J/AJ/135/1598 Optical spectroscopy of type Ia supernovae (Matheson+, 2008)
Optical spectroscopy of type Ia supernovae.
Matheson T., Kirshner R.P., Challis P., Jha S., Garnavich P.M., Berlind P.,
Calkins M.L., Blondin S., Balog Z., Bragg A.E., Caldwell N.,
Concannon K.D., Falco E.E., Graves G.J.M., Huchra J.P., Kuraszkiewicz J.,
Mader J.A., Mahdavi A., Phelps M., Rines K., Song I., Wilkes B.J.
<Astron. J., 135, 1598-1615 (2008)>
=2008AJ....135.1598M 2008AJ....135.1598M
ADC_Keywords: Supernovae
Keywords: supernovae: general - surveys
Abstract:
We present 432 low-dispersion optical spectra of 32 Type Ia supernovae
(SNe Ia) that also have well-calibrated light curves. The coverage
ranges from 6 epochs to 36 epochs of spectroscopy. Most of the data
were obtained with the 1.5m Tillinghast telescope at the F.L. Whipple
Observatory with typical wavelength coverage of 3700-7400Å and a
resolution of ∼7Å. B-band maximum; two-thirds of the SN B-band
maximum; two-thirds of the SNe were observed before maximum
brightness. Coverage for some SNe continues almost to the nebular
phase. The consistency of the method of observation and the technique
of reduction makes this an ideal data set for studying the
spectroscopic diversity of SNe Ia.
Description:
The majority of the spectra presented in this paper were obtained with
the 1.5m Tillinghast telescope at FLWO using the FAST spectrograph.
Spectroscopic observations with the Tillinghast (both low-dispersion
with FAST such as are discussed here and high-dispersion echelle
spectra) are made in a queue-scheduled mode.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 43 32 SN Ia and host basic data
table2.dat 118 432 Journal of observations
std.dat 125 14 Flux standard used
codes.dat 23 22 Observer codes
--------------------------------------------------------------------------------
See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- --- [SN]
4- 9 A6 --- SN Supernova identification
11- 22 A12 --- Host Host galaxy
23- 25 A3 --- OName Other name of host galaxy
26- 30 I5 km/s czh Heliocentric redshift of host galaxy (1)
32- 37 A6 --- MHost Host morphology (2)
39- 43 F5.3 mag E(B-V) Galactic colour excess (3)
--------------------------------------------------------------------------------
Note (1): Heliocentric redshifts listed are from the Updated Zwicky Catalog
(Falco et al., 1999, Cat. J/PASP/111/438) if possible, and from the
NASA/IPAC Extragalactic Database (NED) if not. For the host of SN
2000cf (MCG+11-19-25), we derived the velocity of 10920km/s from our
own spectra of the host galaxy.
Note (2): Host galaxy morphology is taken from NED, if possible, and from
the LEDA database if not.
Note (3): The Galactic reddening toward each SN is derived from the dust
maps of Schlegel et al. (1998ApJ...500..525S 1998ApJ...500..525S).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- --- [SN]
4- 9 A6 --- SN Supernova identification (1)
11- 23 A13 --- ObsDate UT date of the observation, in YYYY/MM/DD.dd (2)
25- 34 F10.2 d HJD Heliocentric Julian Date of observation (2)
36- 40 F5.1 --- Phase Phase of spectrum (3)
42- 45 A4 --- Tel Telescope code (4)
47- 50 I4 0.1nm lam.0 Lower wavelength range in Angstroms
52- 57 F6.1 0.1nm lam.1 Upper wavelength range in Angstroms
59- 61 F3.1 0.1nm Res Approximate spectral resolution; FWHM
63 A1 --- f_PA [p] Slit positioned to the parallactic angle
65- 69 F5.1 deg PA [-90/155]? Position angle
71- 77 F7.2 deg <Par> Average parallactic angle during observation
79- 82 F4.2 --- Air Airmass
84- 92 A9 --- FStd Flux standard used, in std.dat file
94- 96 A3 arcsec Seeing Seeing based on observer estimate
98 I1 arcsec Slit Slit width
100-107 A8 s Exp Exposure(s) duration
109-118 A10 --- OCode Observer(s) code, in codes.dat file
--------------------------------------------------------------------------------
Note (1): For nights when multiple observations were taken at the same
telescope, either as repeated exposures with the same setup or
observations with different grating tilts, only a single observation
is reported, with all relevant information described in this Table
representing the overall mid-point of the observations. When
observations of the same SN were made on the same night with two
different telescopes, we list them separately in this Table, but
only show a combined spectrum in the figures.
Note (2): at midpoint of observation(s).
Note (3): Relative to B-band maximum, rounded to the nearest half day.
The heliocentric Julian date for B-band maximum is taken from Table 4
of Jha et al. (2007, Cat. J/ApJ/659/122) for all of the SNe except
SN 2000cx, for which the date of B-band maximum from Li et al.
(2001PASP..113.1178L 2001PASP..113.1178L) is used. The phase has also been corrected for
relativistic time dilation using the recession velocity of the host
galaxy as listed in Table 1.
Note (4): Telescope code as follows:
FLWO = F.L. Whipple Observatory
MMTO = MMT Observatory
--------------------------------------------------------------------------------
Byte-by-byte Description of file: std.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Code Code
7 A1 --- --- [=]
9-125 A117 --- Com Standard + references
--------------------------------------------------------------------------------
Byte-by-byte Description of file: codes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- Code Code
4 A1 --- --- [=]
6- 23 A18 --- ObsName Observer name
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 06-Nov-2010