BOSS PSN50 in PGC18880

[Martin Pugh]

Hi folks - excuse the cross-post from Deep Space.
As most of you probably know, Peter Marples has discovered a PSN in PGC18880 in the constellation of Pictor. Once confirmed (and that s very close) this will be the 50th SN for BOSS and a personal 6th for Peter. So I was delighted to image this upon his request.

Actually, this is an early image as last nights heat and humidity basically meant I had to throw all of the colour data away. Things improved in the early hours so I kept the luminance.

So, right now this is LRGB consisting of 3 hours, and 45 minutes each RGB. Taken with the 12.5" RCOS and STL11K. I do plan to go significantly deeper on this and will update the image idc.
http://www.martinpughastrophotograph...-PGC18880A.jpg

Congratulations to Peter and BOSS.

Cheers
Martin

[astroron (Ron)]

Nice image Martin, and the bar is so pronounced
Cheers

[CometGuy]

Good one Martin, I bet Peter will be pleased with that as it shows the fainter outer arm well. Oh and congrats to Peter on number 6!

Terry

[PeterM]

Wow Martin, very lovely image, thanks so much.
You can certainly see that fainter outer arm where the supernova is.
The supernova has now been typed as a very young Type 1a and may brighten in the high 13s, making it a definite telescope target.
should have a catalogue number from CBAT soon.

[Greg Bock (Greg Bock)]

Just beautiful Martin, it's a real buzz seeing one of our discoveries in such a great portrait, thanks a bunch for your time to drop everything and do this for BOSS!

[pvelez (Pete)]

Originally Posted by PeterM

Wow Martin, very lovely image, thanks so much.
You can certainly see that fainter outer arm where the supernova is.
The supernova has now been typed as a very young Type 1a and may brighten in the high 13s, making it a definite telescope target.
should have a catalogue number from CBAT soon.

This was distributed this am via ATel


*********************************** *********

Title: PSN J06213846-5942506 is a young type-Ia supernova
Author: N. Morrell, M. M. Phillips, C. Contreras, M. Roth, and E.
Y. Hsiao (Las Campanas Observatory); G. H. Marion (Harvard-Smithsonian
Center for Astrophysics); and M. Stritzinger (Aarhus University),
on behalf of the Carnegie Supernova Project
Queries: hsiao@lco.cl
Posted: 20 Dec 2012; 17:17 UT
Subjects:Infra-Red, Optical, Supernovae

We report that a near-infrared spectrum (range 800-2400 nm) of PSN J06213846-5942506 was obtained on Dec. 20.20 UT with the Folded-port Infrared Echellette
(FIRE) spectrograph on the 6.5-m Magellan Baade Telescope. The spectrum shows that it is a type-Ia supernova approximately a week before maximum light. The near-infrared spectrum is similar to that of SN 2003W at eight days before maximum (Marion et al. 2009, A.J. 138, 727). Adopting a redshift of z=0.008 for the presumed host galaxy PGC 18880, the velocity of the Mg II 1092.7-nm absorption feature is measured to be approximately 12,200 km/s. The latest optical photometry from the 1-m Swope Telescope is r =
14.3 mag on Dec. 20.29 UT, on the rise from the previous two nights.

*********************************** **************

Another type Ia - well done lads. Lets hope its brightens so we can try for some spectra

Pete

[Martin Pugh]

Thanks for the information there Pete.

Got another 5 hours last night on this, so a much improved image is on the way shortly.
cheers
Martin

[Andrew Pearce]

Hi All

I've observed SN 2012hr over the past couple of nights and it's brightened since discovery. On Dec 22.64 UT and 23.7 UT I estimated it as mag 13.8 on both nights. Well done to the BOSS team for discovering a bright one. As a visual variable start observer most of the SNe are way too faint to observe. You do get a buzz out of seeing a massive stellar explosion with your owb eye balls!

Regards
Andrew Pearce
Western Australia

[Colin D]

Originally Posted by Andrew Pearce

Hi All

I've observed SN 2012hr over the past couple of nights and it's brightened since discovery. On Dec 22.64 UT and 23.7 UT I estimated it as mag 13.8 on both nights. Well done to the BOSS team for discovering a bright one. As a visual variable start observer most of the SNe are way too faint to observe. You do get a buzz out of seeing a massive stellar explosion with your owb eye balls!

Regards
Andrew Pearce
Western Australia

Thanks Andrew.
Keep the visual obs coming. The weather here hasn't been too kind since Peter's discovery.
Will be interesting to follow the light curve through to max and beyond.