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. =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 M_V_=-17.73+/-0.28mag (L=[2.06+/-0.50]x10^42^erg/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 ^56^Ni as M_Ni_=0.075+/-0.025M_{sun}_, and the mass and total energy of the ejecta as M_ej_=1.00+/-0.20M_{sun}_ and E_ej_=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 {tau}~+3days to {tau}~+150 days (parameter t denotes to the time relative to the V-band maximum, {tau} 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: -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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/{AA} units -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Prepared by [AAS], Emmanuelle Perret [CDS] 07-Aug-2019