OASIS daily checks

These checks should be performed with a flattened DM e.g. after simplexing with AG7.

Hot Links

• Introduction
  
• Take a Test Image
• Analyze the Test Image

Introduction

To get light onto OASIS you need:

• Select the 'OASIS obs' tab page within the combined INGRID/USP/OASIS Control GUI. Here select a spacial sampling (e.g. 0.26) and wait for completion followed by choosing the Spectral configuration (e.g. MR516). Again wait for completion.
  Finally select Exposure type IMAGING. With this you test all mechanisms inside OASIS.
• The NCU slide in Simplex position
• The Simplex lamp ON
• Simplex Iris set to -150
• Dichroic 50/50
• OASIS flat IN
• Simplex flat OUT
• Filter focus set for Simplex
• SG loop closed

WHT ULTRADAS startup for OASIS

1. Login to the observing system ICS computer (currently taurus) as: whtobs

The following two windows should then appear:
• The Observing System (pink) window. This is the window where observer's commands are entered.
• The DAS Terminal (yellow) window. This window contains a number of tab pages, each one corresponding to one of ING's DAS computers. This window facilitates the starting, stopping or reinitialising of the ULTRADAS camera servers.
2. Prior to starting any of the observing software OASIS needs to be configured for use in the observing system. In the Observing System (pink) window enter:

   obssys, followed by option 1

3. Review the cameras and instruments that are currently defined in the observing system. If necessary select:

   option c

   to edit the WHT configuration file (look on the CCD whiteboard to see which DAS machine is hosting the OASIS camera server and enable the appropriate entry in the configuration file.)

4. On completion of this step the Observing System (pink) window should display the following prompt:

   SYS@taurus>

5. Using the Combined Terminal (yellow) window select the tab page associated with the OASIS camera server. Type:

   obssys

   followed by option 1, then option 1 again. At the end of this configuration procedure you should receive a DASn prompt (where n refers to the das machine you are on).

6. Again, in the same window type: startobssys

   to load the ULTRADAS camera software, checking that no unusual error messages are emitted. Repeat steps 5-6 for any other cameras that have been defined in the observing system configuration.

7. At the Observing System (pink) window type:
startobssys

to start the main components of the observing system. During start-up various windows will be started. The important ones for OASIS are:

• Talker
• Observing Log
• ULTRADAS Camera Mimic (the new combined one)
• Who goes there ? (observer info)
• INGRID/USP/OASIS Control GUI
• Real Time Display Tool
• XIMTOOL Image Display Window (used for display of RTD images)
8. When the system prompt is returned, the observing system is ready for use. To avoid screen clutter, minimise the windows that are not being used.

Take Test Image

1. To take an image, enter at the prompt:

SYS@taurus> run OASIS 2

2. Wait until the ULTRADAS Camera mimic indicates that the detector has been read out and has been 100% processed. Make sure the images are written (with TCS header information) to the Observing Log.
3. Immediately after every readout, the Real Time Display Tool (RTD) will detect the new image file and load it to the XIMTOOL display window. You expect to see one spot close to the CCD centre.
4. Now take a bias to check the detector for noise:

Analyze the Test Image

1. Login on the WHT Data Reduction Sparc (whtdr) as: whtguest
2. Open the programs menu by clicking on the background and start an xgterm and ximtool session.
3. In the xgterm, start an IRAF session using the command: cl
4. Within IRAF, change to the obsdata directory where the images are being stored. This information can be found on the ULTRADAS Camera mimic. e.g.

cd /obsdata/whta/20051218

The obsdata discs currently being: whta, whtb, whtc, whtd & whte.
It should be noted that a new 'date' directory is generated at 12:00 UTC daily
5. To display an image, enter at the IRAF prompt: display rnnnnnn[1] 1 fill+
6. At the IRAF prompt, type: imexam
7. Check (using the r command) the FWHM of the run exposure and (using the m command) the bias level.
8. Exit imexam by typing: q (the cursor must be in the image area).

Document History

Click here for the WHT home page.

THIS FILE: http://www.ing.iac.es/~eng/ops/wht/oasis_checks.html