SOURCE Source information.

Name

Format

Units

Measure

Comments

Columns

Key

SOURCE_ID

Int Source identifier

TIME

Double s EPOCH Time interval mid-point

INTERVAL

Double s Time interval

SPECTRAL_WINDOW_ID

Int Spectral window identifier

Data description

NUM_LINES

Int Number of spectral lines Nli

Data

SOURCE_NAME

String Name of source as given during observations

(CATALOG)

String Catalog name

CALIBRATION_GROUP

Int number grouping for calibration purpose

CODE

String Special characteristics of source. eg. Bandpass calibrator

DIRECTION

Double(2) rad DIRECTION Direction (eg. RA DEC)

(POSITION)

Double(3) m POSITION Position (eg for solar system objects)

PROPER_MOTION

Double(2) rad s-1 Proper motion

(TRANSITION)

String( Nli) Transition name

(REST_FREQUENCY)

Double( Nli) Hz FREQUENCY Line rest frequency

(SYSVEL)

Double( Nli) m s-1 RADIAL VELOCITY Systemic velocity at reference

(SOURCE_MODEL)

String Default csm

(DELTAVEL)

Double m s-1 Velocity resolution as required by the observer

(RANGEVEL)

Double(2) m s-1 Velocity range form observer (min,max)

( SOURCE_PARAMETER_ID)

Int Source parameter identifier

Notes: This table contains time-variable source information, optionnaly associated with a given FIELD_ID.
SOURCE_ID
Source identifier
TIME
Mid-point of the time interval over which the data in the row are valid. Require to use the same TIME Measure reference as in MAIN
INTERVAL
Time interval
SPECTRAL_WINDOW_ID
Spectral window identifier. A -1 indicates that the row is valid for all spectral windows
NUM_LINES
Number of spectral line transitions Nli associated with the source and spectral window id. combination
SOURCE_NAME
Source name, user specified.
CATALOG
Calalog name from which the source was extracted.
CALIBRATION_GROUP
Calibration group number to which this source belongs, user specified
CODE
Source code, used to describe any characteristics for the source, such as the nature of the calibrator.
Reserved keyword, including BANDPASS CAL1 .  
DIRECTION
Source direction at this TIME .
POSITION
Source position (x,y,z) at this TIME (for near-field objects)
PROPER_MOTION
Source proper motion at this TIME
TRANSITION
Transition names applicable for this spectral window (eg “v=1, J=1-0, SIO”)
REST_FREQUENCY
Rest frequencies for the transitions
SYSVEL
Systemic velocity for each transition    
DELTAVEL
Velocity resolution as required by the observer
RANGEVEL
Velocity range from observer (min,max)
SOURCE_MODEL
Reference to an assigned component source model table
SOURCE_PARAMETER_ID
Should be mandatory for sources used as flux calibrators.

Remark:
SOURCE_ID being associated with a SPECTRAL_WINDOW_ID (unless SPECTRAL_WINDOW_ID=-1 for continuum experiments) SOURCE_PARAMETER_ID is intended only for parameters which are considered as useful in the frequency range of the spectral window and its direction