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Contents
Contents
INTRODUCTION
OVERVIEW AND BACKGROUND INFORMATION
Overview
Some useful tips for new AIPS users
File system management and network use at the ATNF
File systems
How to use the network
BASIC CONCEPTS OF CALIBRATION FOR ATCA DATA
Antenna-based gain calibration
Stokes Parameters and Polarization
Should I calibrate in AIPS or MIRIAD ?
Do I really an offline secondary calibration at all ?
All about
XY
phase differences
LOADING YOUR ATCA DATA INTO AIPS
Data on Exabyte tape written with VMS
COPY
Loading the data directly from Exabyte tape into AIPS
Copying your data from Exabyte tape to disk
Data on 9-track tape written with VMS backup
Reading your data from disk into AIPS
How to use
ATLOD
Some Examples of using
ATLOD
Show and Tell
INITIALIZATION OF THE MULTI-SOURCE FILE
Sorting and Indexing
Summarizing the Observation
Setting the Flux Density Scale
Setting the Velocity Scale
AVERAGING DATA IN FREQUENCY AND TIME
Should I average my continuum data in frequency ?
How do I average my data in frequency ?
Spectral binning
Averaging in time
EDITING THE DATA
Averaged continuum (channel 0) data
Spectral (line or continuum) data
DETERMINING THE ANTENNA GAINS
What to do with spectral data
Computation
Should I scalar or vector average in the solution interval ?
Assessment and inspection of the gain solutions
Deleting SN tables
CORRECTING THE FLUX DENSITY SCALE OF SECONDARY CALIBRATORS
INTERPOLATION OF THE GAIN SOLUTIONS
General information
Computation
What to do with gain jumps
Assessment of calibration
Resetting the calibration
BANDPASS CALIBRATION FOR SPECTRAL DATA
General
Transfer of the calibration to the spectral data
Computation
APPLYING THE CALIBRATION TO THE VISIBILITIES
SPECTRAL-LINE SPECIFIC PROCESSING
General
Disk management
Continuum subtraction
Subtraction in the image domain by subtracting dirty images
Subtraction in the image and visibility domains combined
Subtraction in the visibility domain
Velocities and reference frames
Associating a velocity with a channel
Multi-source files
Single-source files
HOW TO COMBINE MULTI-CONFIGURATION DATA
Concatenation
A warning for users of NRAO AIPS
Conversion of single-source files to multi-source files
IMAGING
General
Imaging one channel and one
freqid
Sorting
Imaging
Imaging one channel and multiple
freqids
Imaging multiple channels
Imaging multiple
freqids
and multiple channels
Imaging spectral-line data
IMAGE RECONSTRUCTION (DECONVOLUTION)
Deconvolution with CLEAN
The Högbom CLEAN
The Clark CLEAN
The SDI CLEAN
The Cotton-Schwab CLEAN
Prussian helmets
Computation
Deconvolution with maximum entropy algorithms
Theory
Computation
Correcting for the Primary Beam
SELF CALIBRATION
General
Computation
AVAILABLE TASKS in AIPS
Tasks to Create uv Data Files
General Calibration Tasks
Editing/data Examination Tasks
Imaging and Deconvolution Tasks
Display Tasks
Analysis Tasks
Utility Tasks
DISCUSSION OF SOME SELECTED AIPS CALIBRATION ADVERBS
COMMONLY ENCOUNTERED TABLES IN AIPS
EFFECTS OF AVERAGING IN FREQUENCY AND TIME
Averaging in frequency
Averaging in time
Index
nkilleen@atnf.csiro.au