J/ApJ/927/61 Spectroscopic follow-up of Type Ib SN 2017iro (Kumar+, 2022)
Investigating the observational properties of type Ib supernova SN 2017iro.
Kumar B., Singh A., Sahu D.K., Anupama G.C.
<Astrophys. J., 927, 61 (2022)>
=2022ApJ...927...61K 2022ApJ...927...61K
ADC_Keywords: Supernovae; Spectra, optical
Keywords: Type Ib supernovae ; Supernovae ; Core-collapse supernovae
Abstract:
We report results of optical imaging and low-resolution spectroscopic
monitoring of supernova (SN) 2017iro that occurred in the nearby
(∼31Mpc) galaxy NGC 5480. The HeIλ5876 feature present in the
earliest spectrum (-7d) classified it as a Type Ib SN. The follow-up
observations span from -7 to +266d with respect to the B-band maximum.
With a peak absolute magnitude in V band MV=-17.76±0.15mag and
bolometric luminosity log10L=42.39±0.09erg/s, SN 2017iro is a
moderately luminous Type Ib SN. The overall light-curve evolution of
SN 2017iro is similar to that of SN 2012au and SN 2009jf during the
early (up to ∼100d) and late phases (>150d), respectively. The line
velocities of both FeIIλ5169 and HeIλ5876 are ∼9000km/s
near the peak. The analysis of the nebular phase spectrum (~+209d)
indicates an oxygen mass of ∼0.35M☉. The smaller [OI]/[CaII]
flux ratio of ∼1 favors a progenitor with a zero-age main-sequence
mass in the range ∼13-15M☉, most likely in a binary system,
similar to the case of iPTF13bvn. The explosion parameters are
estimated by applying different analytical models to the
quasi-bolometric light curve of SN 2017iro. 56Ni mass synthesized in
the explosion has a range of ∼0.05-0.10M☉, ejecta mass
∼1.4-4.3M☉, and kinetic energy ~(0.8-1.9)x1051erg.
Description:
The photometric follow-up of SN 2017iro started just after the
announcement of its discovery, i.e., 2017 December 1 (JD2458089.5),
and continued up to 2018 August 31 (JD2458362.1). These observations
were performed in Bessell UBVRI bands with the Himalayan Faint Object
Spectrograph Camera (HFOSC), mounted on the f/9 Cassegrain focus of
the 2m Himalayan Chandra Telescope (HCT) of Indian Astronomical
Observatory (IAO), Hanle, India.
Low-resolution optical spectroscopic observations of SN2017iro were
obtained at 34 epochs from 2017-Dec-01 (JD2458089.4) to 2018-Jul-05
(JD2458305.2). Two grisms Gr#7 (3500-7800Å) and Gr#8
(5200-9250Å), available with HFOSC, were used to obtain the
SN2017iro spectra.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
14 06 23.10 +50 43 20.2 SN 2017iro = SN 2017iro
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
spectra.dat 54 34 Journal of spectroscopic observations of SN 2017iro
(Data behind Figures 6, 8 and 9)
sp/* . 34 The individual spectra in ASCII format
--------------------------------------------------------------------------------
See also:
II/183 : UBVRI Photometric Standards (Landolt 1992)
J/MNRAS/372/1315 : UBVRI photometry of SN 2004et (Sahu+, 2006)
J/A+A/465/71 : 21cm observations of 452 galaxies (Theureau+, 2007)
J/MNRAS/389/955 : u'BVg'r'i'z' light curves of SN 2008ax (Pastorello+, 2008)
J/MNRAS/383/1485 : BVRI light curves of SN 2003jd (Valenti+, 2008)
J/ApJ/692/L84 : Photometry of SN 2008D (Malesani+, 2009)
J/ApJ/702/226 : Swift/UVOT panchromatic obs. of SN 2008D (Modjaz+, 2009)
J/ApJ/742/L18 : Follow-up photometry of the SN IIb PTF 11eon (Arcavi+, 2011)
J/ApJ/741/97 : Light curves of Ibc supernovae (Drout+, 2011)
J/MNRAS/412/1441 : SNe luminosity functions (Li+, 2011)
J/MNRAS/416/3138 : SN 2009jf light curves (Valenti+, 2011)
J/other/Sci/337.444 : RV curves of Galactic massive O stars (Sana+, 2012)
J/MNRAS/436/774 : Core collapse supernovae (type Ibc) (Eldridge+, 2013)
J/MNRAS/431/308 : SN 2011fu BVRI light curves (Kumar+, 2013)
J/ApJS/213/19 : Optical and near-IR light curves of 64 SNe (Bianco+, 2014)
J/AJ/147/99 : Spectrosc. of 73 stripped core-collapse SNe (Modjaz+, 2014)
J/MNRAS/454/95 : SN 2011fu UBVRI griz JHKs LCs (Morales-Garoffolo+, 2015)
J/A+A/574/A60 : Light curve templates of SNe Ib/c from SDSS (Taddia+, 2015)
J/ApJ/825/L22 : BVRI LCs of type Ib supernova iPTF13bvn (Folatelli+, 2016)
J/A+A/593/A68 : PTF12os and iPTF13bvn spectra & LCs (Fremling+, 2016)
J/ApJ/827/90 : Spectroscopy of SNe Ib, IIb and Ic (Liu+, 2016)
J/ApJ/837/120 : Lick Observatory SN Search (LOSS) revisited (Graur+, 2017)
J/MNRAS/482/1545 : Berkeley sample of stripped-envelope SNe (Shivvers+, 2019)
Byte-by-byte Description of file: spectra.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 "Y/M/D" Date Date of observation
12- 17 F6.1 d JD [8089.4/8305.2] Julian Day; JD-2450000
19- 24 F6.1 d Phase [-6.8/209] Phase with reference to the B-band
maximum (JD2458096.2)
26- 32 A7 --- Grisms Grisms observed - Gr7 & Gr8
34- 42 A9 0.1nm Sp1 Gr7 (3500-7800Å)
44- 52 A9 0.1nm Sp2 Gr8 (5200-9250Å)
54 A1 0.1nm Res [7] Resolution (Å)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: sp/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.4 0.1nm lambda [3072.6/9272.1] Wavelength, Angstroms,
redshift-corrected
11- 21 E11.4 cW/m2/nm Flux [-2e-11/9e-10]? Calibrated flux,
in erg/s/cm2/Å
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Nov-2023