| Chandra X-ray Center | 	PI: Ms. Chiara Ferrari  | 
| Parameter | Value | Description | 
|---|---|---|
| ASCDSVER | 7.6.7.2 | ASCDS version number | 
| DATE | 2006-04-25T01:37:39 | Date and time of file creation | 
| DATE-OBS | 2004-08-20T15:22:34 | Observation start date | 
| DATE-END | 2004-08-21T00:09:56 | Observation end date | 
| RA_PNT | 342.52309430712 | Pointing RA | 
| DEC_PNT | -64.365861295084 | Pointing Dec | 
| ROLL_PNT | 15.585480237096 | Pointing Roll | 
| RA_TARG | 342.5125 | Observer's specified target RA | 
| DEC_TARG | -64.365278 | Observer's specified target Dec | 
| DATAMODE | VFAINT | Data mode | 
| READMODE | TIMED | Read mode | 
| FP_TEMP | 153.4460144 | Focal Plane Temperature [K] | 
| FSW_VERS | 31 | ACIS flight software version number | 
| Parameter | Value | Description | 
|---|---|---|
| ASCDSVER | 7.6.7.2 | ASCDS version number | 
| DATE | 2006-04-25T02:22:04 | Date and time of file creation | 
| DATE-OBS | 2004-08-20T15:22:34 | Observation start date | 
| DATE-END | 2004-08-21T00:09:56 | Observation end date | 
| INSTRUME | ACIS | Instrument | 
| DETNAM | ACIS-01236 | Detector | 
| GRATING | NONE | Grating | 
| OBJECT | Abell 3921 | Source name | 
| TITLE | High resolution observations of the merging cluster Abell 3921 | Pro | 
| OBSERVER | Ms. Chiara Ferrari | Principal investigator | 
| OBS_ID | 4973 | Observation id | 
| SEQ_NUM | 800418 | Sequence number | 
| RA_NOM | 342.52309430712 | Nominal RA | 
| DEC_NOM | -64.365861295084 | Nominal Dec | 
| ROLL_NOM | 15.585480237096 | Nominal Roll |