26] Redshift in the heliocentric
(measured) frame (1)
110-117 F8.6 --- zcmb [0.0/2.27] Redshift in the CMB rest frame (1)
119-125 E7.2 --- e_zhel Uncertainty in redshift
127-133 F7.5 --- zHD [0.0/2.27] zcmb with peculiar velocity
correction
135-141 F7.5 --- e_zHD Peculiar velocity corrected zcmb
143-146 I4 km/s vpec Peculiar velocity
148-150 I3 km/s e_vpec Uncertainty in peculiar velocity
152-162 F11.6 deg RAGdeg ? Right ascension of the host-galaxy-group
centre (J2000) (2)
164-173 F10.6 deg DEGdeg ? Declination of the host-galaxy-group centre
(J2000) (2)
175-183 F9.6 --- zGhel [0.0/0.06]? Average redshift of
host-galaxy-group in the heliocentric
frame (2)
185-193 F9.6 --- zGcmb [0.0/0.06]? Average redshift of
host-galaxy-group in the CMB rest frame
195-202 F8.5 --- zGHD [0.0/0.06]? Host-galaxy-group peculiar
velocity corrected zGcmb
204-207 I4 km/s vpecG ? Peculiar velocity of the host-galaxy-group
209 A1 --- GFlag [0/1] Group flag (3)
211 A1 --- HFlag [0/1] Host flag (4)
213 A1 --- f_zhel [0/1] Redshift source flag (5)
--------------------------------------------------------------------------------
Note (1): Redshift either from host galaxy or supernova spectrum (less accurate
and precise); f_zhel flag differentiates these.
Note (2): Group values from companion paper Peterson et al.
(arxiv.org/abs/2110.03487)
Note (3): Group flag as follows:
0 = not in known group
1 = has group information
Note (4): Host flag as follows:
0 = Anonymous or unknown host galaxy
1 = has host galaxy/host coordinates
Note (5): Redshift source flag as follows:
0 = host galaxy
1 = supernova spectrum
--------------------------------------------------------------------------------
Acknowledgements:
Anthony Carr, anthony.carr(at)uq.net.au
(End) Anthony Carr [UQ, Australia], Patricia Vannier [CDS] 17-Oct-2022