<> <> Back to Pool page: PoolObserving '''''Important: these notes are specific for observation in the Pool -- they are not the general Pako Cookbook!''''' (!) '''IMPORTANT: The bolometer is refill once every ~2 days and then backup-heterodyne projects will be observed for about 5 hours or until the bolometer temperature is cooled down - This is independent of atmospheric conditions''' = Bolometer Observation = Currently we are using the 117 channels MAMBO2 bolometer built at the MPfR in Bonn (Germany) by the group of Ernst Kreysa. The most important commands of the old system have been adapted to the NCS. Here is a typical starting sequence for the bolometer. == Setup the Bolometer == Pako> '''@wbolo''' !'' Mambo2, central pixel 53, short onoff (onf4), setup the bolometer commands'' == Sources Catalog == Pako> '''catalog source pool''' ! ''Setup the project source catalog'' <
> Pako> '''catalog source ihet''' ! ''Setup the pointing/calibration source catalog'' Pointing sources: '''J1419+240''' not 1419+240. <
> == Skydip, pointing, focus == Pako>'''bt''' !''Skydip at the current azimuth+start going down from high to low elevation'' '''Do NOT use at present:''' {{{ '''From Pako version 1.0.10 onwards we can also do skydips in continuus slew motion.''' Pako> '''btslewu''' !''Skydip at the current azimuth+start going up from low (~15º or 3.5 airmass) to high (~65º or 1.1 airmass) elevation'' [[BR]] Pako> '''btslewd''' !''Skydip at the current azimuth+start going down from high (~65º or 1.1 airmass) to low (~15º or 3.5 airmass) elevation'' }}} (!) Every 2 hours in stable atmospheric condition. '''NOTE: For NCS testing use p90 or p120 for pointing'''<
> Pako> '''p40''' !''Short pointing for weak sources+start'' <
> Pako> '''p60''' !''Long pointing for strong sources+start'' <
> Pako> '''set pointing azcor elcor''' !''Correct the pointing with azcor and elcor. Correction from MOPSIC (@p or @psn for weak source)'' Pako> '''bf''' ''Perform the focus'' <
> Pako> '''set focus sfcz''' !''Correct the focus with sfcz. Correction from MOPSIC (@f or @fsn for weak sources)'' <
> (!) Do a focus when atmospheric conditions are changing, typically after sunset/sunrise Before an Onoff, be sure you are pointing with the right pixel (20).<
> Do a pointing before each Onoff or map if they are longer than 30 mn. [[CookbookPako#top|Top]] == Calibration == Calibration on a [primary|secondary] calibrator Pako> '''catalog source ihet''' <
> Pako> '''source Calibrator_Name ''' <
> Pako> '''p60''' <
> Pako> '''set pointing azcor elcor''' <
> Pako> '''onf4''' ! Short Onoff integration (4 Subscans of 10 s) with central pixel 53 You may do a short ''onf4'' after a normal pointing to monitor the pointing source flux. == Onoff and Map == Pako>'''onf 20 30''' !''Perform an on-off integration of '''20''' subscans of 60s with a wobbler throw of '''30"''' '' <
> Pako> '''@onf30''' !''Some project may have their own on-off macro'' Don't try to make very long integration, you may loose the complete scan. In such a case use a loop. Pako> '''bsw throw''' !''Setup the wobbler throw'' <
> Pako> '''bmap laz lel elstep azv''' !''Setup an OTF map of laz azimuth length, lel elevation length, elstep elevation step and azv azimuth speed (arcsec/s).'' <
> Pako> '''bmapskew laz lel elstep azv skew''' !''Setup an OTF map of laz azimuth length, lel elevation length, elstep elevation step, azv azimuth speed (arcsec/s) and a skew (step) in azimuth (arcsec).'' <
> Pako> start !''Start the map after you checked it is correct (it gives you the total integration time).'' You should consider doing a pointing before AND after the map to check the tracking during the map. ''Maps with the wobbler rotated'' [between -60 and 60 degrees]:<
> Pako> '''set 2nd wobblerRotation''' !''Setup the wobbler rotation with the angle wobblerRotation [degree]'' <
> Pako> ... Do a pointing before with the wobbler rotated <
> Pako> '''bmap-rotate laz lel elstep azv wobblerRotation''' !'' Setup an OTF map of laz azimuth length, lel elevation length, elstep elevation step, azv azimuth speed (arcsec/s) and the wobblerRotation angle [degree]'' <
> Pako> start <
> Pako> ... Do a pointing after the map Pako> '''set 2nd 0.''' !''Setup the wobbler rotation back to zero.'' The speed should not be larger than ~8 arcsec/sec NOTE: <
> '''roff20''' : set the pixel 20 for on-off (most sensitive one). <
> '''roff53''' : set the central pixel 53 (default with @wbolo) <
> <
> [[CookbookPako#top|Top]] == Typical Bolo Session == A typical starting session could be as following: {{{ Pako> @wbolo Pako> source Mars Pako> gain 2 ! special case for Mars, normal gain is 10 Pako> p60 Pako> set pointing x y Pako> bt !skydip Pako> p60 Pako> set pointing 2. -6. ! From @psn in the mopsic monitor, ask AoD. Pako> bf ! focus Pako> set focus -3.5 ! From @fsn in the mopsic monitor, ask AoD. Pako> onf4 ! Measure the flux of Mars or the calibrator. Pako> gain 10. Pako> catalog source ihet Pako> source J0854+201 ! Pointing source Pako> roff20 ! Most sensitive pixel, used for onoff observations. Pixel 53 is the central pixel and used for maps Pako> p40 Pako> set pointing 0.4 -6.4 ! From @psn in the mopsic monitor, ask AoD. Pako> onf4 ! Why not ? Pako> catalog source pool Pako> source 0927+2001 !Project source Pako> onf 20 35 ! Do an on-off integration of 20 subscans of 60s ! with a wobbler throw of 35¨. Pako> Ad Nauseam ... }}} [[CookbookPako#top|Top]] == List of Commands == These commands are specific of the Pool observations with the bolometer. || Command || Description || || '''@wbolo''' || Setup the default configuration and the commands. || || '''bf''' || Perform a focus. || || '''bmap''' ''Az'' ''El'' ''Elstep'' ''Azvel'' || Perform an OTF map with an extent ''Az'' x ''El'' (arcsec), an elevation step ''Elstep'' (arcsec) and a scan velocity ''Azvel'' (arcsec/s) || || '''bmapskew''' ''Az'' ''El'' ''Elstep'' ''Azvel'' ''Skew'' || Perform an OTF map with an extent ''Az'' x ''El'' (arcsec), an elevation step ''Elstep'' (arcsec), a scan velocity ''Azvel'' (arcsec/s) and a skew in azimuth of ''Skew'' (arcsec) || || '''bmap-rotated''' ''Az'' ''El'' ''Elstep'' ''Azvel'' ''wobblerRotation'' || Perform an OTF map along the direction of the wobbler throw with an extent ''Az'' x ''El'' (arcsec), an elevation step ''Elstep'' (arcsec), a scan velocity ''Azvel'' (arcsec/s) and a wobbler rotated of ''wobblerRotation'' (degree). <
> '''You must notify the operator before using the rotator''' || || '''bsw''' ''Throw'' || Setup the wobbler ''Throw'' (arcsec). || || '''bt''' || Perform a bolotip at the current azimuth. || || '''btaz''' ''Az'' || Perform a bolotip at the azimuth ''Az''. || || '''gain'''''Val'' || Setup the bolometer gain at ''Val'': use ''gain 10'' for all but ''2'' for Mars, Mercury (Venus, Saturn, Jupiter). || || '''onf4''' || Quick 1 minute onoff on a strong source (calibrator). || || '''onf''' ''Nsub'' ''Throw'' || Perform an onoff of ''Nsub'' subscans of 1 minute with a wobbler ''Throw'' (arcsec). || || '''p40''' || Perform a pointing (40 arcsec) on a week source. || || '''p60''' || Perform a pointing (60 arcsec) on a strong source. To be preferred || || '''roff20''' || Set the reference channel 20, the most sensitive on ''MAMBO2'' (onoff). || || '''roff53''' || Set the reference channel 53, the central one on ''MAMBO2'' (mapping). || = Heterodyne Observation = == Pako scripts == * To setup the SIS project (PI, ProjID, Receiver, Catalogues) : [[attachment:setup-xxx_xx.pako]] * To setup the backends: [[attachment:backends-xxx_xx.pako]] * To setup a wobbler-switching procedure: [[attachment:target-wsw-xxx_xx.pako]] * To setup a position-switching procedure: [[attachment:target-psw-xxx_xx.pako]] * To setup a frequency-switching procedure: [[attachment:target-fsw-xxx_xx.pako]] * Here is a model of the line catalog, use a specific name for your project: [[attachment:model.lin]] '''VESPA''': Note that by default the receivers are in '''wide''' mode, except the 3mm receivers. The sky frequency that you specify appears at 598MHz in the IF which is close to the upper limit of VESPA. The receivers should be configured in '''narrow''' mode for VESPA for normal observations. == Typical observing session A typical observing session: {{{ Pako> @setup-186_05-1850 ! Setup the frequencies/receivers. Tuning... Pako> source Mars Pako> pointing ! Check if continuum backends are set Pako> start Pako> set pointing -1. 2. ! The correction are given using the mira program Pako> focus 2.0 Pako> start Pako> set focus -2.2 ! The correction is given using the mira program Pako> cata source ihet Pako> source J2240+245 ! Pointing source Pako> pointing Pako> start Pako> set point -1. 0.5 Pako> catalog source pool Pako> source N821 Pako> @backends-186_05 ! maybe included in the following macro Pako> @target-wsw-186_05 Number of Loops= 5 ! according the indications of the PI. Pako> @setup-186_05-1850 ! Setup the continuum backend. Pako> source J2240+245 Pako> pointing Pako> start Pako> set point -1. 0.5 Pako> catalog source pool Pako> source N822 Pako> @backends-186_05 Pako> @target-wsw-186_05 Number of Loops= 5 Pako> Ad Nauseam ... }}} [[CookbookPako#top|Top]]