The POETS computer is turned on by pressing the silver button on
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1. Adjust the temperature by entering a value in C or moving the adjustment bar The cooler should be on and the box for on at program startup should be checked See Fig 5 for typical settings Temperature Control X Temperature Setting Cooler fe On Figure 5 Typical settings for the temperature control panel for POETS The minimum cooling depends on ambient C Ott temperature for reference at 68 F the i camera can cool to 60C Cancel t Help Cca He M Cooler On at program startup 9 To trigger the camera using the GPS SELECT all of the acquisition settings you desire CLICK on the camera icon to take data Next enter the GPS software and select POP lower right Set start time UT and repeat interval as desired The camera will sit until it receives the trigger at the POP time you set at which point frames will display in the software Important Note Again note that the GPS start time is NOT RECORDED anywhere other than when you type it into the GPS software The time in the FITS header will be that when the take data command was given in the Solis software 10 To close the software simply click File gt Close The camera fan may continue to run if the software is closed but the computer is still running It is best to shut down the entire system at the end of each night2. Enable Spooling File Type C Binan Sif Fis C Tiff Acquisition Size MB 1 Storage C RAM Disk Available RAM MB 1540 Compression P Available Disk Space MB 63070 File Name spool fits Location CAD oacuments and Settings End userMy Documents T El Format unsigned 16 bit integer J Open spooled data when complete V Use Append Settings from Autosave tab Note FITS data will not be post processed and will therefore not be affected by data type transformations or orientation settings V Update Display During Acquisition Cancel Setup Acquisition Parameters start Andor SOLIS for Imag Y Solis2 Paint vago 2 36pm andor sous for magina 207 lajxi File Acquisition Calibrate Command Hardware Window Help aalas 2 Setup Acquisition x Setup CCD Binning Auto Save Spooiing Image Orientation Video Mode Photon Counting Enable Auto Save File Type f Sif C Fits f Tiff File Stem fu ntitled sif Location p 7 Appen Date J Computer Name SUM ones Camera Type Time Pad Width Operator Unknown 3 z Separator Example Untitled 001 sif Cancel Setup Acquisition Parameters i start Andor SOLIS for Imag Y Solis3 Paint Uag 2 36PM Figure 4 Typical settings for data storage the Spooling and Auto save tabs 8 To change the cooling settings CLICK on the menu Hardware gt Temperature Control
3. to take a data cube containing the number of frames specified in the Solis software with each frame being triggered by a GPS repeat signal See 9 for sending GPS triggers Important note The camera software and GPS software do not communicate with one another Therefore you must hand record the start time of any images triggered via GPS b Note that the Shift speed is the time to shift electrons per CCD row Number selections listed in brackets will allow the data to read out even more quickly but are likely to incur some electron loss Readout rate allows selection of the amplifier 1 MHz Conventional amp Electron Multiplying EM 3 MHz Conventional amp EM 5 MHz EM or 10 MHz EM Faster readout rates incur higher read noise see the specification sheet for details Note that the EM modes can be run with EM disabled Usage of EM modes while disabled removes worry that the avalanche gain will be compromised however taking data in this mode or even with EM enabled at very very low EM values is inadvisable because the EM must be high enough to compensate for the higher read noise and excess noise factor in these modes Readout gain in e ADU is selected by choosing Pre amplifier gain See the specification sheet for values corresponding to the listed numbers The Number of prescans can be set to a non zero value if you would like to ensure that the first frame of every saved cube does not contain a
4. A BRIEF CAMERA SOFTWARE SOLIS USER GUIDE The POETS computer is turned on by pressing the silver button on its front A Windows XP desktop should appear automatically If for any reason you need to provide a password for the IRTF POETS account itis KBO_ occ IRTF The bold text below contains simple instructions for camera operation Note that the screenshots in Figs 2 5 are from an earlier version of the Solis software than that currently used at the IRTF and thus may be slightly different however the instructions here are valid A hard copy user manual is onsite which describes many other features 1 CLICK on the Andor iXon desktop shortcut icon to start the camera software Note that this icon should be near the Spectrum Inst TM 4 icon that is employed to monitor and send trigger signals from the GPS Other software shortcuts are provided on the desktop for usefulness but are not necessary to run the instrument 2 CONFIRM that the camera software starts and presents a screen like that shown in Figure 2 a Note that the camera S N should appear in the top bar This confirms that the software recognizes the camera b Note that a pre existing configuration file should be loaded automatically This will cause the camera to cool upon startup and ensure that the shutter is closed Uf you want to change the configuration file simply set software parameters to your choosing Then overwrite the cfg file listed under File gt Co
5. Y Solis1 Paint y aug Q 2 35PM Figure 3 Data acquisition settings for typical operation of the POETS camera 5 To preview data take and see frames without storing CLICK on the video camera icon labeled preview in Fig 3 The stop button labeled in Fug 3 will stop the preview 6 To take data CLICK on the camera icon labeled take data in Fig 3 The stop button labeled in Fug 3 will abort Important Note The configuration file is currently set to automatically spool save and incrementally number the data cubes See next item If you do not want to autospool and save you must change these settings With no spooling any image you take should display and then allow you the option to save and name 7 To spool and automatically name data GO TO the Setup Acquisition window and CLICK on the Spooling and or Auto Save tabs The typical settings for these are shown in Figs 4a amp b Spooling ensures that every frame is saved when taking a very large data cube this prevents total data loss should a mid cube crash occur When the Use Append Setting from Autosave tab is selected the spooled data are compiled into a data cube and named via the pattern selected in Auto save File Acquisition Calibrate Command Hardware Window Help laix S ma 2 J e ESE 2 Setup Acquisition x Setup CCD Binning AutoSave Spooling Image Orientation Video Mode Photon Counting
6. nfiguration Files c Note that the temperature display in at the lower left is red which indicates that the temperature has not stabilized That box will turn blue when the camera has stabilized at the set temperature fag Andor SOLIS for Imaging X 2171 la x Fie Acquisition Calibrate Command Hardware Window Help galala ea Autoscale Min Max 3 3 gt 510 510 Frame Transfer Counts 1MHz at 16 bit x2 4 Conventional I start andor SOLIS for Imag New Bitmap Image Win UGS 2 34pm Figure 2 Solis v 4 6 5 POETS camera software as it appears upon successful startup 3 To take data the shutter must be open CLICK Hardware gt Shutter Control and ensure that the Internal Shutter is set to permanently open For longer exposures a manual shutter setting could be used however this mode is not tested 4 To set data taking parameters CLICK on the white wrench icon denoted by an arrow in Fig 3 or use the Acquisition gt Setup Acquisition menu Typically the configuration file starts with the settings shown in Fig 3 The exposure time number of exposures and readout rate amplifier will be the selections that are usually altered between frames a Triggering should be Internal if you plan to take frames using the Solis software External Start if you plan to take a data cube containing the number of frames listed in the Solis software and starting at a GPS trigger External if you want the camera
7. ny residual signal Note that prescans have not been used with occultation or other time specific observations We typically drop the first data frame during analysis Ensure that the Frame Transfer box is checked The camera has not been tested in non frame transfer modes Note that frames fits or otherwise can be opened in either the Solis software under the File menu or in ds9 Note that the WinScp icon on the desktop is a user friendly interface for transferring files between POETS and stefan or other remote servers Preview Take Data Stop Taking Data l Data Acquisition Settings e galal wase maea Setup Acquisition O x Setup CCD Binning Auto Save Spooling Image Orientation Video Mode Photon Counting Acquisition Mode Triggering Readout Mode Kinetic Internal b Image Timings Vertical Pixel Shift Exposure Time secs 0 28557 3 4806 Hz Shift Speed usecs 33 z Vertical Clock Normal Voltage amp rantitiide Horizontal Pixel Shift Kinetic Series Length fi 27a Readout Rate 1MHz at 16 bit Pre Amplifier Gain 24 ind Number of prescans fo i Output Amplifier Electron Multiplying V Frame Transfer Conventional M Isolated Crop Mode Note Exposure Time Fire pulse length Baseline Electron Multiplier EM Gain Baseline Clamp B Advanced Baseline Offset counts 0 si Cancel Setup Acquisition Parameters g Start Andor SOLIS for Imag
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