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(!) '''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''' |
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| Pako> '''bt''' !''Skydip at the current azimuth+start'' | Pako>'''bt''' !''Skydip at the current azimuth+start going down from high to low elevation'' '''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'' |
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| Pako> gain 2 ! special case for Mars, normal gain is 10 | Pako> gain 2 ! special case for Mars, normal gain is 10 |
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| || '''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). || | || '''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). [[BR]] '''You must notify the operator before using the rotator''' || |
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| == Pako scripts == |
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| == Typical observing session |
Anchor(top) TableOfContents(3)
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 BR Pako> catalog source ihet ! Setup the pointing/calibration source catalog
Pointing sources: J1419+240 not 1419+240. BR
Skydip, pointing, focus
Pako>bt !Skydip at the current azimuth+start going down from high to low elevation
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 pointingBR Pako> p40 !Short pointing for weak sources+start BR Pako> p60 !Long pointing for strong sources+start BR 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 BR Pako> set focus sfcz !Correct the focus with sfcz. Correction from MOPSIC (@f or @fsn for weak sources) BR 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).BR Do a pointing before each Onoff or map if they are longer than 30 mn.
Calibration
Calibration on a [primary|secondary] calibrator
Pako> catalog source ihet BR Pako> source Calibrator_Name BR Pako> p60 BR Pako> set pointing azcor elcor BR 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" BR 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 BR 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). BR 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). BR 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]:BR
This feature needs special privilege for Pako. Ask the AoD. BR
Pako> set 2nd wobblerRotation !Setup the wobbler rotation with the angle wobblerRotation [degree] BR Pako> ... Do a pointing before with the wobbler rotated BR 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] BR Pako> start BR 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: BR roff20 : set the pixel 20 for on-off (most sensitive one). BR roff53 : set the central pixel 53 (default with @wbolo) BR BR
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.
Pako> bf ! focus
Pako> set focus -3.5
Pako> onf4 ! Measure the flux of Mars
Pako> gain 10.
Pako> catalog source ihet
Pako> source J0854+201 ! Pointing source
Pako> roff20
Pako> p40
Pako> set pointing 0.4 -6.4
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 ...
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). BR 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. |
gainVal |
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. |
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 ...