J/ApJ/787/163 Photometric data for SN 2009ip (Graham+, 2014)
Clues to the nature of SN 2009ip from photometric and spectroscopic evolution
to late times.
Graham M.L., Sand D.J., Valenti S., Howell D.A., Parrent J., Halford M.,
Zaritsky D., Bianco F., Rest A., Dilday B.
<Astrophys. J., 787, 163 (2014)>
=2014ApJ...787..163G 2014ApJ...787..163G (SIMBAD/NED BibCode)
ADC_Keywords: Stars, supergiant ; Stars, variable ; Stars, B-type ;
Photometry, UBVRI ; Photometry, SDSS
Keywords: circumstellar matter - stars: mass-loss - stars: variables: general -
supernovae: individual: 2009ip
Abstract:
We present time series photometric and spectroscopic data for the
transient SN 2009ip from the start of its outburst in 2012 September
until 2013 November. These data were collected primarily with the new
robotic capabilities of the Las Cumbres Observatory Global Telescope
Network, a specialized facility for time domain astrophysics, and
includes supporting high-resolution spectroscopy from the Southern
Astrophysical Research Telescope, Kitt Peak National Observatory, and
Gemini Observatory. Based on our nightly photometric monitoring, we
interpret the strength and timing of fluctuations in the light curve
as interactions between fast-moving ejecta and an inhomogeneous
circumstellar material (CSM) produced by past eruptions of this
massive luminous blue variable (LBV) star. Our time series of
spectroscopy in 2012 reveals that, as the continuum and narrow
Hα flux from CSM interactions declines, the broad component of
Hα persists with supernova (SN)-like velocities that are not
typically seen in LBVs or SN impostor events. At late times, we find
that SN 2009ip continues to decline slowly, at ≲0.01 mag/day, with
small fluctuations in slope similar to Type IIn supernovae (SNe IIn)
or SN impostors but no further LBV-like activity. The late-time
spectrum features broad calcium lines similar to both late-time SNe
and SN impostors. In general, we find that the photometric and
spectroscopic evolution of SN 2009ip is more similar to SNe IIn than
either continued eruptions of an LBV star or SN impostors but we
cannot rule out a nonterminal explosion. In this context, we discuss
the implications for episodic mass loss during the late stages of
massive star evolution.
Description:
Photometric monitoring of SN 2009ip began on 2012 September 22 with
the spectral camera on Faulkes Telescope South (FTS, Siding Spring
Observatory, Australia) in filters g'r'i'. The spectral camera is a
4096x4096 pixel Fairchild CCD with a 10.5' field of view. As
Faulkes South monitored the rise of SN 2009ip, LCOGT's first three
southern 1 m telescopes arrived on site at Cerro Tololo Inter-American
Observatory in Chile. Photometric monitoring of SN 2009ip from CTIO
began when the telescopes were operational, about one month later on
UT 2012 October 21, with the first generation deployment camera: SBIG
CCDs with a 15' field of view.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
22 23 08.26 -28 56 52.4 SN 2009ip = SN 2009ip
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 142 169 LCOGT photometry for the 2012-B event
of SN 2009ip
table3.dat 78 50 UBVRI Local Sequence Stars
table4.dat 67 52 SDSS griz Local Sequence Stars
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See also:
II/294 : The SDSS Photometric Catalog, Release 7
(Adelman-McCarthy+, 2009)
J/MNRAS/433/1312 : SN2009ip UBVRI, UVOT and JHK light curves (Fraser+, 2013)
J/ApJ/763/L27 : RI light curves of the type IIn SN 2009ip (Prieto+, 2013)
J/ApJ/768/47 : Swift/XRT 0.2-10keV observations of SN2009ip (Ofek+, 2013)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "date" Date Date of the observation
12- 16 F5.2 mag FTSgmag ? LCOGT 2m Faulkes Telescope g band magnitude
18- 21 F4.2 mag e_FTSgmag ? Uncertainty in FTSgmag
23- 27 F5.2 mag FTSrmag ? LCOGT 2m Faulkes Telescope r band magnitude
29- 32 F4.2 mag e_FTSrmag ? Uncertainty in FTSrmag
34- 38 F5.2 mag FTSimag ? LCOGT 2m Faulkes Telescope i band magnitude
40- 43 F4.2 mag e_FTSimag ? Uncertainty in FTSimag
45- 49 F5.2 mag 1mgmag ? LCOGT 1m g band magnitude
51- 54 F4.2 mag e_1mgmag ? Uncertainty in 1mgmag
56- 60 F5.2 mag 1mrmag ? LCOGT 1m r band magnitude
62- 65 F4.2 mag e_1mrmag ? Uncertainty in 1mrmag
67- 71 F5.2 mag 1mimag ? LCOGT 1m i band magnitude
73- 76 F4.2 mag e_1mimag ? Uncertainty in 1mimag
78- 82 F5.2 mag 1mzmag ? LCOGT 1m z-short band magnitude
84- 87 F4.2 mag e_1mzmag ? Uncertainty in 1mzmag
89- 93 F5.2 mag 1mUmag ? LCOGT 1m Johnson U band magnitude
95- 98 F4.2 mag e_1mUmag ? Uncertainty in 1mUmag
100-104 F5.2 mag 1mBmag ? LCOGT 1m Johnson B band magnitude
106-109 F4.2 mag e_1mBmag ? Uncertainty in 1mBmag
111-115 F5.2 mag 1mVmag ? LCOGT 1m Johnson V band magnitude
117-120 F4.2 mag e_1mVmag ? Uncertainty in 1mVmag
122-126 F5.2 mag 1mRmag ? LCOGT 1m Cousins R band magnitude
128-131 F4.2 mag e_1mRmag ? Uncertainty in 1mRmag
133-137 F5.2 mag 1mImag ? LCOGT 1m Cousins I band magnitude
139-142 F4.2 mag e_1mImag ? Uncertainty in 1mImag
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Hour of Right Ascension (J2000)
4- 5 I2 min RAm Minute of Right Ascension (J2000)
7- 11 F5.2 s RAs Second of Right Ascension (J2000)
13 A1 --- DE- Sign of the Declination (J2000)
14- 15 I2 deg DEd Degree of Declination (J2000)
17- 18 I2 arcmin DEm Arcminute of Declination (J2000)
20- 23 F4.1 arcsec DEs Arcsecond of Declination (J2000)
25- 29 F5.2 mag Umag ? The Johnson U band magnitude
31- 34 F4.2 mag e_Umag ? Uncertainty in Umag
36- 40 F5.2 mag Bmag The Johnson B band magnitude
42- 45 F4.2 mag e_Bmag Uncertainty in Bmag
47- 51 F5.2 mag Vmag The Johnson V band magnitude
53- 56 F4.2 mag e_Vmag Uncertainty in Vmag
58- 62 F5.2 mag Rmag ? The Cousins R band magnitude
64- 67 F4.2 mag e_Rmag ? Uncertainty in Rmag
69- 73 F5.2 mag Imag ? The Cousins I band magnitude
75- 78 F4.2 mag e_Imag ? Uncertainty in Imag
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Hour of Right Ascension (J2000)
4- 5 I2 min RAm Minute of Right Ascension (J2000)
7- 11 F5.2 s RAs Second of Right Ascension (J2000)
13 A1 --- DE- Sign of the Declination (J2000)
14- 15 I2 deg DEd Degree of Declination (J2000)
17- 18 I2 arcmin DEm Arcminute of Declination (J2000)
20- 23 F4.1 arcsec DEs Arcsecond of Declination (J2000)
25- 29 F5.2 mag gmag SDSS g band magnitude
31- 34 F4.2 mag e_gmag Uncertainty in gmag
36- 40 F5.2 mag rmag SDSS r band magnitude
42- 45 F4.2 mag e_rmag Uncertainty in rmag
47- 51 F5.2 mag imag SDSS i band magnitude
53- 56 F4.2 mag e_imag Uncertainty in imag
58- 62 F5.2 mag zmag SDSS z band magnitude
64- 67 F4.2 mag e_zmag Uncertainty in zmag
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 30-Jun-2017