findstar

How to...

... find stars for TPoints with findstar.C

If you have taken already some TPoints, there will still be "holes" in the sky, where no TPoints have been taken yet.
The root-macro findstar.C is looking for stars in the YBS catalog, which are suitable for TPoints.

Usage:

login as operator to pc4
cd /home/caos/March06/Mars
root /home/operator/findstar.C("<dir>",<startdate>,<mag>,<size>)

options:

<dir>	The directory where the TPoints are stored (usually /home/stesy/Cosy/tpoint/)
<startdate>	The date, after which TPoints are taken into account, format YYYYMMDD (usually the first of the month, e.g. 20060801)
<mag>	The macro considers all stars which are brighter than magnitude <mag>
<size>	The size of the region in degrees (divider of 90) in zd and az, one number, e.g. 15 (divides the zd range into 6 and the az range into 24 bins)

The macro is scanning sequentially all regions of the sky defined by the <size>. The <size> is given in degrees in zd and az.
By the <size> you determine so to say a piece of cake in zd and az at the sky. The lower the <size>, the larger the number of regions.
In every region the macro looks for stars in the catalogwhich are brighter than magnitude <mag>. It displays if it found one or not and returns a list of stars suitable for Tpoints.
If there is already a TPoint in one region, the macro doesn't consider this sky region.