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The Pan Starrs Survey has announced that they have found a new Globular Cluster in Crater.
This is a link to the discovery paper http://arxiv.org/abs/1403.6593
Its name is PSO j174.0675-10.8774
RA
11 36 16
DEC
-10 52 38
It looks dim on the POSS II blue image.
Attachment 1144
Amazing, quite bright and clearly visible on POSS2 Blue! In reach of many (16"+..?) amateur scopes.
Thanks for the post. I'll look for it the next time I make a run to dark skies. Just added it to my free observing book. Scroll down until you see Globular Clusters (about 3/4 of the way down)
http://www.faintfuzzies.com/Download...ngGuides2.html
Hope you guys don't mind that I posted this to CloudyNights.
Okay quick question. The link is just pulling up the page with authors and what not, but last night I could get the whole PDF... Is there a timeframe for how long the articles are available to view?
It works for me Preston?
Here is a link to the PDF paper,
http://arxiv.org/pdf/1403.6593v1.pdf
Preston,
Try the link again. This time look on the far right hand side of the page, and you'll see a box titled Download. In that box you can select the format you want, with PDF being the first one listed.
Jim
Do you think I might succeed in grabbing it on an 18"?
Regards
Akarsh
I've attempted it for three nights in a row now, using my 30" f/4.5 at 5300 feet. The conditions have been mediocre, but not terrible. Sunday night had the best conditions, and I suspected some mottling a few times. Nothing on the first night (a lot of dust in the air) and nothing tonight (poor seeing). I think it's going to take a night of exceptional seeing to tease out this one.Quote:
Originally Posted by akarsh
Jim
On the 28th I looked at PSO j174.0675-10.8774 under less than optimal conditions. The cluster showed only a very slight brighting of the background sky and was seen only a small percentage of the time with AV at 488X. Last night on the 31st under better seeing and transparency I tried again. The cluster was seen immediately at 375X as a soft glow with direct vision. The best view was with a 10MM ZAO at 488X. No stars were resolved it looked like a raged soft glow that was seen with direct vision. Two guest at my observatory also could see the cluster and confirmed my observation. Good transparency made all the difference in my observation of this new found dim cluster.
Good to hear some folks are bagging this one! Jim thanks for explanation of that website, I see people post them all the time, I just figured they made articles open download for a short period. I always thought it was a subscription service. I printed the article and put it in my binder for globular clusters. Globs have always been my favorite object in the sky.
Jim,
Thanks for the report. Tells me I shouldn't really waste my time trying it with an 18" :P
Preston,
The arXiv is an open-access database of scientific articles. Scientists across fields are increasingly submitting their papers / pre-print drafts of their papers to arXiv before they submit it to actual peer-reviewed journals. This way, everyone has access to the work, instead of being stuck behind pay-walls. Also, this speeds up the progress of research because the work reaches other scientists before the rather time-consuming process of peer-review and revision is completed.
It's a great thing, and astronomers seem to have taken to it very quickly, as have many theoretical physicists and computer scientists. This makes research accessible to people in developing countries, or people who are not affiliated with universities.
Last Sunday night I had a chance to look at this object with my grab and go scope (the 82" at McDonald). We had better than average seeing and good transparency. My notes:
"At 406x, the gc was detected as an intermittent sparkling using averted vision, with the brightest 2 stars seen with direct vision.
At 617x, the brightest 4 stars were held directly, while a couple of dozen stars were seen with averted as a sprinkling of dim pinpoints.
We tried 833x, but the seeing wouldn't support that much power, and the scattering of dim stars blurred out into a haze."
Another positive catch Jimi.
I tried this guy with the 27" under good transparency last days. With 293x I could not detect anything, also not the central foreground? stars. With 172x (EP 4mm) the glow was obvious. Frank and Friedl saw exactly the same thing. A round structureless glow with a little bit concentration to the middle. We could hold it with averted vision. Next days I will sketch the observation more exactly.
Nice Observation Uwe. I have not tried it this spring. I will give it a go again!!!
Thanks, Alvin.
Again, it is very generous of you to do this.
Jim, am I envious of your grab and go scope!:D
Regards
Akarsh