2018A&A...614A.134B


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.19CET16:58:36

2018A&A...614A.134B - Astronomy and Astrophysics, volume 614A, 134-134 (2018/6-1)

The ESO's VLT type Ia supernova spectral set of the final two years of SNLS.

BALLAND C., CELLIER-HOLZEM F., LIDMAN C., ASTIER P., BETOULE M., CARLBERG R.G., CONLEY A., ELLIS R.S., GUY J., HARDIN D., HOOK I.M., HOWELL D.A., PAIN R., PRITCHET C.J., REGNAULT N., SULLIVAN M., ARSENIJEVIC V., BAUMONT S., EL-HAGE P., FABBRO S., FOUCHEZ D., MITRA A., MOLLER A., MOURAO A.M., NEVEU J., ROMAN M. and RUHLMANN-KLEIDER V.

Abstract (from CDS):


Aims. We aim to present 70 spectra of 68 new high-redshift type Ia supernovae (SNe Ia) measured at ESO's VLT during the final two years of operation (2006-2008) of the Supernova Legacy Survey (SNLS). This new sample complements the VLT three year spectral set. Altogether, these two data sets form the five year sample of SNLS SN Ia spectra measured at the VLT on which the final SNLS cosmological analysis will partly be based. In the redshift range considered, this sample is unique in terms of homogeneity and number of spectra. We use it to investigate the possibility of a spectral evolution of SNe Ia populations with redshift as well as SNe Ia spectral properties as a function of lightcurve fit parameters and the mass of the host-galaxy.
Methods. Reduction and extraction are based on both IRAF standard tasks and our own reduction pipeline. Redshifts are estimated from host-galaxy lines whenever possible or alternatively from supernova features. We used the spectro-photometric SN Ia model SALT2 combined with a set of galaxy templates that model the host-galaxy contamination to assess the type Ia nature of the candidates.
Results. We identify 68 new SNe Ia with redshift ranging from z = 0.207 to z = 0.98 for an average redshift of z = 0.62. Each spectrum is presented individually along with its best-fit SALT2 model. Adding this new sample to the three year VLT sample of SNLS, the final dataset contains 209 spectra corresponding to 192 SNe Ia identified at the VLT. We also publish the redshifts of other candidates (host galaxies or other transients) whose spectra were obtained at the same time as the spectra of live SNe Ia. This list provides a new redshift catalog useful for upcoming galaxy surveys. Using the full VLT SNe Ia sample, we build composite spectra around maximum light with cuts in color, the lightcurve shape parameter ("stretch"), host-galaxy mass and redshift. We find that high-z SNe Ia are bluer, brighter and have weaker intermediate mass element absorption lines than their low-z counterparts at a level consistent with what is expected from selection effects. We also find a flux excess in the range [3000-3400] Å for SNe Ia in low mass host-galaxies (M < 1010M) or with locally blue U-V colors, and suggest that the UV flux (or local color) may be used in future cosmological studies as a third standardization parameter in addition to stretch and color.

Abstract Copyright: © ESO 2018

Journal keyword(s): cosmology: observations - supernovae: general - methods: data analysis - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/614/A134): tablea1.dat tablea2.dat tablea3.dat sp/*>

Simbad objects: 73

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Number of rows : 73

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 SNLS 07D1by SN* 02 24 05.44 -04 32 00.6           SNIa 1 0
2 SNLS 06D1jf SN* 02 24 17.47 -04 25 52.5           SNIa 1 0
3 SNLS 05D1if SN* 02 24 29.729 -04 34 13.22           SNIa 7 0
4 SNLS 06D1hi SN* 02 24 30.50 -04 11 39.4           SNIa: 1 0
5 SNLS 06D1kg SN* 02 24 32.57 -04 15 02.0           SNIa 3 0
6 SNLS 07D1ca SN* 02 24 47.20 -04 50 56.0           SNIa: 1 0
7 SNLS 06D1kh SN* 02 24 50.09 -04 42 30.6           SNIa: 1 0
8 SNLS 06D1cm SN* 02 25 01.91 -04 28 43.2           SNIa 1 0
9 SNLS 06D1eb SN* 02 25 03.05 -04 06 25.2           SNIa 1 0
10 SNLS 06D1dc SN* 02 25 09.01 -04 33 13.2           SNIa: 1 0
11 SNLS 07D1cc SN* 02 25 16.94 -04 06 49.7           SNIa 1 0
12 SNLS 06D1bg SN* 02 25 20.73 -04 06 58.2           SNIa: 1 0
13 SNLS 07D1cd SN* 02 25 33.96 -04 45 06.5           SNIa: 1 0
14 SNLS 06D1du SN* 02 25 40.88 -04 12 23.3           SNIa 1 0
15 SNLS 06D1ez SN* 02 25 41.00 -04 14 49.3           SNIa 1 0
16 SNLS 06D1fd SN* 02 25 54.43 -04 36 28.9           SNIa 1 0
17 SNLS 06D1cx SN* 02 26 02.59 -04 14 43.7           SNIa 1 0
18 SNLS 07D1bs SN* 02 26 04.32 -04 54 27.6           SNIa: 1 0
19 SNLS 06D1bo SN* 02 26 15.53 -04 20 58.6           SNIa 1 0
20 SNLS 06D1ix SN* 02 26 33.63 -03 59 03.8           SNIa 1 0
21 SNLS 07D1cf SN* 02 26 34.20 -04 58 52.3           SNIa 1 0
22 SNLS 07D1ab SN* 02 26 44.88 -04 01 00.7           SNIa 1 0
23 SNLS 06D1kf SN* 02 26 49.27 -04 10 10.1           SNIa 1 0
24 SNLS 06D1gl SN* 02 26 53.28 -04 46 29.8           SNIa 1 0
25 SNLS 07D1bu SN* 02 27 00.37 -04 32 32.9           SNIa 1 0
26 SNLS 06D1jz SN* 02 27 11.07 -04 26 25.8           SNIa 1 0
27 SNLS 07D1bl SN* 02 27 30.62 -04 40 21.2           SNIa 1 0
28 SNLS 07D1ah SN* 02 27 33.33 -04 06 54.3           SNIapec 1 0
29 SNLS 06D1dl SN* 02 27 38.39 -04 32 36.6           SNIa 1 0
30 SNLS 06D1fx SN* 02 27 41.89 -04 46 43.3           SNIa 1 0
31 SNLS 07D1ad SN* 02 27 44.72 -04 57 42.3           SNIa 1 0
32 SNLS 05D1hm SN* 02 27 46.217 -04 43 02.23         21.49 SNIa 8 0
33 SNLS 05D1dx SN* 02 27 46.990 -04 01 56.96         23.15 SNIa 8 0
34 SN 1999aa SN* 08 27 42.03 +21 29 14.8           SNIap 232 1
35 SNLS 07D2bd SN* 09 58 38.09 +02 07 35.4           SNIa 1 0
36 SNLS 06D2hm SN* 09 58 44.57 +02 19 58.7           SNIa 1 0
37 SNLS 07D2bi SN* 09 58 46.65 +02 40 29.9           SNIa 1 0
38 SNLS 07D2fy SN* 09 59 32.36 +02 18 00.9           SNIa 1 0
39 SNLS 06D2jw SN* 09 59 37.59 +02 34 18.4           SNIa: 1 0
40 SNLS 06D2hu SN* 09 59 56.99 +02 08 03.3           SNIa 1 0
41 SNLS 07D2ah SN* 09 59 58.16 +01 53 21.9           SNIa 1 0
42 SNLS 07D2bv SN* 10 00 06.62 +02 38 35.8           SLSN-I 19 0
43 SNLS 07D2ag SN* 10 00 09.01 +02 09 59.2           SNIa 1 0
44 SNLS 07D2fz SN* 10 00 13.41 +02 24 16.9           SNIa 1 0
45 SNLS 07D2ct SN* 10 00 17.00 +02 17 13.8           SNIa: 1 0
46 SNLS 07D2du SN* 10 00 30.20 +01 51 30.4           SNIa 1 0
47 SNLS 07D2cq SN* 10 00 47.03 +01 52 04.1           SNIa: 1 0
48 SNLS 06D2bo SN* 10 00 52.54 +02 03 22.9           SNIa: 2 0
49 SNLS 07D2cb SN* 10 01 27.40 +01 55 47.7           SNIa 1 0
50 SNLS 06D2ag SN* 10 01 43.363 +01 51 37.07           SNIa 6 0
51 SNLS 07D2ae SN* 10 01 50.58 +01 52 33.6           SNIa 1 0
52 SNLS 07D2bq SN* 10 01 51.86 +02 00 48.4           SNIa 1 0
53 SNLS 05D2le SN* 10 01 54.876 +02 05 34.48         25.95 SNIa 10 0
54 SNLS 07D2aa SN* 10 02 05.50 +02 25 43.4           SNIa 1 0
55 SNLS 07D2be SN* 10 02 08.40 +02 40 00.6           SNIa: 1 0
56 SNLS 07D2aw SN* 10 02 21.66 +02 27 06.6           SNIa: 1 0
57 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 534 1
58 SN 1991T SN* 12 34 10.20 +02 39 56.4   11.70 11.51     SNIapec 706 1
59 SNLS 07D4dq SN* 22 14 02.17 -17 48 43.4           SNIa 1 0
60 SNLS 07D4dp SN* 22 14 33.80 -17 25 58.9           SNIa: 1 0
61 SNLS 07D4dr SN* 22 14 43.06 -17 18 34.1           SNIa 1 0
62 SNLS 06D4jt SN* 22 14 45.52 -18 00 56.8           SNIa: 1 0
63 SNLS 07D4cy SN* 22 15 02.47 -17 37 43.2           SNIa: 1 0
64 SNLS 06D4bw SN* 22 15 03.723 -17 53 00.43         22.61 SNIa 8 0
65 SNLS 06D4gs SN* 22 15 14.80 -17 14 52.5           SNIa 1 0
66 SNLS 07D4ed SN* 22 15 18.55 -18 09 52.5           SNIa 1 0
67 SNLS 06D4bo SN* 22 15 28.113 -17 24 33.06         21.29 SNIa 8 0
68 SNLS 06D4jh SN* 22 15 31.24 -18 04 22.1           SNIa 1 0
69 SNLS 06D4ba SN* 22 15 35.737 -18 13 44.82         24.55 SNIa 8 0
70 SNLS 06D4eu SN* 22 15 54.291 -18 10 45.56           SNI 30 0
71 SNLS 07D4ec SN* 22 16 09.48 -18 02 18.8           SNIa 1 0
72 SNLS 07D4ei SN* 22 16 29.93 -17 32 05.1           SNIa 1 0
73 SNLS 07D4aa SN* 22 16 59.49 -17 52 03.3           SNIa 1 0

    Equat.    Gal    SGal    Ecl

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2021.01.19-16:58:36

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