Subject: 3.5m Exposure Calculator *and* APO Standard Star Finder

From: Geza Gyuk

Submitted: Tue, 25 Jun 2002 15:21:16 -0500 (CDT)

Message number: 594 (previous: 593, next: 595 up: Index)

Hello,

I have just completed two web based programs that I believe will be of
some use to the APO/SPIcam community, especially to those just starting to
use the 3.5m (graduate students, postdocs, new faculty).

They can be accessed at 

http://cygnus.uchicago.edu/~geza/APOcalc.html
http://cygnus.uchicago.edu/~geza/StandLoc.html

The first is an exposure calculator for the 3.5m/SPIcam combination. The
interface is based on the KPNO exposure calculators but allows one to
specify either the Sloan ugriz or the UBVRI filter set. Since SPIcam is
usually binned, the binning is adjustable. I have checked the calculator
against a recently observed standard star and it appears to be optimistic
by about 20% depending on band. Alternatively the night was not
photmetric!

The second is a standard star locator. Given the local APO time (either
civil or sidereal) and the location of the primary target, it will
suggest standard stars ranked by difference in airmass and distance from
target. Both ugriz and UBVRI filter sets are supported with 158 and 267
standards repectively.

Please send me feedback about these calculators! The more feedback that
better I can know if they are useful or what to change. I particularly
would appreciate feedback on whether the exposure calculator is getting
figures in the ballpark or not. Also, if you have a favorite set of
standards, for example perhaps for spectrometry or narrowband work please
contact me about getting it included as an option.

Thanks,

Geza Gyuk

Research Scientist
University of Chicago

and

Research Astronomer
Adler Planetarium & Astronomy Museum





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