J/ApJ/863/109 Follow-up optical observations of the SNIc SN2014L (Zhang+, 2018)
Optical observations of the young type Ic supernova SN 2014L in M99.
Zhang J., Wang X., Vinko J., Wheeler J.C., Chang L., Yang Y., Wang L.,
Zhai Q., Rui L., Mo J., Zhang T., Zhang Yu, Wang J., Mao J., Wang C.,
Yi W., Xin Y., Li W., Lun B., Lu K., Sai H., Zheng X., Zhang X., Zhou X.,
Bai J.
<Astrophys. J., 863, 109 (2018)>
=2018ApJ...863..109Z 2018ApJ...863..109Z
ADC_Keywords: Supernovae; Spectra, optical; Photometry, UBVRI
Keywords: supernovae: individual (SN 2014L)
Abstract:
We present optical spectroscopic and photometric observations of the
nearby type Ic supernova (SN Ic) SN 2014L. This SN was discovered by
the Tsinghua-NAOC Transient Survey (TNTS) in the nearby type-Sc spiral
galaxy M99 (NGC 4254). Fitting to the early-time light curve indicates
that SN 2014L was detected at only a few hours after the shock
breakout, and it reached a peak brightness of MV=-17.73±0.28mag
(L=[2.06±0.50]x1042erg/s) approximately 13 days later. SN 2014L
shows a close resemblance to SN 2007gr in the photometric evolution,
while it shows stronger absorption features of intermediate-mass
elements (especially CaII) in the early-time spectra. Based on simple
modeling of the observed light curves, we derived the mass of
synthesized 56Ni as MNi=0.075±0.025M☉, and the mass and
total energy of the ejecta as Mej=1.00±0.20M☉ and
Eej=1.45±0.25 foe, respectively. Given these typical explosion
parameters, the early detection, and the extensive observations, we
suggest that SN 2014L could be a template sample for the investigation
of SNe Ic.
Description:
SN 2014L was discovered by the Tsinghua-NAOC (National astronomical
observatories of China) transient survey (TNTS) on 2014 January 26.83 UT.
This survey uses a 0.6m Schmidt telescope located at Xinglong
Observatory in China.
We triggered the follow-up observation campaign on the Li-Jiang 2.4m
telescope (LJT) with YFOSC (Yunnan Faint Object Spectrograph and
Camera) at Li-Jiang Observatory of Yunnan Observatories (YNAO) and the
Tsinghua-NAOC 0.8m telescope (TNT) at Xing-Long Observatory NAOC.
This campaign spans from t~-10days to t~+140days, or from τ~+3days
to τ~+150 days (parameter t denotes to the time relative to the
V-band maximum, τ denotes to the time compared to the shock
breakout in this paper) covering the full photospheric phase.
Figure 3 shows the spectral sequence of SN 2014L over a period of
about four months starting from 2014 January 27. The observation
journal of these spectra is listed in Table 3, including 13 spectra
from the LJT (+YFOSC) and 1 spectrum from the Xing-Long 2.16m
telescope (XLT) with the BFOSC (Beijing Faint Object Spectrograph and
Camera).
Objects:
-------------------------------------------------
RA (ICRS) DE Designation(s)
-------------------------------------------------
12 18 48.68 +14 24 43.5 SN 2014L = PS1-14kd
-------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 86 74 UBVRI band photometry of SN 2014L
table2.dat 56 7 UBVRI band magnitudes of the local photometric
standards in the field of SN 2014L
table3.dat 73 14 Journal of spectroscopic observations of SN 2014L
sp/* . 14 Individual spectra in ASCII format from Figure 3
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See also:
II/183 : UBVRI Photometric Standards (Landolt 1992)
J/A+A/508/371 : UBVRIJHK observations of SN 2007gr (Hunter+, 2009)
J/ApJ/702/226 : Swift/UVOT panchromatic obs. of SN 2008D (Modjaz+, 2009)
J/AJ/141/163 : Ultimate LC of SN 1998bw/GRB 980425 (Clocchiatti+, 2011)
J/ApJ/741/97 : Light curves of Ibc supernovae (Drout+, 2011)
J/AJ/146/86 : Cosmicflows-2 catalog (Tully+, 2013)
J/ApJS/213/19 : Optical and near-IR light curves of 64 SNe (Bianco+, 2014)
J/AJ/147/99 : Spectroscopy of 73 stripped core-collapse SNe (Modjaz+, 2014)
J/AJ/148/1 : Optical and ultraviolet photometry of SN 2012fr (Zhang+, 2014)
J/ApJS/220/20 : Si and Ca high-velocity features in SNe Ia (Zhao+, 2015)
J/ApJ/821/57 : Photometry of the Type Ib/c SN2013ge (Drout+, 2016)
J/ApJ/827/90 : Spectroscopy of SNe Ib, IIb and Ic (Liu+, 2016)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 "Y/M/D" Date UT date of the observation
13- 20 F8.2 d MJD [56684.7/56836.6] Modified Julian Date of
observation, JD-2400000.5
22- 27 F6.2 d Day [-10.1/142] Fractional days since V band maximum,
MJD=56694.81.
29- 33 F5.2 mag Umag [16.3/19.9]? U band magnitude
35- 38 F4.2 mag e_Umag [0.02/0.2]? Uncertainty in Umag
40- 44 F5.2 mag Bmag [16.1/19.1]? B band magnitude
46- 49 F4.2 mag e_Bmag [0.01/0.3]? Uncertainty in Bmag
51- 55 F5.2 mag Vmag [15/18.9]? V band magnitude
57- 60 F4.2 mag e_Vmag [0.01/0.2]? Uncertainty in Vmag
62- 66 F5.2 mag Rmag [14.5/18.1] R band magnitude
68- 71 F4.2 mag e_Rmag [0.01/0.3] Uncertainty in Rmag
73- 77 F5.2 mag Imag [14.1/17.8] I band magnitude
79- 82 F4.2 mag e_Imag [0.01/0.3] Uncertainty in Imag
84- 86 A3 --- Tel Telescope (1)
--------------------------------------------------------------------------------
Note (1): Telescope used for photometric observations as follows:
LJT = Li-Jiang 2.4m telescope with Yunnan Faint Object Spectrograph and
Camera at the Li-Jiang Observatory of Yunnan Observatories.
TNT = Tsinghu-NAOC 0.8m telescope at Xing-Long Observatory.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 1 I1 --- Star [1/7] Standard star number
3- 7 F5.2 mag Umag [14.3/19.7] U band magnitude
9- 12 F4.2 mag e_Umag [0.02/0.04] Uncertainty in Umag
14- 18 F5.2 mag Bmag [14.1/18.6] B band magnitude
20- 23 F4.2 mag e_Bmag [0.01/0.02] Uncertainty in Bmag
25- 29 F5.2 mag Vmag [13.4/17.5] V band magnitude
31- 34 F4.2 mag e_Vmag [0.01/0.02] Uncertainty in Vmag
36- 40 F5.2 mag Rmag [13/17] R band magnitude
42- 45 F4.2 mag e_Rmag [0.01/0.02] Uncertainty in Rmag
47- 51 F5.2 mag Imag [12.7/16.5] I band magnitude
53- 56 F4.2 mag e_Imag [0.01/0.03] Uncertainty in Imag
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 "Y/M/D" Date UT date of the observation
13- 20 F8.2 d MJD [56684.8/56805.7] Modified Julian Date of
observation, JD-2400000.5
22- 27 F6.2 d Epoch [-10/111] Fractional days since V band maximum,
MJD=56694.81.
29- 32 I4 0.1nm lamMin [3380/3920] Spectral coverage, minimum, Angstroms
34- 37 I4 0.1nm lamMax [8700/9800] Spectral coverage, maximum, Angstroms
39- 40 I2 0.1nm dlam [16/50] Spectral resolution, per pixel, Angstroms
42- 45 I4 s Exp [1500/3000] Total spectral exposure time
47- 50 F4.2 --- Airmass [1/1.4] Airmass
52- 60 A9 --- Tel Telescope + Instrument (1)
62- 73 A12 --- File Name of the file in subdirectory sp;
column added by CDS
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Note (1): Telescope used for photometric observations as follows:
LJT+YFOSC = Li-Jiang 2.4m telescope with Yunnan Faint Object
Spectrograph and Camera at the Li-Jiang Observatory of Yunnan
Observatories.
XLT+BFOSC = Xing-Long 2.16m telescope with the Beijing Faint Object
Spectrograph and Camera at Xing-Long Observatory.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: sp/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.6 0.1nm lambda [3380/9808] Observed frame wavelength,
in Angstrom units
13- 25 E13.6 cW/m2/nm Flux [-2.6e-16/7.2e-15] Calibrated flux,
in erg/cm2/s/Å units
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 07-Aug-2019