J/ApJ/883/147 UV-NIR LCs of the energetic H-stripped SN2016coi (Terreran+, 2019)
SN 2016coi (ASASSN-16fp): an energetic H-stripped core-collapse supernova from
a massive stellar progenitor with large mass loss.
Terreran G., Margutti R., Bersier D., Brimacombe J., Caprioli D.,
Challis P., Chornock R., Coppejans D.L., Dong S., Guidorzi C., Hurley K.,
Kirshner R., Migliori G., Milisavljevic D., Palmer D.M., Prieto J.L.,
Tomasella L., Marchant P., Pastorello A., Shappee B.J., Stanek K.Z.,
Stritzinger M.D., Benetti S., Chen P., DeMarchi L., Elias-Rosa N., Gall C.,
Harmanen J., Mattila S.
<Astrophys. J., 883, 147 (2019)>
=2019ApJ...883..147T 2019ApJ...883..147T
ADC_Keywords: Supernovae; Photometry, ultraviolet; Photometry, ugriz;
Spectra, optical; Radio sources; X-ray sources
Keywords: supernovae: individual (SN 2016coi, ASASSN-16fp)
Abstract:
We present comprehensive observations and analysis of the energetic
H-stripped SN 2016coi (a.k.a. ASASSN-16fp), spanning the γ-ray
through optical and radio wavelengths, acquired within the first hours
to ∼420 days post explosion. Our observational campaign confirms the
identification of He in the supernova (SN) ejecta, which we interpret
to be caused by a larger mixing of Ni into the outer ejecta layers. By
modeling the broad bolometric light curve, we derive a large
ejecta-mass-to-kinetic-energy ratio (Mej∼4-7M☉,
Ek~(7-8)x1051erg). The small [CaII]λλ7291,7324 to
[OI]λλ6300,6364 ratio (∼0.2) observed in our late-time
optical spectra is suggestive of a large progenitor core mass at the
time of collapse. We find that SN 2016coi is a luminous source of
X-rays (LX>1039erg/s in the first ∼100 days post explosion) and
radio emission (L8.5GHz∼7x1027erg/s/Hz at peak). These values are
in line with those of relativistic SNe (2009bb, 2012ap). However, for
SN 2016coi, we infer substantial pre-explosion progenitor mass loss
with a rate dM/dt~(1-2)x10-4M☉/yr and a sub-relativistic shock
velocity vsh∼0.15c, which is in stark contrast with relativistic SNe
and similar to normal SNe. Finally, we find no evidence for a SN-
associated shock breakout γ-ray pulse with energy
Eγ>2x1046erg. While we cannot exclude the presence of a
companion in a binary system, taken together, our findings are
consistent with a massive single-star progenitor that experienced
large mass loss in the years leading up to core collapse, but was
unable to achieve complete stripping of its outer layers before
explosion.
Description:
SN 2016coi was discovered on 2016 May 27.55 UT (MJD57535.55;
Holoien+ 2016ATel.9086....1H 2016ATel.9086....1H) by the All Sky Automated Survey for
SuperNovae (ASAS-SN; Shappee+ 2014, J/ApJ/788/48) in the irregular
galaxy UGC 11868.
Our photometric data have been obtained from several different
telescopes and instruments, see Table 3.
Our UV-to-NIR campaign densely samples the evolution of SN 2016coi in
its first ∼400 days post explosion, with more than 1100 observations
distributed over 166 nights (the gap around 200-300 days corresponds
to when SN 2016coi was behind to the Sun). See Section 2.
We obtained optical spectroscopy of SN 2016coi from a few days until
t>400days post explosion with a variety of instruments on different
telescopes. The spectroscopic log can be found in Table 9.
See Section 3.
We present in Figure 8 multiband observations of SN 2016coi taken up
to 278 days post explosion with the Karl G. Jansky Very Large Array
(VLA; projects 16A-447 and 17A-167). The details of these data are
given in Table 10. See Section 4.
The X-Ray Telescope (XRT), on board the Neil Gehrels Swift
Observatory, started observing SN 2016coi on 2016 May 27
(δt∼2days post explosion) until 2017 April 17
(δt∼326days), for a total exposure time of 94.4ks. See Section 5.
Objects:
--------------------------------------------------------------------
RA (ICRS) DE Designation(s) (Dist)
--------------------------------------------------------------------
21 59 04.14 +18 11 10.5 SN 2016coi = ASASSN -16fp (D=18.1Mpc)
--------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 69 147 ugriz photometry
table4.dat 75 248 UBVRI photometry
table5.dat 47 75 JHK photometry
table6.dat 52 30 UV photometry
table9.dat 117 64 Spectroscopic log
sp/* . 64 Individual spectrum in FITS format
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See also:
II/227 : The Asiago Supernova Catalogue 1999 (Barbon+, 1999)
VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/A+A/414/23 : CCD Hα and R photometry of 334 galaxies (James+, 2004)
J/MNRAS/383/1485 : BVRI light curves of SN 2003jd (Valenti+, 2008)
J/AJ/137/4517 : UVOT light curves of supernovae (Brown+, 2009)
J/other/Nat/463.513 : Radio observations of SN 2009bb (Soderberg+, 2010)
J/ApJ/741/97 : Light curves of Ibc supernovae (Drout+, 2011)
J/ApJ/728/14 : Photometry of SN 2009bb (Pignata+, 2011)
J/MNRAS/416/3138 : SN 2009jf light curves (Valenti+, 2011)
J/ApJ/760/L33 : Photometry of the Ic supernova PTF12gzk (Ben-Ami+, 2012)
J/ApJ/746/156 : Radio afterglow observations of GRBs (Chandra+, 2012)
J/MNRAS/425/1789 : Berkeley supernova Ia program. I. (Silverman+, 2012)
J/MNRAS/436/774 : Core collapse supernovae (type Ibc) (Eldridge+, 2013)
J/MNRAS/428/729 : GRB Swift X-ray light curves analysis (Margutti+, 2013)
J/ApJ/785/37 : Type Ic SN 2010mb optical photometry (Ben-Ami+, 2014)
J/ApJS/213/19 : Optical and near-IR light curves of 64 SNe (Bianco+, 2014)
J/ApJ/782/42 : Panchromatic observations of PTF11qcj (Corsi+, 2014)
J/AJ/147/99 : Spectroscopy of stripped core-collapse SNe (Modjaz+, 2014)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/A+A/580/A142 : SN 2011dh. The first two years (Ergon+, 2015)
J/A+A/579/A40 : PESSTO catalog (Smartt+, 2015)
J/ApJ/821/57 : Photometry of the Type Ib/c SN2013ge (Drout+, 2016)
J/ApJ/832/108 : Spectral properties of Type Ic & Ic-bl SNe (Modjaz+, 2016)
http://wiserep.weizmann.ac.il/ : Weizmann Interactive Supernova Data Repository
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.2 d MJD [57536.14/57906.38] Modified Julian Date
10- 14 F5.2 mag umag [15.61/20.89]? Apparent u band magnitude
16- 19 F4.2 mag e_umag [0.03/0.36]? Uncertainty in umag
21- 25 F5.2 mag gmag [14.15/21.38]? Apparent g band magnitude
27- 30 F4.2 mag e_gmag [0.01/0.61]? Uncertainty in gmag
32- 36 F5.2 mag rmag [13.54/19.57]? Apparent r band magnitude
38- 41 F4.2 mag e_rmag [0.02/0.51]? Uncertainty in rmag
43- 47 F5.2 mag imag [13.89/19.98]? Apparent i band magnitude
49- 52 F4.2 mag e_imag [0.02/0.53]? Uncertainty in imag
54- 58 F5.2 mag zmag [13.48/17.27]? Apparent z band magnitude
60- 63 F4.2 mag e_zmag [0.02/0.15]? Uncertainty in zmag
65- 69 A5 --- Tel Telescope/Instrument used code (G1)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.2 d MJD [57527.53/57893.59] Modified Julian Date
10 A1 --- l_Umag Limit flag on Umag
12- 16 F5.2 mag Umag [14.68/19.69]? Apparent U band magnitude
18- 21 F4.2 mag e_Umag [0.05/0.5]? Uncertainty in Umag
23 A1 --- l_Bmag Limit flag on Bmag
25- 29 F5.2 mag Bmag [14.82/19.89]? Apparent B band magnitude
31- 34 F4.2 mag e_Bmag [0.03/0.85]? Uncertainty in Bmag
36 A1 --- l_Vmag Limit flag on Vmag
38- 42 F5.2 mag Vmag [13.61/18.99]? Apparent V band magnitude
44- 47 F4.2 mag e_Vmag [0.01/0.77]? Uncertainty in Vmag
49- 53 F5.2 mag Rmag [13.46/15.94]? Apparent R band magnitude
55- 58 F4.2 mag e_Rmag [0.04/0.25]? Uncertainty in Rmag
60- 64 F5.2 mag Imag [13.6/15.65]? Apparent I band magnitude
66- 69 F4.2 mag e_Imag [0.06/0.19]? Uncertainty in Imag
71- 75 A5 --- Inst Instrument used code (G1)
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.2 d MJD [57540.17/57866.22] Modified Julian Date
10- 14 F5.2 mag Jmag [13.01/15.47]? Apparent J band magnitude
16- 19 F4.2 mag e_Jmag [0.01/0.4]? Uncertainty in Jmag
21 A1 --- l_Hmag Limit flag on Hmag
23- 27 F5.2 mag Hmag [12.82/18.61]? Apparent H band magnitude
29- 32 F4.2 mag e_Hmag [0.02/0.35]? Uncertainty in Hmag
34- 38 F5.2 mag Kmag [12.69/14.7]? Apparent K band magnitude
40- 43 F4.2 mag e_Kmag [0.02/0.39]? Uncertainty in Kmag
45- 47 A3 --- Inst Instrument used code (G1)
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.2 d MJD [57535.77/57860.49] Modified Julian Date
10 A1 --- l_UVW2 Limit flag on W2mag
12- 16 F5.2 mag UVW2 [17/20.3]? Swift/UVOT apparent UVW2 band magnitude
18- 21 F4.2 mag e_UVW2 [0.16/0.7]? Uncertainty in UVW2
23 A1 --- l_UVM2 Limit flag on M2mag
25- 29 F5.2 mag UVM2 [17/20.1]? Swift/UVOT apparent UVM2 band magnitude
31- 34 F4.2 mag e_UVM2 [0.14/0.8]? Uncertainty in UVM2
36 A1 --- l_UVW1 Limit flag on UVW1
38- 42 F5.2 mag UVW1 [15.8/19.8]? Swift/UVOT apparent UVW1 band magnitude
44- 47 F4.2 mag e_UVW1 [0.1/0.8]? Uncertainty in UVW1
49- 52 A4 --- Inst Instrument used code (G1)
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Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 "Y:M:D" Date Date of observation (UT)
13- 19 F7.1 d MJD [57536.2/57954.2] Modified Julian Date
21- 28 A8 --- Tel Telescope (1)
30- 41 A12 --- Inst Instrument
43- 46 F4.2 arcsec Slit [0.6/3.93] Slit
48- 56 A9 --- Grating Grism/Grating
58-117 A60 --- FileName Name of the FITS file in subdirectory sp/
-- Column added by CDS
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Note (1): Telescope as follows:
1.22 = 1.22m Galileo with B&C spectrograph
1.82 = Copernico 1.82m Telescope (Asiago) operated by INAF Osservatorio
Astronomico di Padova with AFOSC (R∼375)
du Pont = du Pont Telescope with B&C spectrograph (R∼1667 in blue and
R∼2300 in red)
LBT = Large Binocular Telescope with MODS (R∼1850)
Magellan = Las Campanas Magellan I 6.5-m Baade Telescope with IMACS
MDM = MDM Hiltner 2.4m telescope with OSMOS (R∼1500)
MMT = Multiple Mirror Telescope (R∼750)
LT = Liverpool Telescope with SPRAT (R∼350)
NOT = Nordic Optical Telescope with ALFOSC (R∼360)
Till = Tillinghast 1.5m (FLWO) with FAST
TNG = The 3.58m Telescopio Nazionale Galileo (TNG) with DOLORES (R∼714)
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Global notes:
Note (G1): Instrument as follows:
ASA = 14cm Brutus operated by the ASAS-SN team;
RK = 25cm Meade SCT operated by R. A. Koff at Antelope Hills
Observatory, Bennett, CO, USA;
JB = 43cm PlaneWave CDK operated by Joseph Brimacombe at
New Mexico Skies, New Mexico, USA;
GS = 43cm PlaneWave CDK operated by Geoffrey Stone at Sierra Remote
Observatories, Auberry, CA, USA;
T50 = T50 operated by Joseph Brimacombe at New Mexico Skies,
New Mexico, USA;
Gem = GEM operated by the University of Iowa at Iowa Robotic Observatory;
DEM = 51cm PlaneWave CDK operated by DEMONEXT
(Villanueva+ 2018PASP..130a5001V 2018PASP..130a5001V);
WHO = WHO 1m telescope operated by the Weihai Observatory of
Shandong University, China.
LCOGT = Las Cumbres Observatory (LCOGT) with Sinistro;
1.82 = Copernico 1.82m Telescope (Asiago) operated by
INAF Osservatorio Astronomico di Padova with AFOSC or REM-IR
instruments;
REM = Rapid Eye Mount with ROSS2 or IO:0;
LT = Liverpool Telescope with IO:I or NOTCam;
NOT = Nordic Optical Telescope with ALFOSC;
MMT = Multiple Mirror Telescope with MMTCam;
UVOT = Swift/Ultraviolet Optical Telescope;
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History:
From electronic version of the journal for Tables 3-6 and 9
Spectra downloaded on WISeRep (http://wiserep.weizmann.ac.il/)
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 08-Mar-2021