Hi all, I have two smalls (and may be silly...) questions : As Astrometrica is a wonderful soft for astrometry, can i use it for photometry ? If so, what...
Astrometrica, as the name suggests, is an astrometric program. There are several photometric programs, I started to do some photometry using Canopus software...
Astrometrica isn't really designed for that. It will report magnitudes, but don't expect it to be accurate enough for any type of precise photometry. -John...
It's 03:45 UTC on 09 July 2008. I've been trying to access the MPC website (http://cfa-www.harvard.edu/iau/mpc.html) to download some ephemeris data, but the...
Yep, same problem here. Can't get one of the DSS servers either, but other sites are fine. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Robert H. McNaught...
Robert McNaught
rmn@...
Jul 9, 2008 3:54 am
3792
... website ... data, ... anybody ... accessing other ... The Computation Facility's webserver has apparently died. I can't get in from machines internal to...
I have no problems for download Mpcorb last evening, but at 5:18 U.T. the server still doesn't work. Greatings, Juan A.Henríquez http://atlante.org.es ... ...
Hello, I am just beginning my use of Astrometrica. Please excuse the naive posting. Problem: My question is prompted by the following behavior. All my images...
There's an Astrometrica parameter to indicate the saturation limit, the stars with ADUs beyond it will be considered as saturated and will not be used in the...
Michael, Further to Juan's note, I should add that when performing Track and Stack, in the dialogue box which comes up, under 'Stacking' I nearly always use...
Hello Michael, please fogive my ignorance, but I am still note sure at what point the stacking fails. Will the images not align properly, or is there some...
Hello Herbert, Thanks for your reply. I am given about 1,000 image from one night's imaging. They are in set sizes that vary from about 9 to 60. I then group...
Hello Michael, now I understand better. By using "Average" instead of "Add" for the stacking process, as suggested by Richard, you can avoid the saturation of...
Thanks, Juan. Your point is well taken. It may be that everything is working as it should. That said, the original images are great. Perhaps one or two...
Hello Richard, Thank you very much for the reply. Michael P.S. - I see Herbert has also referred to your suggestion, which I'll explore in my reply. It turns...
Hello Herbert, Just to be sure, when you say: "You can change the upper limit for the mgnitude range of the reference stars in the program settings to...
Michael, I think you may be missing a trick here. First is that you should use 'Average' rather than 'Add' if you are planning on stacking say 9-60 frames. ...
Hi Richard, Thanks. I'll give it a try. Michael P.S. - I have a few constrains. 1. The project is for high school students, where I prepare a set of three ...
... A better strategy is to stack on a typical motion for a main belt in that part of the sky. You will go much fainter for the bulk of main belt objects in...
Robert McNaught
rmn@...
Jul 24, 2008 6:42 am
3808
Thank you Robert. I will definitely implement that approach. Why waste the great stack and track features, when I already know my targets are MBA's. Right? ...
A new version of Astrometrica, V 4.5.0.372, is available. To download the updated version, go to the Astrometrica web site, http://www.astrometrica.at, and...
Further to Herbert's announcement, here are some further comments: As a further guide, users wishing to obtain the highest photometric accuracy with...
... Cousins R ... Lower Limit CMC-14 has r'-band (Sloan r) magnitudes only. How does Astrometrica produce a V and R magnitude from a single data point? ... ...
Thank you Richard for these improvements (and Herbert of course!), it's good to know that also users who do not usually work in lightcurve data can obtain a...
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