sdbaseline – Fit/subtract a spectral baseline – single dish task

Description

Task sdbaseline performs baseline fitting/removal for single-dish spectra. The fit parameters, terms and rms of base-line are saved to an ascii file, ‘<outfile>_blparam.txt’.

Parameters

Title
Parameter	Default	Description
infile	`''`
antenna	`int(0)`
fluxunit	`''`	units of the flux ['K' or 'Jy'] (''=current)
telescopeparam	`''`
field	`''`
spw	`''`
restfreq	`''`
frame	`''`	frequency reference frame ['LSRK', 'TOPO', 'LSRD', 'BARY', 'GALACTO', 'LGROUP', or 'CMB'] (''=current)
doppler	`''`	doppler convention ['RADIO', 'OPTICAL', 'Z', 'BETA', or 'GAMMA'] (''=current)
timerange	`''`
scan	`''`
pol	`''`
tau	`float(0.0)`
maskmode	`''`	mode of setting additional channel masks ['auto', 'list', or 'interact']
thresh	`float(5.0)`
avg_limit	`int(4)`
edge	`numpy.array( [ int(0) ] )`
blfunc	`'poly'`	baseline model function ['poly', 'chebyshev', 'cspline', or 'sinusoid'
order	`int(5)`
npiece	`int(2)`
applyfft	`True`
fftmethod	`'fft'`	method for automatically set wave numbers of sinusoids ['fft']
fftthresh	`float(3.0)`
addwn	`UNKNOWN`
rejwn	`UNKNOWN`
clipthresh	`float(3.0)`
clipniter	`int(0)`
verify	`False`	interactively verify the results of operation for each spectrum [True, False] (see description in help)
verbose	`True`	output fitting results to logger [True, False]
bloutput	`True`	output fitting results to a text file [True, False]
blformat	`''`	format of the text file specified with bloutput ['' or 'csv']
showprogress	`True`	show progress status for large data [True, False]
minnrow	`int(1000)`
outfile	`''`
outform	`'ASAP'`	output file format ['ASAP', 'MS2', 'ASCII', or 'SDFITS']
overwrite	`False`	overwrite the output file if already exists [True, False]
plotlevel	`int(0)`

Parameter Explanations

infile

''

name of input SD dataset

antenna

int(0)

select an antenna name or ID, e.g. 'PM03' (only effective for MS input)

fluxunit

''

units of the flux (''=current)

telescopeparam

''

parameters of telescope for flux conversion (see examples in help)

field

''

select data by field IDs and names, e.g. '3C2*' (''=all)

spw

''

select data by IF IDs (spectral windows), e.g. '3,5,7' (''=all)

restfreq

''

the rest frequency, e.g. '1.41GHz' (default unit: Hz) (see examples in help)

frame

''

frequency reference frame (''=current)

doppler

''

doppler convention (''=current). Effective only when spw selection is in velocity unit.

timerange

''

select data by time range, e.g. '09:14:0~09:54:0' (''=all) (see examples in help)

scan

''

select data by scan numbers, e.g. '21~23' (''=all)

pol

''

select data by polarization IDs, e.g. '0,1' (''=all)

tau

float(0.0)

the zenith atmospheric optical depth for correction

maskmode

''

mode of setting additional channel masks

thresh

float(5.0)

S/N threshold for linefinder

avg_limit

int(4)

channel averaging for broad lines

edge

numpy.array( [ int(0) ] )

channels to drop at beginning and end of spectrum

blfunc

'poly'

baseline model function

order

int(5)

order of baseline model function

npiece

int(2)

number of element polynomials for cubic spline curve

applyfft

True

automatically set wave numbers of sinusoids

fftmethod

'fft'

method for automatically set wave numbers of sinusoids

fftthresh

float(3.0)

threshold to select wave numbers of sinusoids

addwn

*UNKNOWN*

additional wave numbers to use

rejwn

*UNKNOWN*

wave numbers NOT to use

clipthresh

float(3.0)

clipping threshold for iterative fitting

clipniter

int(0)

maximum iteration number for iterative fitting

verify

False

interactively verify the results of operation for each spectrum (see description in help)

verbose

True

output fitting results to logger

bloutput

True

output fitting results to a text file

blformat

''

format of the text file specified with bloutput

showprogress

True

show progress status for large data

minnrow

int(1000)

minimum number of input spectra to show progress status

outfile

''

name of output file (See a WARNING in help)

outform

'ASAP'

output file format (See a WARNING in help)

overwrite

False

overwrite the output file if already exists

plotlevel

int(0)

control for plotting of results (see examples in help)