Table 1: SOURCE: Source information
SOURCE: Source information
Data

Name

Format

Units

Measure

Comments

Columns

Key

SOURCE_ID

Int

Source id.

TIME

Double

s

EPOCH

Midpoint of time for which this set of parameters is accurate

INTERVAL

Double

s

Interval

SPECTRAL_WINDOW_ID

Int

Spectral Window id

Data description

NUM_LINES

Int

Number of spectral lines

NUM_EPOCH  

Int

Number of epochs for provided fluxes

NAME

String

Name of source as given during observations

(CATALOG)   

String

Catalog name

CALIBRATION_GROUP

Int

# 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

Proper motion

(TRANSITION) 

String(NUM_LINES)

Transition name

(REST_FREQUENCY) 

Double(NUM_LINES)

Hz

FREQUENCY

Line rest frequency

(SYSVEL) 

Double(NUM_LINES)

m/s

RADIAL VELOCITY

Systemic velocity at reference

(SOURCE_MODEL) 

TableRecord

Default csm

(DELTAVEL)   

double

m/s

Velocity resolution as required by the observer

(RANGEVEL)   

double(2)

m/s

Velocity range form observer (min,max)

( SOURCE_PARAMETER_ID)   

Int (NUM_EPOCH)

List of source parameter identifier(s)

( PULSAR_ID) 

Int

Pulsar id.


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 associated with the source and spectral window id. combination
NUM_EPOCH
Number of epochs for provided fluxes. Use 0 if the the source parameters are unknown.
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   or   with   for EQUINOX 2000 .
POSITION
Source position (x,y,z) at this TIME (for near-field objects)   with  
PROPER_MOTION
Source proper motion at this TIME   with   ?
TRANSITION
Transition names applicable for this spectral window (eg “v=1, J=1-0, SIO”)  ,   (USB)  ,   (LSB)
REST_FREQUENCY
Rest frequencies for the transitions  ,   (USB)  ,   (USB)
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.
PULSAR_ID
An index used in the PULSAR sub-table to define further pulsar-specific properties if the source is a pulsar.

Remark: SOURCE_IDbeing associated with a SPECTRAL_WINDOW_ID(unless SPECTRAL_WINDOW_ID= -1 for continuum experiments) SOURCE_PARAMETER_IDis intended only for parameters which are considered as useful in the frequency range of the spectral window.