Prefixes for input of spatial positions
When specifying spatial coordinates, the following prefixes can be used:
* for RA or DEC in resp. HMS and DMS in EPOCH of set
*1950 for RA or DEC in resp. HMS and DMS in EPOCH 1950.0
*xxxx.x for RA or DEC in resp. HMS and DMS in EPOCH xxxx.x
G Galactic longitude or latitude in degrees
E Ecliptic longitude or latitude in degrees
S Supergalactic longitude or latitude in degrees
Examples:
- POS= * 10 12 8 * -67 8 9.6
- RA = 10 hours, 12 minutes, 8 seconds, DEC = -67 degrees, 8 minutes,
9.6 seconds, in a
2-dimensional area and in the epoch as found in the desciptor of the set.
- POS= *2000.0 3 14 38.02 *2000.0 41 13 54.84
- Input of RA 3 h 14 m 38.02 s, DEC 41 d 13 m 54.84 s in epoch 2000.0
- BOX= G 56.7 G 9.89 D 12 ARCSEC 10 ARCSEC
- Input of a box centered at 56.7 degrees galactic longitude and 9.89
degrees latitude with size 12x10 seconds of arc.