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Published May 20, 2024 | Version Published
Journal Article Open

Optical Spectroscopy of Type Ia Supernovae by the Carnegie Supernova Projects I and II

Creators

  • 1. ROR icon Las Campanas Observatory
  • 2. ROR icon National University of La Plata
  • 3. ROR icon Aarhus University
  • 4. ROR icon Texas A&M University
  • 5. ROR icon Florida State University
  • 6. ROR icon Carnegie Observatories
  • 7. ROR icon Virginia Tech
  • 8. ROR icon Institute of Space Sciences
  • 9. ROR icon Institut d'Estudis Espacials de Catalunya
  • 10. ROR icon Planetary Science Institute
  • 11. ROR icon Universität Hamburg
  • 12. ROR icon University of Oklahoma
  • 13. ROR icon University of La Serena
  • 14. ROR icon Southern Astrophysical Research Telescope
  • 15. ROR icon Goddard Space Flight Center
  • 16. ROR icon University of Chicago
  • 17. ROR icon Cerro Tololo Inter-American Observatory
  • 18. ROR icon American Public University System
  • 19. ROR icon European Southern Observatory
  • 20. ROR icon Millennium Institute of Astrophysics
  • 21. ROR icon Yale University
  • 22. ROR icon University of Copenhagen
  • 23. ROR icon Stockholm University
  • 24. ROR icon California Institute of Technology
  • 25. ROR icon Australian National University
  • 26. ROR icon The University of Texas at Austin
  • 27. ROR icon Liverpool John Moores University
  • 28. ROR icon Max Planck Institute for Astrophysics
  • 29. ROR icon University of California, Berkeley
  • 30. ROR icon Lawrence Berkeley National Laboratory
  • 31. ROR icon University of Tarapacá
  • 32. ROR icon Macquarie University
  • 33. ROR icon University of Hawaii at Manoa
  • 34. ROR icon Konkoly Observatory
  • 35. ROR icon Eötvös Loránd University
  • 36. ROR icon University of Szeged
  • 37. ROR icon Laboratoire de Physique Nucléaire et de Hautes Énergies
  • 38. ROR icon University of Chile
  • 39. ROR icon Diego Portales University

Abstract

We present the second and final release of optical spectroscopy of Type Ia supernovae (SNe Ia) obtained during the first and second phases of the Carnegie Supernova Project (CSP-I and CSP-II). The newly released data consist of 148 spectra of 30 SNe Ia observed in the course of CSP-I and 234 spectra of 127 SNe Ia obtained during CSP-II. We also present 216 optical spectra of 46 historical SNe Ia, including 53 spectra of 30 SNe Ia observed by the Calán/Tololo Supernova Survey. We combine these observations with previously published CSP data and publicly available spectra to compile a large sample of measurements of spectroscopic parameters at maximum light, consisting of pseudo-equivalent widths and expansion velocities of selected features for 232 CSP and historical SNe Ia (including more than 1000 spectra). Finally, we review some of the strongest correlations between spectroscopic and photometric properties of SNe Ia. Specifically, we define two samples: one consisting of SNe Ia discovered by targeted searches (most of them CSP-I objects) and the other composed of SNe Ia discovered by untargeted searches, which includes most of the CSP-II objects. The analyzed correlations are similar for both samples. We find a larger incidence of SNe Ia belonging to the cool and broad-line Branch subtypes among the events discovered by targeted searches, shallow-silicon SNe Ia are present with similar frequencies in both samples, while core normal SNe Ia are more frequent in untargeted searches.

Copyright and License

© 2024. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Acknowledgement

The work of the CSP has been supported by the National Science Foundation under grants AST0306969, AST0607438, AST1008343, AST1613426, AST1613455, and AST1613472. CSP-II was also supported in part by funding from the Danish Villum FONDEN (grant Nos. 13261 and 28021) and the Independent Research Fund Denmark (IRFD) by a Sapere Aude II Fellowship awarded to M.D.S. Additional IRFD funding comes from Project 1 (8021-00170B) and Project 2 (10.46540/2032-00022B) grants. This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, the Gemini South, Cerro Pachón, Chile, and Gemini North, Maunakea, Hawaii (Gemini Program Nos. GS-2011B-Q-15-150-002 and GN-2013A-Q-68-82-002). Also based on observations collected at the European Organization for Astronomical Research in the Southern Hemisphere, Chile (ESO Programs 164.H-0376 and 0102.D-0095). C.G. is supported by a research grant (25501) by the Villum FONDEN. M.H. acknowledges support from FONDECYT-Chile through grants 92/0312 and 1060808; the National Science Foundation through grants GF-1002-96 and GF-1002-97; the Association of Universities for Research in Astronomy, Inc., under NSF Cooperative Agreement AST-8947990 and from Fundación Andes under project C-12984; the Hubble Fellowship grant HST-HF-01139.01-A (awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS 5-26555); and the Carnegie Postdoctoral Fellowship. This work has been funded by ANID, Millennium Science Initiative, ICN12_009. L.G. acknowledges financial support from the Spanish Ministerio de Ciencia e Innovación (MCIN), the Agencia Estatal de Investigación (AEI) 10.13039/501100011033, and the European Social Fund (ESF) "Investing in your future" under the 2019 Ramón y Cajal program RYC2019-027683-I and the PID2020-115253GA-I00 HOSTFLOWS project, from Centro Superior de Investigaciones Científicas (CSIC) under the PIE project 20215AT016, and the program Unidad de Excelencia María de Maeztu CEX2020-001058-M. C.A. acknowledges support by NASA grants JWST-GO-02114, JWST-GO-02122, and JWST-GO-04436.024-A; and JPL grant SS03-17-23. The research of J.C.W. and J.V. is supported by NSF AST-1813825. J.V. is also supported by OTKA grant K-142534 of the National Research, Development and Innovation Office, Hungary. The authors want to thank an anonymous referee for their kind report and useful suggestions.

Facilities

Magellan:Baade (IMACS imaging spectrograph) - , Magellan:Clay - Magellan II Landon Clay Telescope (LDSS3, MagE, MIKE), Du Pont (WFCCD, B&C spectrograph, MODSPEC), ESO 3.6 m (EFOSC-2), NTT (EMMI), ESO 1.52 m (B&C spectrograph), VLT:Yepun (MUSE), NOT (ALFOSC), Gemini:South (GMOS), Gemini:Gillett (GMOS), CTIO 1.0 m (B&C spectrograph), CTIO 1.5 m (R-C spectrograph), Blanco (R-C spectrograph), UH 2.2 m, KPNO 2.1 m (Gold camera), MMT (red channel), Shane (Cassegrain spectrograph), Nickel (Cassegrain spectrograph), FLWO 1.5 m (Z- Machine), ESO:Schmidt (QUEST camera), SO:Schmidt, Uppsala Schmidt, SO:1.5m, PO:1.2m, OGLE, ASAS-SN, PS1, Kiso:Schmidt, ISSP, MASTER, Skymapper, CTIO:Schmidt, CTIO:0.9m

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Additional details

Identifiers

ISSN
1538-4357

Funding

National Science Foundation
AST-0306969
National Science Foundation
AST-0607438
National Science Foundation
AST-1008343
National Science Foundation
AST-1613426
National Science Foundation
AST-1613455
National Science Foundation
AST-1613472
Villum Fonden
13261
Villum Fonden
28021
Danmarks Frie Forskningsfond
8021-00170B
Danmarks Frie Forskningsfond
10.46540/2032-00022B
Villum Fonden
25501
Fondo Nacional de Desarrollo Científico y Tecnológico
92/0312
Fondo Nacional de Desarrollo Científico y Tecnológico
1060808
National Science Foundation
GF-1002-96
National Science Foundation
GF-1002-97
National Science Foundation
AST-8947990
National Aeronautics and Space Administration
NASA Hubble Fellowship HST-HF-01139.01-A
National Aeronautics and Space Administration
NAS 5-26555
Carnegie Institution for Science
Agencia Nacional de Investigación y Desarrollo
ICN12_009
Agencia Estatal de Investigación
10.13039/501100011033
Ministerio de Ciencia, Innovación y Universidades
Ramón y Cajal program RYC2019-027683-I
Ministerio de Ciencia, Innovación y Universidades
PID2020-115253GA-I00
Consejo Superior de Investigaciones Científicas
20215AT016
Ministerio de Ciencia, Innovación y Universidades
CEX2020-001058-M
National Aeronautics and Space Administration
JWST-GO-02114
National Aeronautics and Space Administration
JWST-GO-02122
National Aeronautics and Space Administration
JWST-GO-04436.024-A
Jet Propulsion Laboratory
SS03-17-23
National Science Foundation
AST-1813825
National Research, Development and Innovation Office
K-142534

Caltech Custom Metadata

Caltech groups
Astronomy Department