| Chandra X-ray Center | 	PI: Dr. CXC Calibration  | 
| Parameter | Value | Description | 
|---|---|---|
| ASCDSVER | 7.6.8 | ASCDS version number | 
| DATE | 2006-06-30T09:58:09 | Date and time of file creation | 
| DATE-OBS | 2003-11-09T09:16:50 | Observation start date | 
| DATE-END | 2003-11-09T12:21:46 | Observation end date | 
| RA_PNT | 278.35716425022 | Pointing RA | 
| DEC_PNT | -10.623107012603 | Pointing Dec | 
| ROLL_PNT | 283.34160447887 | Pointing Roll | 
| RA_TARG | 278.389583 | Observer's specified target RA | 
| DEC_TARG | -10.568528 | Observer's specified target Dec | 
| DATAMODE | VFAINT | Data mode | 
| READMODE | TIMED | Read mode | 
| FP_TEMP | 153.4460144 | Focal Plane Temperature [K] | 
| FSW_VERS | 30 | ACIS flight software version number | 
| Parameter | Value | Description | 
|---|---|---|
| ASCDSVER | 7.6.8 | ASCDS version number | 
| DATE | 2006-06-30T10:17:28 | Date and time of file creation | 
| DATE-OBS | 2003-11-09T09:16:50 | Observation start date | 
| DATE-END | 2003-11-09T12:21:46 | Observation end date | 
| INSTRUME | ACIS | Instrument | 
| DETNAM | ACIS-012367 | Detector | 
| GRATING | NONE | Grating | 
| OBJECT | G21.5-0.9[Chip I3, T=120, Offsets=-2.5,2.5,0] | Source name | 
| TITLE | AO4B OBSERVATIONS OF THE STANDARD CANDLES CAS A AND G21.5-09 | Propo | 
| OBSERVER | Dr. CXC Calibration | Principal investigator | 
| OBS_ID | 3699 | Observation id | 
| SEQ_NUM | 590311 | Sequence number | 
| RA_NOM | 278.35716425022 | Nominal RA | 
| DEC_NOM | -10.623107012603 | Nominal Dec | 
| ROLL_NOM | 283.34160447887 | Nominal Roll |