M101 Luminance - aka. All-Nighter!
Hi all. I took most of the night on Monday collecting luminance data on M101, and really managed to capture a lot of the dim portions of the galaxy. I ran the camera at F/3.3 for 4 hours and 10 minutes on this one, just collecting the luminance data. I will try for color soon, but I am pretty happy with this for now. Here is the link: http://www.utahastronomy.com/main.php?g2_view=core.DownloadItem <http://www.utahastronomy.com/main.php?g2_view=core.DownloadItem&g2_itemId=1 1211> &g2_itemId=11211 BTW - Does anyone know why my middle sized versions don't show up on the gallery? Every time I upload now, I get a thumbnail and the full size versions, but the reduced version shows up as a blank. Any ideas? Thanks, Tyler _____________________________________________
Hi Folks, Sorry about the long link in my earlier message. I always forget about that little problem. Here is a tinyurl version of the link to the M101 image: http://tinyurl.com/4kvqn8 Thanks, Tyler _____________________________________________ -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Tyler Allred Sent: Wednesday, May 07, 2008 10:53 AM To: utah-astronomy@mailman.xmission.com Subject: [Utah-astronomy] M101 Luminance - aka. All-Nighter! Hi all. I took most of the night on Monday collecting luminance data on M101, and really managed to capture a lot of the dim portions of the galaxy. I ran the camera at F/3.3 for 4 hours and 10 minutes on this one, just collecting the luminance data. I will try for color soon, but I am pretty happy with this for now. Here is the link: http://www.utahastronomy.com/main.php?g2_view=core.DownloadItem <http://www.utahastronomy.com/main.php?g2_view=core.DownloadItem&g2_itemId=1 1211> &g2_itemId=11211 BTW - Does anyone know why my middle sized versions don't show up on the gallery? Every time I upload now, I get a thumbnail and the full size versions, but the reduced version shows up as a blank. Any ideas? Thanks, Tyler _____________________________________________ _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com
Hi Tyler, Another Wow effort. You set the bar very high. Regarding the problem with the gallery, I get it to. I get to here ok: http://www.utahastronomy.com/main.php?g2_itemId=7374&g2_page=2 There I can see the thumbnail image but when I click on it I am taken to: http://www.utahastronomy.com/main.php?g2_itemId=11211 where all I see is a blank page with a question mark. I'll pass your message on to Cynthia and see if she can use her chief administrator privileges to fix the problem. patrick On 07 May 2008, at 10:52, Tyler Allred wrote:
I took most of the night on Monday collecting luminance data on M101, and really managed to capture a lot of the dim portions of the galaxy. I ran the camera at F/3.3 for 4 hours and 10 minutes on this one, just collecting the luminance data. I will try for color soon, but I am pretty happy with this for now.
Here is the link:
http://www.utahastronomy.com/main.php?g2_view=core.DownloadItem <http://www.utahastronomy.com/main.php?g2_view=core.DownloadItem&g2_itemId=1 1211> &g2_itemId=11211
BTW - Does anyone know why my middle sized versions don't show up on the gallery? Every time I upload now, I get a thumbnail and the full size versions, but the reduced version shows up as a blank. Any ideas?
Thanks,
Tyler
Hi Tyler, I think something must be wrong with my browser or with the gallery. When I tried to click on the top link, I got a message saying it was a security violation. I clicked on "back to gallery" and brought up your pages. I saw the thumbnail of the glorious luminance view of M101 but when I clicked on the thumbnail, no photo came up. Thanks, Joe Tyler Allred <tylerallred@earthlink.net> wrote: Hi all. I took most of the night on Monday collecting luminance data on M101, and really managed to capture a lot of the dim portions of the galaxy. I ran the camera at F/3.3 for 4 hours and 10 minutes on this one, just collecting the luminance data. I will try for color soon, but I am pretty happy with this for now. Here is the link: http://www.utahastronomy.com/main.php?g2_view=core.DownloadItem 1211> &g2_itemId=11211 BTW - Does anyone know why my middle sized versions don't show up on the gallery? Every time I upload now, I get a thumbnail and the full size versions, but the reduced version shows up as a blank. Any ideas? Thanks, Tyler _____________________________________________ _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
Joe, The link text was too long so it wrapped onto the next line. I sent another email with a shorter link. Take a look. I'm not sure why I am having so much trouble with the gallery. In the past, I just uploaded the photos and they appeared without incident. Lately, I upload the photo and it makes a thumbnail view, and creates a page that should have the reduced version, but does not. If you click on the little icon above the image and on the right, it takes you to the full version. I'm not sure if I am doing something wrong or not, because other people's images seem to work. I'm a little baffled. Thanks for trying to take a look! Tyler _____________________________________________ <Joe Bauman Wrote: <Hi Tyler, I think something must be wrong with my browser or with the <gallery. When I tried to click on the top link, I got a message saying it <was a security violation. I clicked on "back to gallery" and brought up <your pages. I saw the thumbnail of the glorious luminance view of M101 but <when I clicked on the thumbnail, no photo came up. Thanks, Joe
Holy smokes! That's amazing, Tyler. High bar, indeed. And did I see a small irregular galaxay above M101? Thanks for sharing, Joe Tyler Allred <tylerallred@earthlink.net> wrote: Joe, The link text was too long so it wrapped onto the next line. I sent another email with a shorter link. Take a look. I'm not sure why I am having so much trouble with the gallery. In the past, I just uploaded the photos and they appeared without incident. Lately, I upload the photo and it makes a thumbnail view, and creates a page that should have the reduced version, but does not. If you click on the little icon above the image and on the right, it takes you to the full version. I'm not sure if I am doing something wrong or not, because other people's images seem to work. I'm a little baffled. Thanks for trying to take a look! Tyler _____________________________________________ _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
This is excellent, Tyler. Crisp, good dynamic range, excellent detail. Not a "bloated", soft image at all. You had good seeing and your focus was dead-on. This what more folks need to work towards. How do you keep the brighter portions of galaxies (such as nuclei) from becoming overexposed blobs? This ruins a lot of otherwise good images. On Wed, May 7, 2008 at 10:52 AM, Tyler Allred <tylerallred@earthlink.net> wrote:
I took most of the night on Monday collecting luminance data on M101, and really managed to capture a lot of the dim portions of the galaxy.
Chuck Hards said: <How do you keep the brighter portions of galaxies (such as nuclei) from <becoming overexposed blobs? This ruins a lot of otherwise good images. Hi Chuck, Thanks for the encouragement. More often than not, the center of the galaxy is not blown out in the original data, but gets destroyed by the processing. The key is to be careful not to saturate the image completely during data collection, and then to carefully process the data, using levels and curves, so as to bring out the detail in the dim areas without washing out the brighter portions. Curves allow differential processing of bright and dim areas, which makes it possible to maintain detail in both. The key to processing is that you must never force anything, that wasn't pure white to begin with, into becoming pure white. I am working on a color version right now, using some crappy old color data. I will post it soon. Cheers, Tyler PS - I'm off to Florida on Friday for 10 days of flyfishing for bones and tarpon. I'll be thinking of you poor saps..... NOT! :) _____________________________________________
All amateur astronomers in Utah are invited to participate in the Bryce Canyon Astronomy Festival the nights of June 25-28. On Wednesday we will have a special star party in Panguitch, Utah about 20 miles from Bryce with six-time shuttle astronaut Story Musgrave as the keynote speaker. See below info from Kevin Poe, the ranger in charge of the event. Thursday, Friday and Saturday nights' star parties will be held at Bryce Canyon. Free camping and admission to Bryce Canyon for all days and nights of the event is offered to all volunteers who bring a scope and participate in the events. We have availability for 30 people Wednesday night and 45 people each of the other nights. So far we have 12 volunteers for Wednesday, 22 for Thursday and 29 for both Friday and Saturday. We desperately need more people for Wednesday night. If you can participate please email me at djcolton@piol.com and I will put you on the entrance station list and free camping list (if desired). I will also email you a volunteer form to send to Kevin.
From Kevin Poe:
Spread the news far and wide through SLAS that we have Story Musgrave (6 time shuttle astronaut and "mother earth defender") for the 8th Annual Astronomy Festival's Keynote Speaker! First night of the festival Wednesday June 25 we will have Story and the telescopes (I'm hoping many from SLAS can find a way to make it down here that early in the week) in Panguitch so that we can take advantage of the 1500 seat capacity of the town's Indoor Rodeo Arena. The neighboring town park has a great place to set up 25-30 scopes (I'll email pictures next week) and I'm pretty sure I can get the town to institute a voluntary "black out" for that night. Nevertheless it won't be as dark as Bryce (and the moon rises at 00:35) but this has the potential to be a most excellent outreach opportunity. Perhaps this event will serve as a launching point for future efforts to institute a county-wide lighting ordinance and to an encourage our local power company, Garkane, to phase out their "free" unshielded light fixtures that plague Southern Utah -- we've finally got an "ally" on their board of directors. To that end I'm endeavoring the make this the biggest media event since the Olympic Torch came through - inviting Congressman Jim Matheson, our Regional Chief of Interpretation, Phil Zichtermann, perhaps the director of the entire NPS, Mary Bomar, all the major television stations, etc. Needless to say we would forever be in SLAS's debt if we could count on a strong showing from your always excellent club members for that Wednesday night! Of course SLAS would be recognized as our guests of honor second only to Story Musgrave! Kevin Poe (435) 834-4412 Interpretive Park Ranger Bryce Canyon National Park
Hi Tyler (and all who post pictures on the U-A Gallery), Since I didn't see a reply from Cynthia I did a bit of digging to find an answer to the problem that is causing problems with getting to your M101 pictures. The only thing I could find is how big (as measured in pixels) the picture is. Go to the second page of my album: http://gallery.utahastronomy.com/main.php?g2_itemId=10620&g2_page=2 There you will see several versions of your M101 luminance shot. Note each title includes a number. For example the first is entitled "M101Lum500" while the next is "M101Lum1000" and so on. The number denotes how many pixels the main image is wide (I changed the size of each image in PhotoShop Elements). If your browser works like mine you'll find that if you click on any of the images up through "M101Lum1500" the corresponding large image displays fine. However, when you click on the last one, M101Lum1555, the large image does not display. That last one, BTW, is an "unshrunk" version of the one you posted to your gallery. So apparently the system does not work well with pictures with a dimension larger than 1,500 pixels. In fact, when I got above 1,000 the system starting acting up. It still loaded and displayed all but the largest images but did not seem to like it. Maybe best to keep images at 1,000 or smaller. Please let me know once you've checked my test images to see if you get the same result so I can remove them from my gallery. If you get the same result you might want to remove the full sized "M101 Luminance" shot and it's RGB cousin and replace them with versions of 1,000 pixel width or less. BTW, the RGB version really is incredible! Ok, it's been a long night. Time to turn in. Good night all! patrick :)
Thanks for the detective work Patrick. I'll change the dimensions on those when I get back from Florida. Tyler _____________________________________________ -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Patrick Wiggins Sent: Thursday, May 08, 2008 6:27 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] M101 Luminance - aka. All-Nighter! Hi Tyler (and all who post pictures on the U-A Gallery), Since I didn't see a reply from Cynthia I did a bit of digging to find an answer to the problem that is causing problems with getting to your M101 pictures. The only thing I could find is how big (as measured in pixels) the picture is. Go to the second page of my album: http://gallery.utahastronomy.com/main.php?g2_itemId=10620&g2_page=2 There you will see several versions of your M101 luminance shot. Note each title includes a number. For example the first is entitled "M101Lum500" while the next is "M101Lum1000" and so on. The number denotes how many pixels the main image is wide (I changed the size of each image in PhotoShop Elements). If your browser works like mine you'll find that if you click on any of the images up through "M101Lum1500" the corresponding large image displays fine. However, when you click on the last one, M101Lum1555, the large image does not display. That last one, BTW, is an "unshrunk" version of the one you posted to your gallery. So apparently the system does not work well with pictures with a dimension larger than 1,500 pixels. In fact, when I got above 1,000 the system starting acting up. It still loaded and displayed all but the largest images but did not seem to like it. Maybe best to keep images at 1,000 or smaller. Please let me know once you've checked my test images to see if you get the same result so I can remove them from my gallery. If you get the same result you might want to remove the full sized "M101 Luminance" shot and it's RGB cousin and replace them with versions of 1,000 pixel width or less. BTW, the RGB version really is incredible! Ok, it's been a long night. Time to turn in. Good night all! patrick :) _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com
On 08 May 2008, at 07:10, Tyler Allred wrote:
Thanks for the detective work Patrick. I'll change the dimensions on those when I get back from Florida.
Ok. And I'll get the test shots off my page (you wouldn't want anyone thinking *I* took them <grin>). patrick (still trying to turn in...)
Superb image - I love the details you managed to tease out, and it's always fun to find tiny galaxies elsewhere among the stars. --- Tyler Allred <tylerallred@earthlink.net> wrote:
Hi all.
I took most of the night on Monday collecting luminance data on M101, and really managed to capture a lot of the dim portions of the galaxy. I ran the camera at F/3.3 for 4 hours and 10 minutes on this one, just collecting the luminance data. I will try for color soon, but I am pretty happy with this for now.
Here is the link:
http://www.utahastronomy.com/main.php?g2_view=core.DownloadItem
<http://www.utahastronomy.com/main.php?g2_view=core.DownloadItem&g2_itemId=1
1211> &g2_itemId=11211
BTW - Does anyone know why my middle sized versions don't show up on the gallery? Every time I upload now, I get a thumbnail and the full size versions, but the reduced version shows up as a blank. Any ideas?
Thanks,
Tyler
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participants (6)
-
Chuck Hards -
Don J. Colton -
Joe Bauman -
Patrick Wiggins -
Richard Tenney -
Tyler Allred