TRES observing notes September 2007 There are 9 fibers that exit the front end and go to the spectrograph, 3 each of small (1.4"), M (2.3"), and L (3.2"). For each set, there is a sky fiber, an object fiber, and a calibration fiber. The calibration fiber can be illuminated during a science exposure (continuous th-ar exposure) so that you have a simultaneous th-ar and target exposure. On the ccd, the calibration fiber data (th-ar lines) are effectively overlayed onto the sky fiber orders. The command f_total will flash on the th-ar lamp during the science exposure, automatically turning on the th-ar lamp for 300-sec during the exposure, centered on the exposure time. c_cex will take a calibration fiber comparison exposure. For normal sky/object data, use cexv and total commands. To take cal fiber calibration data: peri out (sky), shutter open (shuton). To take object/sky calibration data: peri in (comp), shutter open (shuton). To take object/sky science data: peri out (sky), shutter closed (shutoff) (to flash in th-ar through the cal fiber, th-ar on, shutter open). Scripts to take the afternoon calibration data: There is a script for each of the 3 primary observing modes. The scripts do not take bias frames, so take those manually for now ("bias 5" for each binning mode). The scripts are in /home/observer/scripts/ Source filename to run. dotresmedium2 medium fiber, binby2 (tested ok) dotressmall2 small fiber, binby2 (tested ok) dotressmall1 small fiber, binby1 (not tested!, may need to modify sleeps) Using the TRES guider: Setting up on a target and guide star is a multiple step process. The general steps are to first mark the fiber position, then a course centering of your target, selection of a guide star, and then fine centering of the target. To use the guider: Vncviewer into tres-guider:2. Launch a ds9 window (note this window will frequently crash and must be restarted before continuing with the guider commands.) If the ds9 window crahses while guiding, the guider will continue to guide ok. Currently there are 5 scripts to run for guiding setup (./01, ./02, etc). These scripts take arguments for fiber selection, guiding and setup integration times, and chopping interval. The scripts display help notes as they are run. It is possible to guide on either a field guide star or your target if there is no other guide star. If you guide on your target, the tip-tilt mirror will chop the star out of the fiber at a set interval to check the guiding position. As the tip-tilt mirror nears the end of it's travel, you will need to use the telescope handpaddle to move the star back to the center position. Scripts are located here: tres@tres-guider:~/TIP_TILT/GUIDE_LOOP/ ./01_focus.sh 1 (mark the fiber position) ./02_center_coarse.sh 0.1 (coarse center your target star) ./03_center_fine.sh 0.5 S (fine center target) ./04_setup_guiding.sh 0.1 S (select your guide star) ./05_self_guiding.sh 0.1 S 4 (start guiding, guiding on target itself) ./05_test.sh 0.5 S .5 (start guiding, including repeat of fine setup) ./05_guiding.sh 0.5 S (old guider code, do not use) For self guiding, tiptilt limits are 25% and 75%. For normal guiding, tiptilt limits are 5% and 95%. Edit the .offset file to tweak guide star position, but this should not be necessary with the latest guide code. Rotate your finding chart 270 to match the guide display (in the future roate guide display to put north at the top!) Misc Notes: The integrating sphere has it's own shutter, "shuton" and "shutoff" to control. Rotate your data files 270 to put blue at the top left. View /tdata/tres/2007.0926/.0099_guide.fits or .dat to inspect old guide info Mg B triplet is at ~1000, 1600 Gabor's favorite th-ar doublet is at 1827, 611 To focus the guide camera on the fiber: "./serial &" tres-guider/STEPPERS/./serial & pops up little controller window. "absmove=407" to set guide camera focus, default. Try 406 or 408. The ccd controller is run on tres-bench. If the ccd is hung, use the restart command: xterm -e ssh -l restart tres-bench.sao.arizona.edu Type "alias" in telshell to see avalable aliases.