View Full Version here: : Supernova- A nudder one for Stu & BOSS
14-11-2011, 08:07 AM
Hi IIS folks literally hot off the press, just one day back from the AIC (imaging conference) in USA and Stu Parker has discovered his 23rd SN (suspect at this stage). Catalogued as PSN J22571177-4323048, CBAT TOCP discovered 2011/11/12.476 - Galaxy IC5267 in Grus.
Congrats Stu you are a machine. The BOSS total now stands at 27 and this is quite an achievement for amateurs working together.
Stu had taken 300 images when he found the object and gave me a call. As usual Greg Bock was quick to get positional and magnitude data and we both checked for known minor planets. known variables and recent discoveries. Colin Drescher then double checked everything before posting on CBATs TOCP page (see below).
We needed another image but here in Brisbane we were totally clouded. We called on colleagues around Australia - Joe Brimacombe in Cairns and Roger Groom in WA who were as usual very keen to assist, Joe was able to get an image while Roger was unfortunately clouded out. We have several other contacts in NSW but the weather maps ruled them out.
Contact was made with our professional colleagues in South Africa (SALT) and Chile (Las Campanas) and at this stage there is some excitement in this particular galaxy as it appears it is already a target of interest for some professionals. So we expect a spectra will be done fairly quickly.
At mag 15.5 (unfiltered) this is a good target for IIS imagers. The galaxy is also bright and well worthy of an image on its own.
Will keep you informed as things progress and no doubt Stu will have some words when he comes down to Earth.
Images can be found here
The TOCP page where new transients are logged can be found here
14-11-2011, 08:28 AM
Incredible work and hearty congratulations to Stu and the BOSS team yet again!
14-11-2011, 08:47 AM
Great job done by the group AGAIN!!
Attached is the first image quite poor but a start. We have had terrible weather here last month with only about 60 galaxies images where as my normal amount it 3-4,000.So it was lucky Greg got his SN last month. I also have been away at the advanced imaging conference in the USA last week and saw Mark Bolton over there as well which was great.
So this night was the first night out for ages!!!! So I guess there is a bit of luck with this one I guess.There was also bright moon light which didnt help.
This makes 4 SN visible in the sky currently that has been discovered by BOSS so that is fantastic. Hopefully the spectra will be done tonight or tomorrow.
Great work by all the team.
14-11-2011, 09:42 AM
All BOSS team members have been members of the Ice In Space community for some time. Indeed we have had much encouragement and feedback from this community. Several community members have been very keen to assist where follow up images were needed, so a thanks from us. Hopefully we are not becoming hohum with our successes and you still enjoy us bringing them to you. I guess we just want to show how everyday amateurs can still contribute to the science of astronomy if you wish to and at the same time have an absolute ball doing it. Talk about living the dream ... the astro dream that is.
Looking forward to those great IIS member images of this galaxy and the "guest" star .... Mr Bradley and others.
Now it must be my turn to find anudder one.
14-11-2011, 10:59 AM
Keep them coming guys, always good to hear of another discovery. Definitely not 'ho hum'stuff for sure.
Now just going to fire up Stellarium and find that Galaxy ....
14-11-2011, 11:14 AM
well done Stu et al
14-11-2011, 11:23 AM
Keep 'em coming.
Its great to be able to see what amateurs can do. Gives us amateur amateurs hope that maybe one day we too can discover something never before seen.
And its good to be able to have braging rights to say I'm a member of the same forum as you guys.:D
15-11-2011, 01:00 AM
I had a go at it tonight.
This one is in a very nice spot, almost zenith at twilight end.
Even though I had pretty good seeing it was a warmish night
and the ccd cooling was very noisy for some unknown reason.:mad2:
So I did a set cooled and uncooled.
Here is the uncooled, north at top, ambient got down to 16
but uncooled CCD was 23.0C grrrr
Well done guys!:thumbsup:
15-11-2011, 07:58 AM
Steve it's great to see IISers getting images of these discoveries, congrats indeed.
We have just found out that this SN is possibly very young and could get to mag 12.5! So we await the spectra. I have seen correspondence between more professionals than usual on this one AND its being touted as a possible Hubble Space Telescope target!
Congratulations Stu and the Boss team!
Looking forward with great interest on the results of this SN.
You guys are amazing!!!:eyepop:
Congrats to Stu and the team. :thumbsup:
You guys are starting to become legends. :)
15-11-2011, 12:43 PM
Don't really need to say more than that - well done gents.
Will try to steer the camera towards this if the weather obliges this weekend.
Congratulations to Stu and all involved!
15-11-2011, 04:09 PM
yes, another amazing discovery by Stu. As it turned out, I was imaging about 30 degrees to the west of Stu when he picked this one up. I didn't get that far east as I needed some sleep, just the luck of the draw.
It was another team effort once the discovery was made. On Sunday morning, I did the initial positional analysis and checking for Stu to make sure it wasn't already known, or an asteroid, or a variable star. Once done, I was running late to go out for the day with Kath, so I had to pass it over to Colin to double check the positions and brightness prior to preparing the announcement for the Central Bureau for Astronomical Telegrams (CBAT) TOCP page. http://www.cbat.eps.harvard.edu/unconf/tocp_ra.html
Peter and I were then on standby to get a confirming image for Stu later on Sunday night, but as usual, the clouds didn't play ball.
So, for now, we have to wait for the spectral analysis from Las Campanas which is the final proof.
I have a record of all (27 to date) of the BOSS discoveries that I will post here once the spectrum confirms the type of supernova that we have.
Congratulations again Stu, this is number 21. Happy 21st!!!
15-11-2011, 06:02 PM
15-11-2011, 08:20 PM
Another bright one for you guys congratulations!
15-11-2011, 09:44 PM
Really well done Stu and Boss team.
Exceptional dedication brings well deserved rewards.
15-11-2011, 09:56 PM
Well done Stu and team. What champs. And another SN to go looking for visually. Bring on the clear skies! and maybe we can have a BOSS supernova party at Snake Valley.
16-11-2011, 09:31 AM
Another excellent discovery, Stu.
The arms in this galaxy are very fine, and the knots look small.
It does not look like the sort of galaxy that has a lot of surviving supergiant stars.
Could this be a type 1a ( non- core collapse) object?
The old photograph of this galaxy (chemical process) in the Carnegie Atlas of Galaxies is excellent:
Here is another goodish image, this time a composite of blue and red DSS images that I downloaded from the Aladin version of DSS:
If you go to //hla.stsci.edu, and look up the HST images of this galaxy, you can find a nice image of an unusual dust lane bisecting the bulge; this lane looks like it could be a polar feature.
I seem to recall once discussing with Mr Marples that, while (on the whole) the core-collapse events are more common, certain very massive galaxies without much current star-formation do seem to have plenty of type 1a events.
16-11-2011, 09:40 AM
thanks for the links to the images here.
Yes, the galaxy arms are thinly populated and sparse, it's very pretty galaxy. Stu has a 15 minute image that shows those features quite well.
We are still waiting for the spectrum to be confirmed, but we were advised yesterday that at first glance, it looks like a recent core collapse, probably a type IIb, or type II.
16-11-2011, 10:12 AM
Great News Stu,also the BOSS team for their stirling work.
Also to Robert for your follow up information on the galaxy,brilliant as usual:thumbsup:
16-11-2011, 10:52 AM
here's a quick image of the new PSN in IC5267 grabbed between clouds to highlight the location for you.
It's only 11 images of 30 seconds each combined while clouds drifted through.
16-11-2011, 06:36 PM
From CBET 2902 (hopefully CBAT don't mind me posting this):
"SUPERNOVA 2011hs IN IC 5267 = PSN J22571177-4323048
Colin Drescher, Calamvale, Queensland, Australia, reports the discovery by Stuart Parker (Oxford, Canterbury, New Zealand) of an apparent supernova (red mag 15.5, measured by Drescher) on a 30-s unfiltered CCD image taken on Nov. 12.476 UT using a 35-cm Celestron C14 reflector (+ ST10 CCD camera)."
16-11-2011, 06:46 PM
I imaged it last night for a few hours.
I'll post it later once its processed. It is a pretty galaxy. I am surprised it hasn't been imaged popularly.
You BOSS guys know all the cool galaxies!
16-11-2011, 08:09 PM
Thanks for that Terry,that's just what we've been waiting for.
16-11-2011, 08:17 PM
Thanks Terry.For some reason I havent seen this yet?
Here is my latest image of the new SN.Just not getting enough clear skies for RGB...bugger this is 3X5 min lum
Thanks for all the great posts!!!
16-11-2011, 08:52 PM
I captured an hour of it last night.
Planewave CDK17, FLI Proline 16803, PME, 6 x 10 minutes.
16-11-2011, 09:04 PM
Liking this wider field. Nice work Greg.
16-11-2011, 10:17 PM
17-11-2011, 12:25 AM
as I said yesterday, here is the record of discoveries by the BOSS team, now updated wth Stu's latest, 2011hs..FYI, his 21st.
17-11-2011, 10:22 AM
17-11-2011, 10:56 AM
Wowee Stu, another hypernova, the second since July this year!!! 2011ei was also a hypernova in NGC6925.
17-11-2011, 07:08 PM
Nice image Greg B
Showes good detail
17-11-2011, 11:57 PM
Some lovely images guys.
Here's my set from tonight, through high cloud and an ambient of
Cooled set but the cloud made the background fog a bit.
Seeing was very good.
19-11-2011, 11:17 AM
There is an extant H-alpha image of this galaxy in a recent paper by Ron Buta and Colleagues.
I have sought permission from Buta to publish it in this thread!
The H-alpha emission from this galaxy looks faint, which is indicative of a very modest overall rate of formation of massive stars, and a modest population of supergiant stars in this galaxy. Therefore, there ought not to be a high incidence of type II supernovae due to the core-collapse of massive stars.
The overall stage of this galaxy in the Hubble Sequence is S0/a, as given in this paper, and with a well-defined outer ring.
The S0/a galaxy type is a bit of a "catch all" for those galaxies which display more blue knots than an S0 galaxy but less blue knots than an Sa galaxy.
21-11-2011, 02:42 AM
Another image, this one from tonight, 20 Nov
Very good seeing tonight, was able to upsample/sharpen a bit
more....bit of a gradient though.
28-11-2011, 01:17 PM
FWIW, I managed to get about 50 minutes of luminosity of IC5267 on 19 November. Skies haven't co-operated since to get more. I do have some limited RGB data, but i'ts not processed yet.
Even though the image was taken at home in Windaroo which is affected by light pollution form Brisbane and the Gold Coast, the delicate and sparsely populated outer arms are quite obvious. Very pretty.
Meade 14", F7, ST10XEI, binned 2x2, no filter - composite of 26 x 2 minute images, Losmandy G11 Skywalker.
28-11-2011, 02:34 PM
I observed IC5267 last night with the 16" scope and high mag and the Supernova was not visible.
The Nuculus is quite bright and would make this SN difficult even if it was brighter.
28-11-2011, 02:43 PM
Not visible in the 16"?? Ahhh, the delights of CCD imaging, no probs there!!!
I'll be away until mid December, so no more chances to see or image it.
Happy birthday Ron.
28-11-2011, 02:55 PM
Thanks Greg :thanx:
I know you have been there done that in regards to visual searching for SN :P
Have a good holiday:D
02-12-2011, 01:04 PM
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