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An Alternative to the Standard Command

There are some Hydra configuration files available for observing standard stars by the normal configuration process which places FOPS in the field of the standard for guiding. This minimizes the overhead of searching for guide stars in the standard command with the gripper TV. These files are located in the ~/stdfields directory of the fibwiyn account and are usable from the hydra visitor account (the program looks in this directory as well as in the fields directory for hydra configuration files).

Hydra can be configured for such files following the normal field configuration process ( setup field and setup observe ). Just type in the name of the file when prompted as you would your other files.

Type

ls /home/fibwiyn/stdfields

to see the list of files available in that directory.

The current list of standards available in configuration file format are:

BD+284211 in file fxb.bd284211.hydra or fxr.bd284211.hydra
Feige 34 in file fxb.bd284211.hydra or fxr.bd284211.hydra
Feige 66 in file fxb.bd284211.hydra or fxr.bd284211.hydra
Feige 67 in file fxb.bd284211.hydra or fxr.bd284211.hydra
Feige 110 in file fxb.bd284211.hydra or fxr.bd284211.hydra
G191B2B in file fxb.bd284211.hydra or fxr.bd284211.hydra
GD 140 in file fxb.bd284211.hydra or fxr.bd284211.hydra
Hiltner 600 in file fxb.bd284211.hydra or fxr.bd284211.hydra
HZ 44 in file fxb.bd284211.hydra or fxr.bd284211.hydra
PG0823+546 in file fxb.bd284211.hydra or fxr.bd284211.hydra
Wolf 1346 in file fxb.bd284211.hydra or fxr.bd284211.hydra

The fx indicator shows that the star is a flux standard. The fxr files are for slit position 50 of the red cable. Observations through slit position 50 of the blue cable are made by configuring the fxb files.

NOTE: We have not yet verified that these files are astrometrically viable. Please use at risk until we have had a chance to do so. It is also only possible to observe the star through slit position 50 at the current time.

We will attempt to add in some radial velocity standards as time permits. Such files will be indicated by an rvr or rvb prefix.

We suggest that the observer consider creating similar Hydra configuration files for their specific standards if possible. Caution must be exerted to ensure that such fields will be astrometrically viable.

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Next: USE OF SCRIPT FILES
Previous: Sample of Standard Command
Up: OBSERVING STANDARD STARS




Sam Barden
Tue Aug 29 16:45:05 MST 1995