This section gives a very short and simple overview of the steps needed to start spectral line observations. Details and more explanations are in the following sections, also in user's guides for special topics.
The following simple example is for both polarizations of one sub band, LI or UO, of one band, E090, of the EMIR receiver, see the EMIR user's guide for more information.
W3OH EQ 2000 02:27:03.8812 +61:52:24.572 LSR -45.000
CS(2-1) 97.980968 LI 12CO(1-0) 115.271204 UO
LI and LO refer to sub bands of the EMIR E090 band. See the EMIR user's guide for details.
SIC PRIORITY 1 PAKO ! PAKO commands get precedence SET LEVEL 0 0 ! to get verbose chatter from pako SET Project 111-22 ! project ID (project number) SET PI "Dr. Lilo D. Doe" ! principal investigator SET Observer "John Doe" ! SET Operator Pako ! SET Topology low ! topology for azimuth SET doSubmit YES ! allow submission to Queue SHOW ! show parameters set with set
CATALOG line my.lin ! specify (your) line catalog RECEIVER /CLEAR ! clear any previous RX setup RECEIVER E090 12CO(1-0) /Horizontal /Vertical
The options /Horizontal /Vertical mean that both polarizations will be used.
CATALOG SOURCE my.sou ! select your source catalog SOURCE W3OH ! source W3OH from your catalog BACKEND /CLEAR ! clear any previous Backend setup BACKEND WILMA /default ! simple spectrometer setup for EMIR BACKEND 4MHz /default ! simple spectrometer setup for EMIR CALIBRATE /SKY NO ! doesn't need to move to sky position START ! start
CALIBRATE /DEFAULT ! default calibration START ! start
SOURCE 2251+158 /catalog iram-J2000.sou ! pointing source from catalog SOURCE Uranus ! OR: a ``small'' planet
BACKEND /CLEAR BACKEND BBC /Default
BACKEND BBC /Default connects one part of the continuuum backend BBC to each polarization and sideband of each selected EMIR band.
SWBEAM ! to select beam switching POINTING /default ! pointing START ! start
SET POINTING 3.4 -1.2
FOCUS 2.0 ! length [mm] START ! start
SET FOCUS -2.1
SOURCE W3OH ! source W3OH from your catalog BACKEND /CLEAR ! clear any previous Backend setup BACKEND WILMA /default ! simple spectrometer setup for EMIR BACKEND 4MHz /default ! simple spectrometer setup for EMIR CALIBRATE /DEFAULT ! default calibration START ! start
BACKEND WILMA /Default connects one part of the WILMA spectrometer to each EMIR sub band selected with RECEIVER. BACKEND 4MHz /Default connects one part of the WILMA spectrometer to 2 EMIR sub bands selected with RECEIVER. 4
SWWOBBLER -120.0 120.0 /TPHASE 2.0 ! wobbler -/+ 120 arc sec ! 2 seconds per phase ONOFF /NSUBSCANS 12 /SYMMETRIC /TSUBSCAN 30 ! 12 subscans ! "symmetric" subscan sequence ! 30 sec per subscans START
NOTES.
PAKO has built-in help for all commands, e. g.,
HELP SWWOBBLER HELP ONOFF /NSUBSCANS
Most commands can be abbreviated substantially, e. g., the following 2 are equivalent:
ON /NS 16 /SYM /TS 22 ONOFF /NSUBSCANS 16 /SYMMETRIC /TSUBSCAN 22
If you find that you enter the same command(s) very often, it is not necessary to type them every time! They can be put into command ``scripts'' either by editing a file or with PAKO's SAVE command, see section 2.