Hi All
I would like to let all know that I discovered a bright Type II supernova In PGC59373 a 11.60 mag galaxy in ARA only 52 million light years distance, a couple of nights back.
As of tonight it currently shines at mag 13.10 and is getting brighter. Spectra has been taken and we are waiting to get the final typing for this Supernova. Preliminary analysis shows a very blue continuum and Professionals I have talked to speculate this may be a SN 1979C-like event but this isn’t confirmed yet.
Observations continues and we look forward to see the results and hope it will be announced through CBAT soon.
I have included an image which shows the new supernova near a cluster of stars once again I have been told that It's likely the SN progenitor star was associated with that cluster in the host galaxy. Moreover, the progenitor was likely one of the most massive members of that cluster but not necessarily any of the ones shown here. This would make an interesting target in future years.I look forward to hearing other peoples observations.Here is the TOCP data
Thanks
Stu
Parkdale Observatory-New Zealand
TOCP Designation: PSN J16590243-6011418
Observation Date: 2013 04 23.542
J2000 Position: 16 59 02.43 -60 11 41.8
Magnitude: 13.5 U
Offset (arcseconds): 3W 76N
Locale: ESO 138-G010 (PGC59373)
More info can be seen here: http://www.rochesterastronomy.org/snimages/ and http://www.bosssupernova.com/
Well done Stu! At least there's some clear weather on the eastern seaboard for follow up work. I'd like to try to get some photometry data (unfiltered, just for a learning experience), but I'm taking my girls camping this weekend.
HI guys,
yes, Stu is on fire this year. Unfortunately, the same can't be said of the rest of us due to the weather here in SE Qld since mid January, so we feel as though we are dragging the chain here. I can't remember the last time that we have been so badly affected by clouds 'n rain.
However, with the recent retreat of the monsoon further north, we have seen some clear skies over the last week that actually last longer than 15 minutes at a time, so we are hopeful that we can get back into searching again. Well, at least for me, i've checked about 1500 galaxy images since 1 April, which is a record for a long time, so, fingers crossed....
Excellent Stu + Team great stuff! I love seeing these new discovery threads pop up, gives me an interesting target to try for.
Congrats and here's to many more discoveries
Well done guys
I'm currently taking a spectra of the SN.
It is certainly quite blue and is pretty featureless.
It has a very rough V mag of 13 but I need to check this with reliable comp stars. I will post the spectra when I finish.
cheers
The spectra is very flat and featureless.
Gelato matches it to a SN11n at 7 days but it is pretty hard to be sure with so few features. I took 75mins of exposure but this only gave me a SN of about 15. See attached.
Cheers
Hi Terry
Great work as usual.I was told that it was very featurless by the pros that is why thay had to wait for a few days before deciding on a type IIL
Here is Dans comments you may understand this more than me
report that low-dispersion spectra (range 320-900 nm) obtained on April 25.0, 25.9, 27.9, and 30.0 UT with the 10-m SALT telescope (+ RSS) of PSN J16590243-6011418 = 2013xx show it to be a young and luminous type-II supernova. All spectra are dominated by a strong blue continuum and weak yet broad P-Cyg absorptions associated with H Balmer, Na I, Fe II and potentially Si II lines that have been slowly increasing in strength between epochs. After correcting for a redshift of z = 0.0035, measured from narrow H_alpha and H_beta lines and consistent with the redshift of the host galaxy ESO 138-G010 (Koribalski et al. 2004), the velocities of these P-Cyg absorptions are of order 6000-8000 km/s. We note that the narrow (FWHM < 250 km/s) H_alpha profile exhibits a blue-to-red asymmetry that suggests it may associated with the supernova. These data currently indicate 2013xx to possibly be a type-IIL/IIn intermediate object, although further observations are encouraged to verify this classification.
Quote:
Originally Posted by Terry B
The spectra is very flat and featureless.
Gelato matches it to a SN11n at 7 days but it is pretty hard to be sure with so few features. I took 75mins of exposure but this only gave me a SN of about 15. See attached.
Cheers
