DFOSC Set Up Form

This form can be used to specify your instrument set-up for DFOSC. Fill in the form (click on hypertext links if you need help) and then click on the `Submit' button. A postscript file will be generated, and this can be emailed to 2p2team@eso.org.

Please avoid using `special characters' such as # and \ in the form -- they cause problems. A solution is currently being sought.

DFOSC Set Up Form Version 1.0 -- Copyright©(1998) J.Brewer/European Southern Observatory

General Description

This exposure time estimator uses an HTML form to submit data to a PERL script via the Common Gateway Interface. The PERL script processes the parameters, and then uses the UNIX sed command to sustitute them into a LaTeX template file. This template is then used to produce a postscript file.

Pier Side

The telescope can be put on the east or west side of the pier. If your objects are rising, then the telescope is better on the west side of the pier, while if your objects are setting, the telescope is generally best on the east side of the pier. If you are unsure on which side to have the telescope, we suggest that you look at the safety map (430kb postscript file).

Slits (Aperture Wheel)

The following slits are available for use with DFOSC: 1.0, 1.5, 2.0, 2.5, 5.0, and 10.0 arcseconds. These slits have a length greater than the DFOSC field. In addition to these, echelle slits are available with widths of 1.0, 1.5, and 5.0 arcseconds, and lengths of 12.5, 11.0, and 12.0 arcseconds respectively.

Filters (Filter Wheel)

The basic set of image quality filters is listed below. These filters have diameters of 60mm and will vignet the field when used in the FASU. Interference filters must be put in the FASU (see the manual for an explanation). Other 60mm filters from the IQ filter list can also be used. Consult the IQ filter list within MIDAS (use the command create/gui filters).

Grisms (Grism Wheel)

The available grisms are listed below. Grisms 10, 11, and 12 are normally used as cross dispersers, though other grisms can be used for this purpose. A grism used as a cross disperser must go in the DFOSC filter wheel.

Adaptor Lamps

He and Ne lamps are permanently mounted in the sky baffle and are used by most observers. The adapter has two positions in which line lamps can be mounted. In position 2 it is possible to mount a He, Ne, or Ar lamp, and in position 3 can be mounted a Th, Cu(Ar-He), Cu(Ar-Ne), or Fe(Ar-Ne-He) lamp. We recommend that the line lamps in the adapter only be used for echelle spectroscopy. Please fill in your requirements below.