Thanks, Joe. Novae used to be discovered by "blinking". Two photographs of the same region would be taken, days, weeks, or months apart, and the researcher would compare the two by looking at each in rapid succession on a device called a "blink comparator". Any star seen on one but not the earlier photograph would appear to blink on-and-off. It would be an easy, straightforward project to do the same thing on the computer, with digital images. Amateurs can easily discover novae, even today. One popular low-tech approach from another decade was the projection comparator. Two identical slide projectors with a motorized, rotating shutter in front of the lenses, so that only one slide at a time was projected. This was the "astronomy club" method. Also easier on the eyes than staring into a bino or mono viewer for extended periods of time. I'm still not getting my own posts so thanks for letting me know that it came through, Joe. --- Joe Bauman <bau@desnews.com> wrote:

Got your note, Chuck, and congrats on the sighting!

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On 21 Feb 2007, at 10:01, Joe Bauman wrote:

I'm wondering if I am getting all the posts. I've seen very few lately. Thanks, Joe

Hi Joe, To see all of the posts list has received and rebroadcast go to: http://mailman.xmission.com/lurker/list/utah-astronomy.en.html pw

On 21 Feb 2007, at 17:48, Joe Bauman wrote:

Patrick, these do look familiar. I guess I have been getting all the posts. I just expected more. Maybe crankiness by some of us (i.e., me in a past debate) caused comments to dry up. If so, I apologize and beg former contributors to get back into it. Thanks, Joe

Egads, I hope no one feels they need to apologize for stuff that has been posted here. Not only have posts here been just part of an exchange of ideas amongst (mostly) friends, the stuff I've seen here is downright tame compared to the flame wars and personal insults I see getting splattered around some of the other groups I'm subscribed to. pw

Checking here proved that I am not getting most other's posts as well. Of all posts logged, I get about one in six, regardless of originator. --- Patrick Wiggins <paw@wirelessbeehive.com> wrote:

To see all of the posts list has received and rebroadcast go to:

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And, of course, the spam folder scenario doesn't explain why some posts are delayed by days, but eventually show-up. --- Chuck Hards <chuckhards@yahoo.com> wrote:

OK, Rich provided the clue.

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I have on occasion had the same thing happen. I'm not sure how Yahoo's spam filter works (of course they don't really want people to know the specifics or the spammers would use that info to get around the filter) but I do think it tends to be particularly suspicious of mail that comes from a different IP address than what is listed as the return address. Of course the Utah-astronomy list postings fall into that category. It does however, seem to be fairly teachable, so identifying mail in the bulk folder as "Not Spam" helps to keep it from going there next time. In my case anyway, it seems to be worthwhile turning off the immediate delete and checking the folder once in a while. There occasionally is other stuff that shows up there that I would like to see. --- Chuck Hards <chuckhards@yahoo.com> wrote:

OK, Rich provided the clue.

It turns out that, randomly, a few weeks ago, some posts from utah-astronomy started going into my bulk folder (spam), where I have directed that they be deleted on receipt.

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Chuck, Do you have filters set up on your Yahoo mail? That way you can automatically sort the Utah Astro messages to your inbox (or another folder) and make sure they don't land in the Bulk folder. Scott --- Chuck Hards <chuckhards@yahoo.com> wrote:

I still am not getting 90% of my own posts, even in my bulk folder. Ivo's was there, nothing in the "In" folder.

There were over 50 spam messages I had to glance through to pick-out the ONE utah-astronomy message that did come through in 12 hours.

This is a pain!

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Anyone remember the Problicom program run by Ben Mayer in LA? There are at least a couple of us here on UA that participated in that program back in the 70s, 80s and early 90s. As Chuck mentions we'd take pictures of the same areas of the sky once a month and then "blink" them using two slide projectors and an occulting disk. Taking the pictures was easy but scanning them was a real pain as one could never get the images to line up exactly so the images were always jumping back and forth or up and down. And the many variable stars and "Kodak novae" (tiny defects in the images that looked like stars) did not help either. It's soooo much easier today. Just shoot a couple of digital images, stick them in a program like CCDSoft and the software aligns them precisely, blinks them and even highlights any possible novae. Memory lane... pw On 21 Feb 2007, at 09:57, Chuck Hards wrote:

Novae used to be discovered by "blinking". Two photographs of the same region would be taken, days, weeks, or months apart, and the researcher would compare the two by looking at each in rapid succession on a device called a "blink comparator". Any star seen on one but not the earlier photograph would appear to blink on-and-off.

It would be an easy, straightforward project to do the same thing on the computer, with digital images. Amateurs can easily discover novae, even today.

One popular low-tech approach from another decade was the projection comparator. Two identical slide projectors with a motorized, rotating shutter in front of the lenses, so that only one slide at a time was projected. This was the "astronomy club" method. Also easier on the eyes than staring into a bino or mono viewer for extended periods of time.

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