J/ApJ/799/105 KELT light curve of the M82 SN 2014J (Siverd+, 2015)
Observations of the M82 SN 2014J with the Kilodegree Extremely Little Telescope.
Siverd R.J., Goobar A., Stassun K.G., Pepper J.
<Astrophys. J., 799, 105 (2015)>
=2015ApJ...799..105S 2015ApJ...799..105S
ADC_Keywords: Supernovae ; Photometry, RI
Keywords: supernovae: individual: SN 2014J
Abstract:
We report observations of the bright M82 supernova 2014J
serendipitously obtained with the Kilodegree Extremely Little
Telescope (KELT). The supernova (SN) was observed at high cadence for
over 100 days, from pre-explosion, to early rise and peak times,
through the secondary bump. The high cadence KELT data with high
signal-to-noise ratio is completely unique for SN 2014J and for any
other SNIa, with the exception of the (yet) unpublished Kepler data.
Here, we report determinations of the SN explosion time and peak time.
We also report measures of the "smoothness" of the light curve on
timescales of minutes/hours never before probed, and we use this to
place limits on energy produced from short-lived isotopes or
inhomogeneities in the explosion or the circumstellar medium. From the
non-observation of significant perturbations of the light curves, we
derive a 3σ upper limit corresponding to 8.7x1036erg/s for any
such extra sources of luminosity at optical wavelengths.
Description:
The M82 SN 2014J was serendipitously observed by the Kilodegree
Extremely Little Telescope North (KELT-N) as part of its routine
monitoring of the northern sky. The resulting bandpass resembles a
widened Johnson-Cousins R band with effective wavelength
λeff∼691nm and width ∼318nm.
In total, we have 1869 science-grade images (980 east, 889 west)
acquired between 2013 October 8 and 2014 June 14 (JD 2456573.963 to
2456822.692). The 980 east images were acquired between 2013 October 8
and 2014 April 1 (JD 2456573.963 to 2456748.622) and the west images
acquired between 2013 November 10 and 2014 June 14 (JD 2456607.033 to
2456822.692). The combined data set spans the nominal explosion time
of JD 2456672.25 (UT) (see Zheng et al. 2014ApJ...783L..24Z 2014ApJ...783L..24Z, and see
also Section 3.1), the nominal peak time of JD 2456690.75 (UT), and
well into the late-stage dimming of the event.
Objects:
--------------------------------------------------------------
RA (ICRS) DE Designation(s)
--------------------------------------------------------------
09 55 42.12 +69 40 25.9 SN 2014J = PSN J09554214+6940260
--------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 36 887 KELT_N light curve of SN 2014J in a wide R-band
(λeff=591nm, width=318nm)
--------------------------------------------------------------------------------
See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)
J/other/NewA/20.30 : BVRI light curves of 3 SN (Munari+, 2013)
J/ApJ/761/123 : KELT-1 photometry and spectroscopy follow-up (Siverd+, 2012)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d JD Julian Date of the observation; TT
16- 26 F11.5 --- Flux [-568.6/14205.3] Flux in ADUs
28- 36 F9.5 --- e_Flux [135/303] Error in Flux
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-Jun-2015