J/A+A/627/A174 Early light curve of SN 2013gy (Holmbo+, 2019)
Discovery and progenitor constraints on the Type Ia supernova 2013gy.
Holmbo S., Stritzinger M.D., Shappee B.J., Tucker M.A., Zheng W., Ashall C.,
Phillips M.M., Contreras C., Filippenko A.V., Hoeflich P., Huber M.,
Piro A.L., Wang X.F., Zhang J.-J., Anais J., Baron E., Burns C.R.,
Campillay A., Castellon S., Corco C., Hsiao E.Y., Krisciunas K., Morrell N.,
Nielsen M.T.B., Persson S.E., Taddia F., Tomasella L., Zhang T.-M.,
Zhao X.-L.
<Astron. Astrophys. 627, A174 (2019)>
=2019A&A...627A.174H 2019A&A...627A.174H (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Spectroscopy
Keywords: supernovae: general - supernovae: individual: SN 2013gy
Abstract:
We present an early-phase g-band light curve and visual-wavelength
spectra of the normal Type Ia supernova (SN) 2013gy. The light curve
is constructed by determining the appropriate S-corrections to
transform KAIT natural-system B- and V-band photometry and Carnegie
Supernova Project natural-system g-band photometry to the Pan-STARRS1
g-band natural photometric system. A Markov chain Monte Carlo
calculation provides a best-fit single power-law function to the first
ten epochs of photometry described by an exponent of 2.16+0.060.06
and a time of first light of MJD 56629.4+0.10.1, which is
1.93+0.120.13 days (i.e., <48hr) before the discovery date (2013
December 4.84 UT) and -19.10+0.120.13 days before the time of
B-band maximum (MJD 56648.50.1). The estimate of the time of first
light is consistent with the explosion time inferred from the
evolution of the SiII 6355 Doppler velocity. Furthermore, discovery
photometry and previous nondetection limits enable us to constrain the
companion radius down to Rc≤4R☉. In addition to our early-time
constraints, we used a deep +235 day nebular-phase spectrum from
Magellan/IMACS to place a stripped H-mass limit of <0.018M☉.
Combined, these limits effectively rule out H-rich nondegenerate
companions.
Description:
24 spectra of SN 2013gy.
Objects:
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RA (2000) DE Designation(s)
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03 42 16.88 -04 43 18.5 SN 2013gy = PSN J03421688-0443185
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 103 24 Journal of spectroscopic observations and
list of spectra
sp/* . 24 Individual spectra
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- FileName Name of the spectrum file in subdirectory sp
13- 25 A13 "datime" Obs.date Observation date
27- 33 F7.1 d MJD Modifiate Julian date
35- 40 F6.1 d Phase Phase (1)
42- 81 A40 --- Tel Telescope
83- 88 A6 --- Inst Instrument
89 A1 --- n_Inst [c] Note on Inst (2)
91- 95 I5 km/s mVabs ?=- -vabs SiII λ6355
96 A1 --- --- [+]
97- 99 I3 km/s E_mVabs ? Error on mVabs (upper value)
100 A1 --- --- [-]
101-103 I3 km/s e_mVabs ? Error on mVabs (lower value)
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Note (1): phase given in days with respect to the time of B-band maximum light
on MJD=56648.5±0.10, i.e., 2013 December 22.
Note (2): c: Spectra were published by Graham et al. (2017MNRAS.472.3437G 2017MNRAS.472.3437G).
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Byte-by-byte Description of file: sp/*
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Bytes Format Units Label Explanations
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1- 24 E24.18 0.1nm lambda Wavelength in Angstroems
26- 50 E25.18 10-2W/m2/nm Flux Flux in units of erg/s/cm2/Angstroems
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Acknowledgements:
Simon Holmbo, simonholmbo(at)phys.au.dk
References:
Graham et al., 2017MNRAS.472.3437G 2017MNRAS.472.3437G,
Nebular-phase spectra of nearby Type Ia Supernovae
(End) Simon Holmbo [Aarhus University], Patricia Vannier [CDS] 08-Jul-2019