UIS Henry Barber Research Observatory

20-inch Telescope SN 2012bv

Supernova Impostor Project

This material is based on work supported by the National Science Foundation (NSF) under grant number 1108890 to study the terminal phases in the evolution of stars that are hunderds of times the mass of our own sun. Here is a link to that NSF award in their database. Any opinions, findings and conclusions or recomendations expressed in this material are those of the author and do not necessarily reflect the views of the National Science Foundation (NSF).

We are using the 20-inch and 16-inch telescopes to monitor the brightness fluctuations of massive Luminous Blue Variable stars in nearby galaxies M31 and M33. We are also following the longterm light fluctuations of supernova impostors discovered by supernova searches. As of the awarding of this NSF grant in 2011 only a handfull supernova impostors had been identified and studied. Those that we did know about had little in common with each other rather than the defining characteristics of their pedigree. With our collaborators at the University of Minnesota we aim to significantly increase the size of this sample and discern trends that will give clues to the physics behind this phenomenon.

Active Target Lists

Peculiar Type II Supernova

The following is a list of supernova that have been classified as "pecular" or that are "unclassifiable" that we have or plan to target for photometry.

Here is our page devoted to SN 2009ip

Here is our page devoted to SN 2014G

DesignationImageRA HoursDate Last Observed(*)
[Baseline of Obs]
{# of Obs}
Magnitude(+)
2013df SN 2013df 12130712
[29 days]
{5 obs}
V = 15.6
PSN J12211796+1130252 PSN J12211796+1130252 12130530
[103 days]
{2 obs}
V~18, R ~18
No change. False detection?
PTF 12dam PTF 12dam 14130711
[380 days]
{16 obs}
V ~19, R ~ 19
2012cc SN 2012cc12130613
[391 days]
{7 obs}
ND
2012by SN 2012by 13120716
[37 days]
{12 obs}
ND
2012bv SN 2012bv 19120611
[377 days]
{18 obs}
R ~ ND, V ~ ND
2012bn SN 2012bn 15120621
[12 days]
{3 obs}
ND
2011cq SN 2011cq 12120327
[0 days]
{1 obs}
ND
2011eg SN 2011eg 18120609
[0 days]
{1 obs}
ND
2011je-04--
2011W SN 2011W 00120821
[0 days]
{1 obs}
ND
2010ie SN 2010ie 09120326
[0 days]
{1 obs}
ND
2010hv SN 2010hv 23120821
[0 days]
{1 obs}
ND
2010hq SN 2010hq 07120326
[0 days]
{1 obs}
ND
2009ip SN 2009ip 22See web pageSee web page

(*) UT date expresses as two digit year, two digit month, and two digit day. i.e. March 13, 2012 = 120313

(+) Approximate! Not quatitative! Also does not account for galctic reddening. ND = not detected on images meaning that it was probably fainter than 19 or 20 magintude.


Supernova Type II-N

In the past many supernova impostors have been mis-classified as supernova type II-N. We are targeting these supernova when we have extra telescope time to use on them. This is a list of supernova type II-N that we have observed.

DesignationImageRA HoursDate Last Observed (*)
[Baseline of Obs]
{# of Obs}
Magnitude(+)
2014G SN 2014G 10See web pageSee web page
2013cj SN 2013cj 17130826
[66 days]
{10 obs}
V ~ 17.2, B ~ 17.3, R ~ 16.4
LSQ13zm LSQ13zm 10130609
[32 days]
{3 obs}
ND
LSQ12evm 22
2012cz SN 2012cz 16120626
[0 days]
{1 obs}
ND
2012as SN 2012as 151206236
[0 days]
{1 obs}
ND
2012al SN 2012al 101203296
[3 days]
{2 obs}
R ~ 18, V~18, B ~ ND
2012ab SN 2012ab 121206286
[29 days]
{4 obs}
R~15 - 16 convoluted with central bulge
2010jl - 10--

(*) UT date expresses as two digit year, two digit month, and two digit day. i.e. March 13, 2012 = 120313

(+) Approximate! Not quantitative! Also does not account for galctic reddening. ND = not detected on images meaning that it was pr obably fainter than 19 or 20 magintude.

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Last Updated: February 1, 2014

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