Hello Luca, the SNR listed by Astrometrica is the peak SNR, that is, simply the signal of the brightest pixel (and only this single pixel) compared to the...
Ok Herbert, thank you very much for your quick reply. Regards, Luca ... Da: Astrometrica@yahoogroups.com [mailto:Astrometrica@yahoogroups.com]Per conto di...
Herbert, After a year of astrometric reporting I find that after studying photometric methods V is not "visual" but thru a Cousins V photometric filter. Yikes!...
Herbert, Isn't this a bit unnecessary concern? As I understand it, stars in all catalogs are NOT photometric standards. The mixture is unpredictable and ...
I have been wondering if any of the astrometric magnitude reports are used in determining the G and H values that are given in MPECs for comets. How does the...
If memory serves me well (??), determination of comet magnitudes is not an easy task. I hope I am not wrong but Astrometrica has not been designed to do that....
... You are right, the UBVR system was not even defined when the POSS I was done. But I would not call it an unnecessary concern. If you observer trough a red...
Herbert, Great to hear from you both on scientific and personal level. I prefer to keep things simple, if I can as long as it is reasonable. I believe most (if...
Dear freidns, I was recetly upgrading my new internet account. I have some hints that some (incoming and/or outgoing) messages may have been lost. So if anyone...
Thanks. I guess V is the way to go. Next time out we'll shoot thru the Cousins V, hopefully it will not attenuate to an unacceptable level. Plus we can mix in...
Unable to connect to the Harvard mirror site through Astrometrica to Track and Stack...was working fine a few weeks ago. Does anyone know if they are having a...
In the past I have occasionally run into trouble accessing the European Vizier site - and have changed to the Japanese mirror. A couple of time I have had ...
I cannot speak for Herbert, of course. But I doubt he wants to be involved in a true 'photometric' project. I mentioned here the Canopus program by Brian...
Dear friends, visit the Astrometrica web page (http://www.astrometrica.at) and click on the thumbnail image in the navigation bar at right, for season's...
Hallo Herbert, der Zielframe beim Link Mohr-Gruber ist vermutlich falsch. Dir auch schöne Weihnachten! Christian _____ From: Astrometrica@yahoogroups.com...
Christian Sturm
christian.sturm@...
Dec 23, 2006 12:16 am
3258
Hello, does anybody can explain how I can find the better aperture radius parameters for detection with the apparent diameter relations ? In astrometrica...
The FWHM is a combination of several factors - object size, telescope resolution, blurring caused by atmospheric seeing. It is an observed quantity - derived...
Yann, in addition to what Dave Herald alread explained, I just wanted t point out that the FWHM in Astrometrica is given in arc seconds, whereas the aperture...
Hi folks, The scenario: Have an open plan with one object seleted. The problem: Press any alpha-numeric key and the object is deselected. Pressing Ctrl+#...
Looks that way. Happy New Year anyway. I have to wait another hour. LN ... From: Astrometrica@yahoogroups.com [mailto:Astrometrica@yahoogroups.com] On Behalf...
Hi Juan, ... Thank you, this helps with some information, but still I can't measure the images. The downloaded fits images have a strange behavour as they show...
Dear all, I have a presentation to do to the other members of the astronomical society of my town (Rennes, France), concerning astrometry in general and the...
Sorry for the long delay in Philippe's message. It required approval by one of the moderators, because Philippe is a first-time poster and apparently no...
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