Page Last Updated : May 2 12:01
MMTCam - What's New March 2013A
Camera appears to generate a new emission line in Hectospec data at 8444A. Wrapping hasn't seemed to help. Power off USB extender - control via waveserv pmac? Actually single power relay for Apogee camera, filter wheel controller and USB fiber extender - power down also means "warm-up" of camera. Currently controlled from Telescope Operators WaveFront interface. (Open Issue)
Telescope motions are properly waited for in mosaic mode because this is built into the radecoffset command in the telescope server. Offsets will not be waited for in manual paddle mode - but are sufficiently fast that its probably not an issue. Don't expect this to be an issue - please notify if any motions visible
MMTCam Observing Guidelines
MMTCam Operating Manual
Ensure that the Apogee Camera is powered on. (operator station: WAVESERV Motion Control window -> Power -> Apogee)
If power is on but ICRON Ranger shows no link, verify that fibers are properly arranged on the patch panel.
Turn on the computer long. (long is on SAO internal net, accessible via clark and lewis).
Login to Long (windows mmtcam data acquistion computer)
xterm & vncviewer long -shared &Log in as User: "mmtcam". This Password for long vnc is in the drawer at MMT.
xgterm & su - mmtcam cl(this password on clark is the same as spec )
Run MMTCAM software
Connect to camera:
There are a couple of things that can cause the telescope to not connect:
Note: The camera, during testing, frequently seemed unwilling to go to the desired setpoint (-20C) and would instead display a window "Temperature Setpoint Revised". If this happens, wait a little and try setting the setpoint back.
Camera Settings: Camera Control Window -> 1) Expose tab -> 2) Options (little arrow) -> 3) Camera Settings
Note: If stuck in Guide tab getting Error pop-up "Enter value between -90 and 90": disconnect the telescope in the Observatory Control, zero out the Scope Dec in the Guide tab, and then re-connect with the telescope.
Note: Files are automatically saved in data directory /e/data/mmtcam/ with patched header cards for F5 compatibility.
Note: If file saving/transfering stops working (with messages of the form "timeout ## dopostproc-..."), CTRL-C out of mmtcam.go script, and restart. For other types of file-saving errors, it may still be necessary to close and re-launch Maxim from the start menu. Note that re-launching Maxim will result in 15-20 min of lost data until the thermal electric coolers stabilize.
Note: Files which were not successfully copied into /e/data/mmtcam may be recoverable from /e/tmp, however they will not have a proper F5 header.
Set up exposure sequence (Camera Control window -> Expose tab -> Autosave button):
Take exposures: Go back to the Camera Control window -> Expose tab -> click "Start."
For Telescope Operator:
Turn cooling off: Camera Control window -> Setup -> Coolers (area) -> Off
Close MaxIm DL.
MaximDL Options and Settings
The following items should be set automatically to the desired values, but here we document where they are in the MaximDL parameter entry dialogs:
The current MMTCam architecture requires that images be saved in a subdirectory of the E:\tmp directory so that they will automatically be queued for transmission to CfA. This is controlled by the first 3 menu items in the Autosave Setup window options menu. Set the path using "Set Image Save Path ...", then Check Auto-Subfolder and Check "New Subfolder at > Noon.
If the exposure delay is not set the date of the exposure is only saved to a precision of 1 sec. The value entry is located on the "Measure Shutter Latency" dialog box, reached from Camera Control > Expose Tab > Options > Measure Shutter Latency.
This value should be set to 1 hundredth of a second. Simply entry 1 in the hundredths box and press close to save the value.
In Maxim, click View->Observatory Control Window->Options(in Telescope box)->Setup (MMT TCS Setup): hacksaw.mmto.arizona.edu 5403
In Maxim, click View->Camera Control Window->Options(in Camera box)-> Setup the filters should appear in slots 1-5 as r,i,z,u,g
Target Schedule and Parameters
This will be prepared and submitted to the telescope operator the "normal way"
The MMTCam observations should appear in the hecto schedule and will provide the target name (which should match an entry in the observing catalog), exposure times, filter, etc.
The observer will also supply the desired dither information. Fields must be dithered to allow creation of a SuperFlat for data reductions. This appears to be the only viable option for creating a flat field for MMTCAM.
The dither instructions will (likely) consist of the size of the grid (e.g. 9 = 3x3 grid, 4 = 2x2 grid) and a dither step size. See "Dither Instructions" above for how to enable/configure dithering.
To allow the scheduler to update the bookkeeping each night, the new mmtcam software will override the MaximDL filename entered in the GUI with the Telescope Target name (aka Object, aka CAT-ID ) whenever a "Light" exposure is taken. Other exposure types (for the moment) will retain the MAXIM-DL name.
Starting Support Servers and GUIs
From the mmtcam GUI you have buttons to start these servers:
And the ability to start these F5 interfaces on clark
cd cl cl> imexam
By default mmtcam does not use lewis. However if you wish to do any ds9 and imexam type of operations on earlier images you may configure a workspace on lewis as mmtcam and do the following: