Hello all! Is someone so kind and explain what major axis diameter at 25mag/arcsec2 (from PGC catalogue) means and if there is a connection to magnitude and...
Charly, My understanding is that the 25mag/arcsec is very close to the background sky glow and just a measure of brightness. What they are trying to say, is ...
... Major axis is the "long axis" of an ellipse, so this is length along the long axis of the galaxy. ... More specifically, that's 25 magnitude per square...
Thank you for answering. My problem is how to compute this measure in catgen to get the necessary data. I have downloaded this catalog last week: HYPERLEDA. I....
Magnitude per square arc seond is a measure of the surface brightness of an object. You add up the light detected in an angular field one arc second on a side...
Hello all! Thank you for answering! I will try to translate and understand. I am afraid that it is no easy subjekt at all for me. @Bud: IRAF seems to be...
In the old Varobs you had a option to edit some data files, but i cant find that in the new version included in Skychart. Think thats a big problem because...
Hi all, I checked the archives, and did not find the answer, so here goes. Is there a way to put the program on a website, and allow the users of the website...
Hi Sander, I basicly bumble my way through things, and when neccesary, teach myself a new trick. I have used perl, and java before, and have toyed with ruby...
Hi Tony, I think if you had spent some time writing significant web applications you'd know you're asking an impossible thing. So that's why I wanted to know...
Hi Sander, Thanks for the information. You're right, had I any significant experiance, I would have known that. It was a thought, though. Mostly due to some...
Hi Tony, I think Sky & Telescope has a simple web/java based planetarium. But this is still not trivial and really not needed (IMO) with the availability of...
There's one more web-based charting site out there that got talked about a lot about a year ago. I thought the name was something like "Calstars" but a google...
Thanks for all the suggestions. I'm sure I'll find something that will fill their needs. Tony ... The universal brotherhood of man is our most precious...
The quickest solution to web-based star charting is to put a link on your club's web site to the Sky and Telescope web site. S & T has a web-based interactive...
Tony, You might want to look at the source code for CDC v3.0. There is example code in Perl and Java for connecting to the CDC client and generating a JPEG...
Others in the group have replied with excellent descriptions of what the 25 mag per arcsec squared measurement embodies so I won't duplicate that effort again....
Hello I am new in this group. I have a question/request about Cartes Du Ciel: In version 2.76 I used from externs folder a messier catalog with 3 files:...
Hi all, I'm working on a research article on an aspect of archaeoastronomy and I've been using CdC to plot stars and constellations. I am working on the period...
Hi makronti, I expect the use in 3.x of catalogues with .cds is similar to the one in 2.7x This kind of catalogues are installed using a slightly different...
Hello John ... method ... to ... At CDC version 3 I can't select (Add) .cds files in Catalog. By default, accept only .hdr files. That's why I ask for an...
I have to write again this message because of some errors at my first post. ... Hello I am new in this group. I have a question/request about Skychart: In...
I would like to know if I can run my DSX-2102 Mak directly from my USB port using CdC and Meade's USB cable. It would seem possible from all I've read but I'd...
Meade's USB cable is only a converter from USB to serial. You also need a serial cord for your scope. I think your scope uses the simplest Autostar handbox-...
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