Type Ia SNe spectroscopy by the CSP : J/ApJ/773/53

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Authors : Folatelli G. orcid , Morrell N., Phillips M.M. (hide) , Morrell N., Phillips M.M. et..al

VizieR DOI : 10.26093/cds/vizier.17730053
Bibcode : 2013ApJ...773...53F (ADS) (Simbad) (Objects)
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CDS Keywords : Supernovae; Spectroscopy; Equivalent widths; Redshifts
UAT : Supernovae, Spectroscopy, Line intensities, Redshifted

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Inserted into VizieR : 18-Mar-2015
Last modification : 27-Jun-2017

Spectroscopy of type Ia supernovae by the Carnegie Supernova Project. (2013)

Keywords : galaxies distances and redshifts; supernovae: general; techniques: spectroscopic

Abstract:This is the first release of optical spectroscopic data of low-redshift Type Ia supernovae (SNe Ia) by the Carnegie Supernova Project including 604 previously unpublished spectra of 93 SNe Ia. The observations cover a range of phases from 12 days before to over 150 days after the time of B-band maximum light. With the addition of 228 near-maximum spectra from the literature, we study the diversity among SNe Ia in a quantitative manner. For that purpose, spectroscopic parameters are employed such as expansion velocities from spectral line blueshifts and pseudo-equivalent widths (pW). The values of those parameters at maximum light are obtained for 78 objects, thus providing a characterization of SNe Ia that may help to improve our ...(more)
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We present optical spectroscopic data for a sample of 93 SNe Ia observed by the Carnegie Supernova Project (CSP; Hamuy et al. 2006PASP..118....2H) between 2004 and 2009. The data set amounts to 832 optical spectra, 569 of which were obtained by the CSP, 35 were provided by other observers, and 228 were taken from the literature. Most of the data were obtained with the 2.5m du Pont Telescope at Las Campanas Observatory, using the Wide Field CCD Camera (WFCCD) in long-slit spectroscopy mode. Other instruments used to improve our spectroscopic time coverage were the Las Campanas Modular Spectrograph at the du Pont, the Low Dispersion Survey Spectrograph (LDSS2) on the Magellan Clay 6.5m telescope, and the Ritchey-Chretien spectrograph at the 1.5m CTIO telescope, operated by the SMARTS consortium. In addition to these, more recently we have also employed, at Las Campanas: LDSS3 on the Magellan Clay telescope (an upgrade of LDSS2, with new grisms and different long slits); the Inamori Magellan Areal Camera and Spectrograph (IMACS) on the Magellan Baade 6.5m telescope; the Boller and Chivens spectrograph at the du Pont telescope; and finally, a few spectra have been obtained using the Magellan Echellette (MagE) spectrograph on the Magellan Clay telescope. We have also obtained single nights with the New Technology Telescope (NTT) and the 3.6m Telescope at ESO-La Silla, using the ESO Multi-Mode Instrument (EMMI) in medium resolution spectroscopy mode (at the NTT) and the ESO Faint Object Spectrograph and Camera (EFOSC) at the 3.6m and NTT telescopes. A few spectra have been obtained with the Gemini Multi-Object Spectrograph (GMOS) mounted on the Gemini South Telescope. In Table 2, we provide a complete journal of the spectroscopic observations considered in this work. Table 1 lists the sample of SNe Ia selected for this work along with the amount and span of spectroscopy epochs, and spectral classification as defined in Section 4. 


                


                

                    

                


                

                    

                


                

                    
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