J/MNRAS/453/3649 Photometric data for ASASSN-15ed (Pastorello+, 2015)
Massive stars exploding in a He-rich circumstellar medium -
VII. The metamorphosis of ASASSN-15ed from a narrow line Type Ibn to a normal
Type Ib supernova.
Pastorello A., Prieto J.L., Elias-Rosa N., Bersier D., Hosseinzadeh G.,
Morales-Garoffolo A., Noebauer U.M., Taubenberger S., Tomasella L.,
Kochanek C.S., Falco E., Basu U., Beacom J.F., Benetti S., Brimacombe J.,
Cappellaro E., Danilet A.B., Dong S., Fernandez J.M., Goss N., Granata V.,
Harutyunyan A., Holoien T.W.-S., Ishida E.E.O., Kiyota S., Krannich G.,
Nicholls B., Ochner P., Pojmanski G., Shappee B.J., Simonian G.V.,
Stanek K.Z., Starrfield S., Szczygiel D., Tartaglia L., Terreran G.,
Thompson T.A., Turatto M., Wagner R.M., Wiethoff W.S., Wilber A.,
Wozniak P.R.
<Mon. Not. R. Astron. Soc., 453, 3649-3661 (2015)>
=2015MNRAS.453.3649P 2015MNRAS.453.3649P (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, UBV ; Photometry, SDSS
Keywords: supernovae: general - supernovae: individual: ASASSN-15ed -
supernovae: individual: SN 1991D - supernovae: individual: SN 2006jc -
supernovae: individual: SN 2010al
Abstract:
We present the results of the spectroscopic and photometric monitoring
campaign of ASASSN-15ed. The transient was discovered quite young by
the All Sky Automated Survey for SuperNovae (ASAS-SN) survey. Amateur
astronomers allowed us to sample the photometric SN evolution around
maximum light, which we estimate to have occurred on JD=2457087.4±0.6
in the r band. Its apparent r-band magnitude at maximum was r=16.91±0.10,
providing an absolute magnitude Mr~-20.04±0.20, which is slightly more
luminous than the typical magnitudes estimated for Type Ibn SNe. The
post-peak evolution was well monitored, and the decline rate (being in
most bands around 0.1 mag/d during the first 25 d after maximum) is
marginally slower than the average decline rates of SNe Ibn during the
same time interval. The object was initially classified as a Type Ibn SN
because early-time spectra were characterized by a blue continuum with
superimposed narrow P-Cygni lines of HeI, suggesting the presence of a
slowly moving (1200-1500 km/s), He-rich circumstellar medium. Later on,
broad P-Cygni HeI lines became prominent. The inferred velocities, as
measured from the minimum of the broad absorption components, were between
6000 and 7000 km/s. As we attribute these broad features to the SN ejecta,
this is the first time we have observed the transition of a Type Ibn SN
to a Type Ib SN.
Description:
Our multifilter follow-up campaign started on 2015 March 12, when the
object was already past-maximum, and lasted over two months. It was
performed using several telescopes available to the collaboration,
including the 1.82-m Copernico Telescope at Mt Ekar (Asiago, Italy),
equipped with AFOSC, the LCOGT 1.0-m telescope at McDonald Observatory
(Texas, USA) equipped with an SBIG camera, the 10.4-m Gran Telescopio
Canarias (GTC) equipped with OSIRIS, the 3.58-m Telescopio Nazionale
Galileo (TNG) equipped with DOLORES (LRS), the 2.5-m Nordic Optical
Telescope (NOT) with ALFOSC and the 2.0-m Liverpool Telescope (LT) with
the IO:O camera, all sited at La Palma (Canary Islands, Spain).
Objects:
--------------------------------------------------------
RA (ICRS) DE Designation(s)
--------------------------------------------------------
16 48 25.16 +50 59 30.7 ASASSN-15ed = ASASSN -15ed
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 113 46 Photometric data for ASASSN-15ed
tablea1.dat 20 42 Pseudo-bolometric data for ASASSN-15ed
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See also:
J/MNRAS/449/1921 : UV/optical/NIR photometry for Type Ibn SNe
(Pastorello+, 2015)
J/MNRAS/449/1941 : Optical/NIR photometry of OGLE-2012-SN-006
(Pastorello+, 2015)
J/MNRAS/467/1098 : ASAS-SN bright supernova catalogue 2015 (Holoien+, 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 "date" Date Date of observation
12- 21 F10.2 d JD Julian Date
23- 27 F5.2 mag Bmag [18.08/22.36]? Johnson B band magnitude
29- 32 F4.2 mag e_Bmag [0.04/0.68]? Uncertainty in Bmag (1)
34 A1 --- l_Vmag [>] Limit flag on Vmag
35- 39 F5.2 mag Vmag [17.11/22.36]? Johnson V band magnitude
41- 44 F4.2 mag e_Vmag [0.04/0.54]? Uncertainty in Vmag (1)
46 A1 --- l_umag [>] Limit flag on umag
47- 51 F5.2 mag umag [18.33/21.56]? Sloan u band magnitude
53- 56 F4.2 mag e_umag [0.03/0.48]? Uncertainty in umag (1)
58 A1 --- l_gmag [>] Limit flag on gmag
59- 63 F5.2 mag gmag [17.58/23.62]? Sloan g band magnitude
65- 68 F4.2 mag e_gmag [0.04/0.46]? Uncertainty in gmag (1)
70 A1 --- l_rmag [>] Limit flag on rmag
71- 75 F5.2 mag rmag [16.92/23.52]? Sloan r band magnitude
77- 80 F4.2 mag e_rmag [0.03/0.36]? Uncertainty in rmag (1)
82 A1 --- l_imag [>] Limit flag on imag
83- 87 F5.2 mag imag [17.58/23.08]? Sloan i band magnitude
89- 92 F4.2 mag e_imag [0.03/0.28]? Uncertainty in imag (1)
94 A1 --- l_zmag [>] Limit flag on zmag
95- 99 F5.2 mag zmag [17.69/22.4]? Sloan z band magnitude
101-104 F4.2 mag e_zmag [0.04/0.45]? Uncertainty in zmag (1)
106-111 A6 --- Inst Instrument
113 A1 --- n_Inst [ab] Note on Inst (2)
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Note (1): Early 3σ limit from ASAS-SN observations.
Note (2): Note as follows:
a = 20-cm Celestron C8 telescope with Mammut L429 Camera + Sony ICX420 CCD;
Observatory Inmaculada del Molino (OIM), Osuna (Spain);
b = 51-cm RCOS telescope with SBIG STXL-6303 camera, New Mexico Skies
Observatory (NMSO), Mayhill (New Mexico, USA).
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 6 F6.2 d Phase [-12.96/66.28] Phase from the r-band maximum
8 A1 --- l_logL [<] Limit flag on logL
9- 14 F6.3 [10-7W] logL [40.66/43.336] Log pseudo-bolometric luminosity
(in erg/s)
16- 20 F5.3 [10-7W] e_logL [0.063/0.076]? Uncertainty in logL
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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 IV. 2015MNRAS.449.1921P 2015MNRAS.449.1921P, Cat. J/MNRAS/449/1921
Pastorello et al. Paper VI. 2015MNRAS.449.1954P 2015MNRAS.449.1954P
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 VIII. 2015MNRAS.454.4293P 2015MNRAS.454.4293P
Pastorello et al. Paper IX. 2016MNRAS.456..853P 2016MNRAS.456..853P
(End) Tiphaine Pouvreau [CDS] 12-Dec-2019