J/ApJ/819/35 Light curves of four transients from PTF & SNLS (Arcavi+, 2016)
Rapidly rising transients in the supernova-superluminous supernova gap.
Arcavi I., Wolf W.M., Howell D.A., Bildsten L., Leloudas G., Hardin D.,
Prajs S., Perley D.A., Svirski G., Gal-Yam A., Katz B., McCully C.,
Cenko S.B., Lidman C., Sullivan M., Valenti S., Astier P., Balland C.,
Carlberg R.G., Conley A., Fouchez D., Guy J., Pain R.,
Palanque-Delabrouille N., Perrett K., Pritchet C.J., Regnault N., Rich J.,
Ruhlmann-Kleider V.
<Astrophys. J., 819, 35 (2016)>
=2016ApJ...819...35A 2016ApJ...819...35A (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, ugriz
Keywords: supernovae: individual: (PTF10iam, SNLS04D4ec, SNLS05D2bk,
SNLS06D1hc, Dougie)
Abstract:
We present observations of four rapidly rising (trise∼10days)
transients with peak luminosities between those of supernovae (SNe)
and superluminous SNe (Mpeak~-20) --one discovered and followed by
the Palomar Transient Factory (PTF) and three by the Supernova Legacy
Survey (SNLS). The light curves resemble those of SN 2011kl, recently
shown to be associated with an ultra-long-duration gamma-ray burst
(GRB), though no GRB was seen to accompany our SNe. The rapid rise to
a luminous peak places these events in a unique part of SN phase
space, challenging standard SN emission mechanisms. Spectra of the PTF
event formally classify it as an SN II due to broad Hα emission,
but an unusual absorption feature, which can be interpreted as either
high velocity Hα (though deeper than in previously known cases)
or SiII (as seen in SNe Ia), is also observed. We find that existing
models of white dwarf detonations, CSM interaction, shock breakout in
a wind (or steeper CSM), and magnetar spin down cannot readily explain
the observations. We consider the possibility that a "Type 1.5 SN"
scenario could be the origin of our events.
Description:
PTF10iam was discovered by the Palomar 48 inch Oschin Schmidt
telescope (P48) as part of the PTF survey. The three Supernova Legacy
Survey (SNLS; Astier et al. 2006A&A...447...31A 2006A&A...447...31A) events (SNLS04D4ec,
SNLS05D2bk and SNLS06D1hc) were discovered by the deep survey of the
Canada-France-Hawaii Telescope Legacy Survey (CFHTLS 2002), using the
CFHT 3.6m telescope.
The SNLS host-galaxy magnitudes were obtained from the SNLS five-year
imaging data set (D. Hardin et al. 2016, in preparation), following
the general method described in Kronborg et al. (2010A&A...514A..44K 2010A&A...514A..44K).
In short, photometry was performed on deep image stacks in the ugriz
CFHT/Megacam filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 63 4 Discovery details of events
table2.dat 52 161 Photometric observations
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See also:
J/A+A/574/A60 : Light curve templates of SNe Ib/c from SDSS (Taddia+, 2015)
J/A+A/568/A22 : Joint analysis of the SDSS-II and SNLS SNe Ia (Betoule+, 2014)
J/ApJS/192/1 : Light-curve parameters from the SNLS (Conley+, 2011)
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/A+A/506/999 : Photometric Calibration of SNLS (Regnault+, 2009)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ID Object identifier (G1)
12- 13 I2 h RAh Hour of right ascension (J2000)
15- 16 I2 min RAm Minute of right ascension (J2000)
18- 22 F5.2 s RAs Second of right ascension (J2000)
24 A1 --- DE- Sign of declination (J2000)
25- 26 I2 deg DEd Degree of declination (J2000)
28- 29 I2 arcmin DEm Arcminute of declination (J2000)
31- 34 F4.1 arcsec DEs Arcsecond of declination (J2000)
36- 40 F5.3 --- z [0.1/0.7] Redshift
42- 52 A11 "Y/M/D" Date UT date of the discovery
54- 58 F5.2 mag mag [19.1/23.4] Discovery magnitude
60- 63 F4.2 mag e_mag [0.04/0.2] 1σ uncertainty on mag
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ID Object identifier (G1)
12- 15 A4 --- Tel Telescope identifier (1)
17 A1 --- Filt Filter used in the observation (griz or R)
19- 32 F14.6 d HJD Heliocentric Julian Date of observation
34 A1 --- l_mag Upper limit flag on mag (2)
35- 43 F9.6 mag mag [18.4/26.7] Observed magnitude in Filter (3)
45- 52 F8.6 mag e_mag [0.01/0.4]? Error in mag
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Note (1): Telescope as follows:
P48 = Palomar 48-inch Oschin Schmidt telescope;
P60 = Palomar 60-inch telescope;
CFHT = Canada France Hawaii Telescope 3.6-meter telescope.
Note (2): These mark 3σ non-detections.
Note (3): The photometry for PTF10iam is presented in the AB system and
for the SNLS events in the Vega system.
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Global note:
Note (G1): The PTF10iam data were presented also in
Arcavi et al. (2014ApJ...793...38A 2014ApJ...793...38A), but are given here again for
completeness with the addition of a new pre-explosion upper limit.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 13-May-2016