J/A+A/585/A19 SN 2014J BV light curves (Bonanos+, 2016)
Evidence for rapid variability in the optical light curve of the Type Ia
SN 2014J.
Bonanos A.Z., Boumis P.
<Astron. Astrophys. 585, A19 (2016)>
=2016A&A...585A..19B 2016A&A...585A..19B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Supernovae ; Photometry
Keywords: supernovae: individual: SN 2014J - supernovae: general -
galaxies: individual: M82
Abstract:
We present results of high-cadence monitoring of the optical light
curve of the nearby, Type Ia SN 2014J in M82, using the 2.3m
Aristarchos telescope. B and V-band photometry on days 15-18 after
tmax(B) was obtained with a cadence of 2 min per band, revealing
evidence for rapid variability at the 0.02-0.05mag level on timescales
of 15-60min on all four nights. The decline slope was measured as
steeper in the B-band than in the V-band, and to steadily decrease in
both bands from 0.15 mag/day (night 1) to 0.04mag/day (night 4) in V,
and from 0.19mag/day (night 1) to 0.06mag/day (night 4) in B,
corresponding to the onset of the secondary maximum. We propose that
rapid variability could be due to one or a combination of the
following scenarios: the clumpiness of the ejecta, their interaction
with circumstellar material, the asymmetry of the explosion, or the
mechanism causing the secondary maximum in the near-infrared light
curve. We encourage the community to undertake high-cadence monitoring
of future, nearby and bright supernovae to investigate the intraday
behaviour of their light curves.
Description:
Calibrated differential photometry of SN 2014J compared to S1 in the V
and B-bands.
Objects:
---------------------------------------------------------------
RA (2000) 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
table2.dat 25 2391 Calibrated differential photometry of SN 2014J
compared to S1 in the V and B-bands
--------------------------------------------------------------------------------
See also:
J/ApJ/799/105 : KELT light curve of the M82 SN 2014J (Siverd+, 2015)
J/ApJ/805/74 : SN2014J Swift/UVOT light curves (Brown+, 2015)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.5 d HJD Heliocentric Julian Date (HJD-245000)
12 A1 --- Filt [BV] Filter
15- 19 F5.3 mag dmag SN-S1 magnitude difference
21- 25 F5.3 mag e_dmag Error in SN-S1 magnitude difference
--------------------------------------------------------------------------------
Acknowledgements:
Alceste Zoe Bonanos, bonanos(at)astro.noa.gr,
IAASARS, National Observatory of Athens, Greece
(End) A.Z. Bonanos [Nat. Observ. Athens, Greece], P. Vannier [CDS] 04-Nov-2015