Science

For useful commands: Making offsets using Markers on the cameras

For most recent positions: Current best position for markers (CWFS,IHMP, etc.)

Setup

1) The RA will inform you they have sent a target. On the far right jove terminal, on the TCS GUI, in the trajectory tab, you will find a button labeled “Go Next”. Confirm the target in the next trajectory column is correct with the RA. This is the next target. They will also send over either coordinates or a finder chart on nosy/noss/htopx2/acam. Make sure you have a tab open that is easy for you to find with this webpage on it.

2) Check the boxes for Dome and Structure and Probes then click Go Next. You should hear the structure lift and see the dome start to move on the CCAM. If the RA does not want the probes box checked, they will inform you to not have the box selected.

3) While the trajectory is getting ready to start you could use this time to make sure that you have the correct markers set in each camera. The marker locations for each camera can be located https://het.as.utexas.edu:8001/trac/WFUCommissioning/wiki/HetProcedures/RA/markers. Set up in the ACAM and Tip/tilt cameras first so that you are semi-ready to guide when the trajectory begins. This is also a good time to make sure the ACAM is deployed and ready for use. For each of the cameras you will need to click start pipeline and start images before you will get any images back from them.

4) You will also have either coordinates or a finder chart sent to you from the RA on nossy/noss/htopx2/_totemp.html. Make sure you have a tab open that is easy for you to find with this webpage on it. This information is important for you to get the target on trajectory.

5) Once the command for the trajectory turns green in the command status box on the TCS Gui and the ACAM is steady and no longer changing you can start closed loop guiding on the Tip-tilt camera at the X,Y pixel coordinates designated by the Wiki. To do this click activate loop on the Tip-Tilt camera window.

6) Obtain rough focus on the ACAM (~0.1 mm). Focus is adjusted via the offsets section under the trajectory tab of the TCS Gui. Large offsets can be made in steps up to 0.5mm, but try not to move the tracker in steps larger than that, it can fault the tracker out. Once you get better focus you can do smaller focus steps of 0.05mm or less.

7) Go to your finder web page and check for setup information from the RA. If they have special requests (Which guide camera or which fiber) they will inform you.

8) Offset target to position on the ACAM https://het.as.utexas.edu:8001/trac/WFUCommissioning/wiki/HetProcedures/TO/MarkerOffset

9) At this point, how you set up is dependent on which instrument you are using. Below are instrument specific set up guidelines.

LRS2

1) Start Guiding (start loop and activate loop) on the ACAM to get the target centered on the correct instrument (coordinates sent from RA). To start guiding on the ACAM you will need to click start loop and activate loop after a fiducial and guide region have been set. Start pipeline and start images on the guider to prepare for guiding on the guide probe.

2) Once guiding on ACAM, offset both of the guide probe to center the guide star in the field. The center of the field of each guider is found on the best offsets page https://het.as.utexas.edu:8001/trac/WFUCommissioning/wiki/HetProcedures/RA/markers. Focus on the Guide probe should now be focused to within ~0.05mm of best focus.

3) If the star on the ACAM is positioned and steady at the correct pixel coordinates then make and set a guide box on the guide probe and hit start loop. After the image refreshes you will see a red cross mark on the guide cam, that is your new fiducial. At this point you can deactivate loop and stop loop on the ACAM and start loop and activate loop on the guide probe.

4) Save an ACAM image once you are guiding on one of your guide cameras to record the location you set up on. Once this is done you can stop the pipeline on ACAM and hit the setup complete button on the ACAM GUI.

5) Whichever guide camera you are not guiding on, check to make sure that it has the filter g selected and that is has metrology running. Start saving images on both of the guides cameras.

6) Now you can hand over control to the RA so they may begin any exposures they wish to take. Focus should be kept on the Guide probe during this time if you are not using a wave front sensor. Ideally, your set up time will be less than 10 minutes. The goal to aim for is 8 minutes. Not every time will be under 10, as some targets are more difficult than others or the RA has a special request. Your set up time is taken into consideration during performance reviews, so make sure you find a good balance between quick set up times and accurate pointing.

7) Depending on the exposure you may be using one of the wave front sensors. There are two of them, like the guider cameras, and they are abbreviated as WFS1 and WFS2. The RA will take care of centering up the WFS and when ready they will close the loop. When this occurs, you no longer have to worry about focus. However, it is still important that you check on the status of the WFS every couple of minutes to make sure they are making logical corretions.

Note: The set up for LRS2 should take ideally 8 minutes, and no longer than 10 minutes.

VIRUS

1) Once you have made a telescope offset in ACAM to the correct coordinates, check the guiders to see if they have any stars within them. If they do, choose which camera you wish to guide on and have the guider drag the star into the center by closing the metrology loop. To do this, the center fiducial marker must be set and a guide box must be set.

Note: The fiducial for the center of the guide camera is the center of the fiber bundle. The coordinates for this can be found on the wiki page for the best marker positions. (link).

2) Once the star is centered and the camera is guiding, save an ACAM image.

3) Start saving images on both of the guide cameras. Make sure that the guide camera that is not guiding is open loop and on filter g.

4) Once everything is set up and ready to go, hit the set up complete button.

5) Depending on the exposure you may be using one of the wave front sensors. There are two of them, like the guider cameras, and they are abbreviated as WFS1 and WFS2. The RA will take care of centering up the WFS and when ready they will tell you to close the loop. When this occurs, you no longer have to worry about focus. However, it is still important that you check on the status of the WFS every few minutes make sure they are making logical adjustments.

Note: The set up for VIRUS should ideally take around 5 minutes and no longer then 8 minutes.

HPF

Possible script shortcut to setting up with the regular mode on the HR fiber for HPF =

• Send the target from shuffle using either the IFU id 600 for regular setup or IFU id 603 for direct setups.
• make sure the pfip shutter is open
• open a connection to htcs in an xterm or console window
• in the htcs window as the structure sets down run the script ./regularhpfsetup or ./directhpfsetup
• follow the steps as prompted
• in the htcs window when the regularhpfsetup concludes run either ./guider1setup or ./guider2setup
• tell the RA when done so they can start the exposure.

The step by step details

Setting up for an HPF target follows the following procedures:

• use target_setup and either IFU 600 (normal setup) or 603 (direct setup)
  • Example target_setup 1183 E -to -ifu 600
• Change the acam filter to icd to /home/hpf/HPFics
• Change the guider guide probe to i
• Change the metrology guide probe to g
• Offset to the correct position on the ACAM based on the current best positions marker positions.
• Save an ACAM image.
• open the PFIP shutter
• retract ACAM and turn off the ACAM pipeline
• start guiding on the correct position on the HPFACAM based on the current best positions marker positions.

NOTE: If you have trouble getting the star to stay on the HPFACAM try increasing the integral term on the PID loop syscmd -T 'HPF_ACQ_tune(kd=0,ki=0.07,kp=1)' if you want to set it back to default syscmd -T 'HPF_ACQ_tune(kd=0,ki=0,kp=1)' to see the current values do syscmd -T 'HPF_ACQ_get_tuning()'

• Center the guide star in the desired guider probe (gc1 or gc2)
• Offset the desired guider probe by the correct amount based on the desired target science fiber: HE offsets or HR offsets
• Do handshake from HPFACAM to the guider
• Offset the fiducial by the correct amount based on the desired target science fiber: HE offsets or HR offsets
• start HPF exposure

HPF offsets to fibers

HPF HR mode

• syscmd -T 'Guider1_offset_probe (dx_ang=5,dy_ang=4)'
• syscmd -T 'Guider1_offset_fiducial (dx_asec=-9.9,dy_asec=-5.2,compensate="true")'

OR

• syscmd -T 'Guider2_offset_probe (dx_ang=5,dy_ang=4)'
• syscmd -T 'Guider2_offset_fiducial (dx_asec=-9.9,dy_asec=-5.2,compensate="true")'

Blind offsets from ACAM without using HPFACQ in the HR mode

Run shuffle with the fiber ID of 603 instead of 600. Use the HPF_HRfiber position to setup on in the ACAM. If there is uncertainty about the position then measure it at the end of a regular HPF setup to confirm the position. Do the handshake from the ACAM to the best guider choice. pull out the ACAM and start the science exposure.