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Bolometer's Observation

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 Pako is cASe-SenSiTIve for the source names.

Skydip, pointing, skydip

Pako> bt !Skydip at the current azimuth+start

Every 2 hours in stable atmospheric condition.

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 BR Pako> start ! Start 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). 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> start !Start the map after you checked it is correct (it gives you the total integration time).

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> bt                        !skydip
Pako> p60
Pako> set pointing 2. -6.
Pako> focus 1.1
Pako> start
Pako> set focus -3.5
Pako> onf4                      ! Measure the flux of Mars

Pako> gain 10.
Pako> @wbolo
Pako> set project 175_05   
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 ... 

The set project Proj_Id will be necessary until it is automatically included in the source catalog.

Heterodyne Observation

Heterodyne observations are more complex in the sense there is much more options available. Since the NCS/Pako are still under heavy development, we give here a typical session. Some commands are the same that with bolometer observations. If the macros written by the PIs are not working ask the Pool coordinator or the AoD.

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 ...