J/ApJ/930/70 A compilation of optical spectra from 361 SNe Ia (Hu+, 2022)
Spectroscopic studies of type Ia supernovae using LSTM neural networks.
Hu L., Chen X., Wang L.
<Astrophys. J., 930, 70 (2022)>
=2022ApJ...930...70H 2022ApJ...930...70H
ADC_Keywords: Supernovae; Redshifts; Spectra, optical; References
Keywords: Supernovae ; Type Ia supernovae
Abstract:
We present a data-driven method based on long short-term memory (LSTM)
neural networks to analyze spectral time series of Type Ia supernovae
(SNeIa). The data set includes 3091 spectra from 361 individual SNeIa.
The method allows for accurate reconstruction of the spectral sequence
of an SN Ia based on a single observed spectrum around maximum light.
The precision of the spectral reconstruction increases with more
spectral time coverages, but the significant benefit of multiple epoch
data at around optical maximum is only evident for observations
separated by more than a week. The method shows great power in
extracting the spectral information of SNe Ia and suggests that the
most critical information of an SN Ia can be derived from a single
spectrum around the optical maximum. The algorithm we have developed
is important for the planning of spectroscopic follow-up observations
of future SN surveys with the LSST/Rubin and WFIRST/Roman telescopes.
Description:
We use the publicly available SN spectra from WISeREP
(Yaron & Gal-Yam 2012PASP..124..668Y 2012PASP..124..668Y), Kaepora
(Siebert+ 2019, J/MNRAS/486/5785), and a data set of high-quality
Very Large Telescope (VLT) observations of SNe Ia from the SN
polarimetry program (Wang & Wheeler 2008ARA&A..46..433W 2008ARA&A..46..433W ;
Cikota+ 2019MNRAS.490..578C 2019MNRAS.490..578C & Yang+ 2020, J/ApJ/902/46).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 361 Supernovae in the spectral dataset
refs.dat 78 58 References
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
J/AJ/131/1648 : Type Ia SNe at high and low redshifts (Blondin+, 2006)
J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)
J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007)
J/ApJ/686/749 : Improved cosmological constraints from SNe (Kowalski+, 2008)
J/A+A/500/L17 : Spectral flux ratio of SN Ia (Bailey+, 2009)
J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)
J/ApJS/183/109 : Cepheids in 3 host galaxies (Riess+, 2009)
J/ApJ/699/L139 : Spectral parameters of SNe Ia (Wang+, 2009)
J/ApJ/716/712 : HST light curves of six SNe and Union2 (Amanullah+, 2010)
J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)
J/A+A/529/L4 : Reddening law of type Ia supernovae (Chotard+, 2011)
J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011)
J/AJ/143/126 : Spectroscopy of nearby Type Ia supernovae (Blondin+, 2012)
J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)
J/MNRAS/425/1789 : Berkeley supernova Ia program. I. (Silverman+, 2012)
J/ApJ/746/85 : THe HST Cluster Supernova Survey. V. (Suzuki+, 2012)
J/ApJ/773/53 : Type Ia SNe spectroscopy by the CSP (Folatelli+, 2013)
J/MNRAS/433/2240 : SALT2 parameters & distances for SNe (Ganeshalingam+, 2013)
J/other/Sci/340.170 : Classifications of 188 SNe Ia (Wang+, 2013)
J/A+A/568/A22 : Joint analysis of the SDSS-II & SNLS SNe Ia (Betoule+, 2014)
J/ApJ/795/142 : Defining phot. peculiar SNe Ia (Gonzalez-Gaitan+, 2014)
J/A+A/561/A146 : SN 2010ae optical spectra (Stritzinger+, 2014)
J/ApJ/815/58 : Spectrophot. time series obs. of twin SNIa (Fakhouri+, 2015)
J/MNRAS/446/3895 : The rising light curves of Type Ia supernovae (Firth+, 2015)
J/ApJS/220/9 : CfAIR2: NIR light curves of Type Ia SNe (Friedman+, 2015)
J/MNRAS/452/4307 : From optical to IR photometry of SN 2013dy (Pan+, 2015)
J/ApJ/813/30 : UV-Opt light curves of the SNIa iPTF14bdn (Smitka+, 2015)
J/A+A/573/A2 : SN 2012Z spectra (Stritzinger+, 2015)
J/ApJS/219/13 : SNe Ia light curves for the LSQ-CSP sample (Walker+, 2015)
J/ApJS/220/20 : Si and Ca high-velocity features in SNe Ia (Zhao+, 2015)
J/ApJ/826/144 : Follow-up observations of SNIa ASASSN-14lp (Shappee+, 2016)
J/AJ/154/211 : CSP (DR3): photometry of low-z SNe Ia (Krisciunas+, 2017)
J/A+A/611/A58 : SN 2007on and SN 2011iv light curves (Gall+, 2018)
J/ApJ/869/167 : Improved empirical models for Type Ia SNe (Saunders+, 2018)
J/ApJ/859/101 : The supernovae Ia Pantheon sample (Scolnic+, 2018)
J/ApJ/863/90 : Optical and NIR LCs of the nearby SN 2017cbv (Wee+, 2018)
J/AJ/155/201 : SweetSpot DR1: SNeIa with WIYN+WHIRC (Weyant+, 2018)
J/ApJ/870/L1 : K2 obs. of type Ia supernova SN 2018oh (Dimitriadis+, 2019)
J/ApJ/885/85 : Automated DASH classif. for supernovae (Muthukrishna+, 2019)
J/ApJ/870/13 : K2 LC alternative analysis of ASASSN-18bt (Shappee+, 2019)
J/MNRAS/486/5785 : Type Ia supernova (Siebert+, 2019)
J/A+A/636/A46 : The SUGAR model. Training dataset (Leget+, 2020)
J/PASJ/72/89 : Hyper Suprime-Cam transients classif. (Takahashi+, 2020)
J/ApJ/905/94 : Classif. for PS1-MDS SNe with SuperRAENN (Villar+, 2020)
J/ApJ/904/14 : Optical and NIR observation of SN (Ia) 2017cbv (Wang+, 2020)
J/ApJ/902/46 : LCO network light curves of SN Ia 2018gv (Yang+, 2020)
J/ApJ/923/L8 : Follow-up phot. & sp. of SNIa 2020hvf (Jiang+, 2021)
J/ApJ/923/167 : SN 2018agk spectra and NIR-UV light curves (Wang+, 2021)
J/ApJ/924/35 : Optical spectra of type Ia SN 2015bq (Li+, 2022)
http://www.wiserep.org/ : WISeREP home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name SN identifier
17- 23 A7 --- sType SN subtype ("Ia-norm": 302 sources; "Ia-91bg":
27 sources; "Ia-91T": 12 sources; "Ia-99aa":
10 sources and "Iax": 10 sources)
25- 32 F8.6 --- z [0.0006/0.1] Spectroscopic redshift
34- 35 I2 --- Nsp [2/74] Number of spectra used
37- 42 F6.2 d Start [-14.87/26.42] Day of first epoch observation
44- 48 F5.2 d End [-8.36/32.98] Day of last epoch observation
50- 68 A19 --- Source Spectrum source ("Kaepora", "WISeREP" or "VLT")
70- 71 I2 --- r_z [1/20] Reference code for z (see refs.dat file)
73- 74 I2 --- MaxRef [2/58] Modified Julian Date of maximum
reference code (see refs.dat file)
76- 80 A5 --- PhotRef Photometry reference code(s) (see refs.dat file)
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference code
4- 23 A20 --- Auth First author's name(s)
25- 43 A19 --- BibCode Bibcode of the reference
45- 78 A34 --- Comm Comment
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 15-Mar-2024