J/MNRAS/449/1921 UV/optical/NIR photometry for Type Ibn SNe (Pastorello+, 2015)
Massive stars exploding in a He-rich circumstellar medium -
IV. Transitional Type Ibn supernovae.
Pastorello A., Benetti S., Brown P.J., Tsvetkov D.Y., Inserra C.,
Taubenberger S., Tomasella L., Fraser M., Rich D.J., Botticella M.T.,
Bufano F., Cappellaro E., Ergon M., Gorbovskoy E.S., Harutyunyan A.,
Huang F., Kotak R., Lipunov V.M., Magill L., Miluzio M., Morrell N.,
Ochner P., Smartt S.J., Sollerman J., Spiro S., Stritzinger M.D.,
Turatto M., Valenti S., Wang X., Wright D.E., Yurkov V.V., Zampieri L.,
Zhang T.
<Mon. Not. R. Astron. Soc., 449, 1921-1940 (2015)>
=2015MNRAS.449.1921P 2015MNRAS.449.1921P (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, UBVRI ; Photometry, infrared ;
Photometry, ultraviolet
Keywords: supernovae: general - supernovae: individual: SN 2010al -
supernovae: individual: SN 2011hw -
supernovae: individual: SN 2006jc -
supernovae: individual: SN 2005la -
supernovae: individual: SN 2000er
Abstract:
We present ultraviolet, optical and near-infrared data of the Type Ibn
supernovae (SNe) 2010al and 2011hw. SN 2010al reaches an absolute
magnitude at peak of MR=-18.86±0.21. Its early light curve shows
similarities with normal SNe Ib, with a rise to maximum slower than
most SNe Ibn. The spectra are dominated by a blue continuum at early
stages, with narrow P-Cygni HeI lines indicating the presence of a
slow-moving, He-rich circumstellar medium. At later epochs, the
spectra well match those of the prototypical SN Ibn 2006jc, although
the broader lines suggest that a significant amount of He was still
present in the stellar envelope at the time of the explosion. SN 2011hw
is somewhat different. It was discovered after the first maximum, but
the light curve shows a double peak. The absolute magnitude at
discovery is similar to that of the second peak (MR=-18.59±0.25),
and slightly fainter than the average of SNe Ibn. Though the spectra
of SN 2011hw are similar to those of SN 2006jc, coronal lines and
narrow Balmer lines are clearly detected. This indicates substantial
interaction of the SN ejecta with He-rich, but not H-free, circumstellar
material. The spectra of SN 2011hw suggest that it is a transitional
SN Ibn/IIn event similar to SN 2005la. While for SN 2010al the
spectrophotometric evolution favours a H-deprived Wolf-Rayet
progenitor (of WN-type), we agree with the conclusion of Smith et al.
that the precursor of SN 2011hw was likely in transition from a
luminous blue variable to an early Wolf-Rayet (Ofpe/WN9) stage.
Description:
We started our optical and near-infrared (NIR) observational campaigns
soon after the classification announcements of the two SNe, using the
instruments available to our collaboration (see Tables A3 and A4).
Additional photometry with small-size telescopes was kindly provided
by amateur astronomers. Both SNe 2010al and 2011hw were visible for
only 60-70 d after their discoveries, then they disappeared behind
the Sun. We tried to recover SN 2010al at very late phases, but it was
only visible in NIR observations obtained with the 8.4-m Large
Binocular Telescope (Mt. Graham, Arizona; USA) equipped with Lucifer.
Additional space observations of SNe 2010al and 2011hw in the
ultra-violet (UV) and optical bands were obtained with the Swift
satellite and its Ultraviolet/Optical Telescope (UVOT). These data
were useful to constrain the large energy contribution of the UV
domain in the early phases of the evolution of the two SNe.
Objects:
---------------------------------------------------------------
RA (ICRS) DE Designation(s)
---------------------------------------------------------------
08 14 15.91 +18 26 18.2 SN 2010al = SN 2010al
22 26 14.54 +34 12 59.1 SN 2011hw = PSN J22261454+3412591
---------------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea3.dat 119 54 Calibrated multiband photometry of SN 2010al
tablea4.dat 119 33 Calibrated multiband photometry of SN 2011hw
tablea5.dat 93 25 Swift/UVOT band photometry of SNe 2010al
and SN 2011hw
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See also:
II/339 : Swift/UVOT Serendipitous Source Catalog (Yershov, 2015)
J/AJ/137/4517 : UVOT light curves of supernovae (Brown+, 2009)
Byte-by-byte Description of file: tablea3.dat tablea4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 "date" Date Observation date
12 A1 --- n_Date [*D] Note on Date (1)
14- 20 F7.2 d JD Julian Date (JD-2455000)
22 A1 --- l_Umag [>] Limit flag on Umag
23- 27 F5.2 mag Umag ? U-band magnitude
29- 32 F4.2 mag e_Umag ? Uncertainty in Umag (2)
34 A1 --- l_Bmag [>] Limit flag on Bmag
35- 39 F5.2 mag Bmag ? B-band magnitude
41- 44 F4.2 mag e_Bmag ? Uncertainty in Bmag (2)
46 A1 --- l_Vmag [>] Limit flag on Vmag
47- 51 F5.2 mag Vmag ? V-band magnitude (3)
53- 56 F4.2 mag e_Vmag ? Uncertainty in Vmag (2) (3)
58 A1 --- l_Rmag [>] Limit flag on Rmag
59- 63 F5.2 mag Rmag ? R-band magnitude (3)
65- 68 F4.2 mag e_Rmag ? Uncertainty in Rmag (2) (3)
70 A1 --- l_Imag [>] Limit flag on Imag
71- 75 F5.2 mag Imag ? I-band magnitude
77- 80 F4.2 mag e_Imag ? Uncertainty in Imag (2)
82 A1 --- l_Jmag [>] Limit flag on Jmag
83- 87 F5.2 mag Jmag ? J-band magnitude
89- 92 F4.2 mag e_Jmag ? Uncertainty in Jmag (2)
94 A1 --- l_Hmag [>] Limit flag on Hmag
95- 99 F5.2 mag Hmag ? H-band magnitude
101-104 F4.2 mag e_Hmag ? Uncertainty in Hmag (2)
106 A1 --- l_Kmag [>] Limit flag on Kmag
107-111 F5.2 mag Kmag ? K-band magnitude
113-116 F4.2 mag e_Kmag ? Uncertainty in Kmag (2)
118-119 I2 --- Inst [1/19] Instrument identification (4)
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Note (1): Note as follows:
* = Marks unfiltered data rescaled to the R-band magnitudes. These have been
obtained by computing zero-points using the R-band magnitudes of the
stellar sequence in the SN field, and assuming negligible colour
correction;
D = Indicates luminance filter measurements reported to V-band magnitudes.
Note (2): The errors are obtained by combining in quadrature the errors in
the photometric calibration and instrumental PSF measurement errors.
Note (3): Standard Johnson-Cousins V- and R-band magnitudes from amateur
astronomers have been obtained by computing instrumental zero-points
using the V and R magnitudes of the local sequence stars reported in
Table A1, and adopting no colour correction.
Note (4): The numbers identify the instrumental configurations.
Source as follows:
1 = Meade 16" Reflector + SBIG ST-9XE Dual CCD camera (Rich Observatory,
Hampden, Maine, USA; obs. D.R.);
2 = 0.4-m MASTER telescope + Apogee Alta U16M CCD (Kislovodsk, Caucasian
region Russia);
3 = 0.36-m Schmidt-Cassegrain + Apogee ALTA U47 CCD camera (New Millennium
Observatory, Mozzate, Italy; obs. E. Cozzi);
4 = 12.5-inch RCOS Telescope + SBIG STL6303 CCD camera (Macedon Ranges
Observatory, Melbourne, Australia; obs. J. Brimacombe);
5 = 0.4-m MASTER Telescope + Apogee Alta U16M CCD (Blagoveschensk; Far East
region, Russia);
6 = 0.80-m Tsinghua-NAOC Telescope + Princeton Instruments VersArray:1300B
CCD (Xinglong Observatory, Yanshan mountains, Hebei, China);
7 = 2.0-m Liverpool Telescope + SupIRCam (La Palma, Canary Islands, Spain);
8 = 8.2-m Very Large Ttelescope (UT2) + XShooter (spectrophotometry; European
Southern Observatory; Cerro Paranal, Chile);
9 = 280-mm Celestron 11 + Atik 16HR with Sony chip ICX285AL (Posadas
Observatory; Cordoba, Spain; obs. R. Benavides);
10 = 1.82-m Copernico Telescope + AFOSC (Mt. Ekar, Asiago, Italy);
11 = 3.58-m New Technology Telescope + EFOSC2 (European Southern Observatory;
La Silla, Chile);
12 = 3.58-m New Technology Telescope + SOFI (European Southern Observatory;
La Silla, Chile);
13 = 3.58-m Telescopio Nazionale Galileo + Dolores (La Palma, Canary Islands,
Spain);
14 = 2.2-m Calar Alto Telescope + CAFOS (Calar Alto Observatory, Almeria,
Spain);
15 = 2 OE 8.4-m Large Binocular Telescope + Lucifer (Mt. Graham International
Observatory, Arizona, USA);
16 = 67/92-cm Schmidt Telescope + SCAM (Mt. Ekar, Asiago, Italy);
17 = 2.0-m Faulkes Telescope North + EM03 (Haleakala, Hawaii Isl., USA);
18 = 2.0-m Liverpool Telescope + RATCam (La Palma, Canary Isl., Spain);
19 = 4.2-m William Herschel Telescope + ACAM (La Palma, Canary Isl., Spain).
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Byte-by-byte Description of file: tablea5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- SN [AB] SN designation (1)
3- 13 A11 "date" Date Observation date
15- 21 F7.2 d JD Julian Date (JD-2455000)
23 A1 --- l_uvw2 [>] Limit flag on uvw2
24- 28 F5.2 mag uvw2 Swift/UVOT uvw2 magnitude
30- 33 F4.2 mag e_uvw2 ? Uncertainty in uvw2
35 A1 --- l_uvm2 [>] Limit flag on uvm2
36- 40 F5.2 mag uvm2 Swift/UVOT uvm2 magnitude
42- 45 F4.2 mag e_uvm2 ? Uncertainty in uvm2
47 A1 --- l_uvw1 [>] Limit flag on uvw1
48- 52 F5.2 mag uvw1 Swift/UVOT uvw1 magnitude
54- 57 F4.2 mag e_uvw1 ? Uncertainty in uvw1
59 A1 --- l_umag [>] Limit flag on umag
60- 64 F5.2 mag umag ? Swift/UVOT u-band magnitude (2)
66- 69 F4.2 mag e_umag ? Uncertainty in umag (2)
71 A1 --- l_bmag [>] Limit flag on bmag
72- 76 F5.2 mag bmag ? Swift/UVOT b-band magnitude (2)
78- 81 F4.2 mag e_bmag ? Uncertainty in bmag (2)
83 A1 --- l_vmag [>] Limit flag on vmag
84- 88 F5.2 mag vmag ? Swift/UVOT v-band magnitude (2)
90- 93 F4.2 mag e_vmag ? Uncertainty in vmag (2)
--------------------------------------------------------------------------------
Note (1): SN as follows:
A = SN 2010al;
B = SN 2011hw.
Note (2): Original u, b, v UVOT magnitudes have been converted to those in
the Johnson-Cousins photometric system using the magnitudes of the
stellar sequences reported in Table A1.
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History:
From electronic version of the journal
References:
Pastorello et al. Paper I. 2008MNRAS.389..113P 2008MNRAS.389..113P
Pastorello et al. Paper II. 2008MNRAS.389..131P 2008MNRAS.389..131P
Mattila et al. Paper III. 2008MNRAS.389..141M 2008MNRAS.389..141M
Pastorello et al. Paper V. 2015MNRAS.449.1941P 2015MNRAS.449.1941P, Cat. J/MNRAS/449/1941
Pastorello et al. Paper VI. 2015MNRAS.449.1954P 2015MNRAS.449.1954P
Pastorello et al. Paper VII. 2015MNRAS.453.3649P 2015MNRAS.453.3649P
Pastorello et al. Paper VIII. 2015MNRAS.454.4293P 2015MNRAS.454.4293P
Pastorello et al. Paper IX. 2016MNRAS.456..853P 2016MNRAS.456..853P
(End) Tiphaine Pouvreau [CDS] 04-Dec-2017