J/MNRAS/486/5785 Type Ia supernova (Siebert+, 2019) ================================================================================ Investigating the diversity of Type Ia supernova spectra with the open-source relational data base KAEPORA. Siebert M.R., Foley R.J., Jones D.O., Angulo R., Davis K., Duarte A., Strasburger E., Conlon M., Kazmi N., Nishimoto R., Schubert M., Sun L., Tippens R. =2019MNRAS.486.5785S (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Supernovae Keywords: supernovae: general Abstract: We present a public, open-source relational data base (we name kaepora) containing a sample of 4975 spectra of 777 Type Ia supernovae (SNe Ia). Since we draw from many sources, we significantly improve the spectra by inspecting these data for quality, removing galactic emission lines and cosmic rays, generating variance spectra, and correcting for the reddening caused by both MW and host-galaxy dust. With our data base, we organize this homogenized data set by 56 unique categories of SN-specific and spectrum-specific metadata. With kaepora, we produce composite spectra of subpopulations of SNe Ia and examine how spectral features correlate with various SN properties. These composite spectra reproduce known correlations with phase, light-curve shape, and host-galaxy morphology. With our large data set, we are also able to generate fine-grained composite spectra simultaneously over both phase and light-curve shape. The colour evolution of our composite spectra is consistent with other SN Ia template spectra, and the spectral properties of our composite spectra are in rough agreement with these template spectra with some subtle differences. We investigate the spectral differences of SNe Ia that occur in galaxies with varying morphologies. Controlling for light-curve shape, which is highly correlated with host-galaxy morphology, we find that SNe Ia residing in late-type and early-type galaxies have similar spectral properties at multiple epochs. However for SNe Ia in these different environments, their spectra appear to have Ca ii near-infrared triplet features that have slightly different strengths. Although this is apparent in the composite spectra and there is some difference in the populations as seen by individual spectra, this difference is not large enough to indicate differences in the underlying populations. All individual spectra and metadata are available in our open-source data base kaepora along with the tools developed for this investigation to facilitate future investigations of SN Ia properties. Description: Our data base currently contains 4975 spectra of 777 SNe Ia. The full sample is comprised of spectra from heterogeneous data sources. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file sources.dat 63 775 List of supernovae table1.dat 49 4975 Full spectral sample -------------------------------------------------------------------------------- See also: https://msiebert1.github.io/kaepora : KAEPORA Home Page Byte-by-byte Description of file: sources.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 15 A15 --- Name Supernova name 17- 18 I2 h RAh ? Simbad right ascension (J2000) 20- 21 I2 min RAm ? Simbad right ascension (J2000) 23- 27 F5.2 s RAs ? Simbad right ascension (J2000) 29 A1 --- DE- Simbad declination sign (J2000) 30- 31 I2 deg DEd ? Simbad declination (J2000) 33- 34 I2 arcmin DEm ? Simbad declination (J2000) 36- 39 F4.1 arcsec DEs ? Simbad declination (J2000) 41- 63 A23 --- SName Simbad Name -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 15 A15 --- Name Supernova name 17- 23 F7.1 d MJD ? Modified Julian Date (JD-2400000.5) 25- 29 F5.1 d Phase ? Phase of spectra 31- 35 F5.1 --- S/N ? Signal to noise ratio 37- 40 I4 0.1nm lambda1 Wavelenght range (minimum) 42- 46 I5 0.1nm lambda2 Wavelenght range (maximum) 48- 49 I2 --- Refs References for the spectra (1) -------------------------------------------------------------------------------- Note (1): References as follows: 1 = Foley, Filippenko & Jha (2008ApJ...686..117F) 2 = Silverman et al. (2012MNRAS.425.1789S, Cat. J/MNRAS/425/1789) 3 = Wells et al. (1994AJ....108.2233W) 4 = Filippenko et al. (1992AJ....104.1543F) 5 = Ruiz-Lapuente et al. (1993Natur.365..728R) 6 = Matheson et al. (2001AJ....121.1648M) 7 = Filippenko et al. (1992ApJ...384L..15F) 8 = Unknown 9 = Blondin et al. (2012AJ....143..126B, Cat. J/AJ/143/126) 10 = Ruiz-Lapuente et al. (eds, 1997 , Thermonuclear supernovae. Proceedings. NATO Advanced Science Institutes (ASI) Series C, Vol. 486, Springer, Netherlands) 11 = Patat et al. (1996MNRAS.278..111P) 12 = Salvo et al. (2001MNRAS.321..254S) 13 = Li et al. (1999AJ....117.2709L) 14 = Li et al. (2001ApJ...546..734L) 15 = Cappellaro et al. (2001ApJ...549L.215C) 16 = Modjaz et al. (2001PASP..113..308M) 17 = Gal-Yam et al. (2003AJ....125.1087G) 18 = Li et al. (2001PASP..113.1178L) 19 = Valentini et al. (2003ApJ...595..779V) 20 = Krisciunas et al. (2011AJ....142...74K) 21 = Leonard et al. (2005ApJ...632..450L) 22 = Benetti et al. (2004MNRAS.348..261B) 23 = Elias-Rosa et al. (2008MNRAS.384..107E, Cat. J/MNRAS/384/107) 24 = Li et al. (2003PASP..115..453L) 25 = Jha et al. (2006AJ....132..189J) 26 = Pignata et al. (2008MNRAS.388..971P) 27 = Kotak et al. (2005A&A...436.1021K) 28 = Elias-Rosa et al. (2006MNRAS.369.1880E, Cat. J/MNRAS/369/1880) 29 = Stanishev et al. (2007A&A...469..645S) 30 = Anupama, Sahu & Jose (2005A&A...429..667A) 31 = Folatelli et al. (2013ApJ...773...53F, Cat. J/ApJ/773/53) 32 = Leonard (eds, AIP Conf. Proc., Vol. 937. Supernova 1987A: 20 Years After: Supernovae and Gamma-Ray Bursters. Am. Inst. Phys, New York, p. 311) 33 = Wang et al. (2009ApJ...697..380W) 34 = Garavini et al. (2007A&A...471..527G) 35 = Chornock et al. (2006PASP..118..722C) 36 = Phillips et al. (2007PASP..119..360P) 37 = Foley et al. (2010ApJ...708.1748F) 38 = Thomas et al. (2007ApJ...654L..53T) 39 = Hicken et al. (2007ApJ...669L..17H) 40 = Ostman et al. (2011A&A...526A..28O, Cat. J/A+A/526/A28) 41 = Wang et al. (2008ApJ...675..626W) 42 = Yamanaka et al. (2009PASJ...61..713Y) 43 = Simon et al. (2007ApJ...671L..25S) 44 = Zhang et al. (2010PASP..122....1Z) 45 = Silverman et al. (2011MNRAS.410..585S, Cat. J/MNRAS/410/585) 46 = Pan et al. (2018MNRAS.479..517P) 47 = McCully et al. (2014ApJ...786..134M) 48 = Foley et al. (2009AJ....138..376F) 49 = Foley & Kirshner (2013ApJ...769L...1F) 50 = Pereira et al. (2013A&A...554A..27P, Cat. J/A+A/554/A27) 51 = Mazzali et al. (2014MNRAS.439.1959M) 52 = Amanullah et al. (2015MNRAS.453.3300A) 53 = Pan et al. (2015MNRAS.452.4307P, Cat. J/MNRAS/452/4307) 54 = Foley et al. (2016MNRAS.461.1308F) ------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Ana Fiallos [CDS] 08-Nov-2022