| Chandra X-ray Center | 	PI: Professor Gordon Garmire  | 
| Parameter | Value | Description | 
|---|---|---|
| ASCDSVER | 7.6.7.1 | ASCDS version number | 
| DATE | 2006-04-10T23:18:49 | Date and time of file creation | 
| DATE-OBS | 2004-12-01T15:32:07 | Observation start date | 
| DATE-END | 2004-12-02T05:56:04 | Observation end date | 
| RA_PNT | 216.17776749546 | Pointing RA | 
| DEC_PNT | 22.944597275102 | Pointing Dec | 
| ROLL_PNT | 37.132725976331 | Pointing Roll | 
| RA_TARG | 216.15875 | Observer's specified target RA | 
| DEC_TARG | 22.9335 | Observer's specified target Dec | 
| DATAMODE | VFAINT | Data mode | 
| READMODE | TIMED | Read mode | 
| FP_TEMP | 153.2848053 | Focal Plane Temperature [K] | 
| FSW_VERS | 31 | ACIS flight software version number | 
| Parameter | Value | Description | 
|---|---|---|
| ASCDSVER | 7.6.7.1 | ASCDS version number | 
| DATE | 2006-04-11T00:27:53 | Date and time of file creation | 
| DATE-OBS | 2004-12-01T15:32:07 | Observation start date | 
| DATE-END | 2004-12-02T05:56:04 | Observation end date | 
| INSTRUME | ACIS | Instrument | 
| DETNAM | ACIS-7 | Detector | 
| GRATING | NONE | Grating | 
| OBJECT | B1422+231 | Source name | 
| TITLE | X-RAY OBSERVATIONS OF GALAXY GROUPS ASSOCIATED WITH GRAVITATIONAL LENSES | Proposal title | 
| OBSERVER | Professor Gordon Garmire | Principal investigator | 
| OBS_ID | 4939 | Observation id | 
| SEQ_NUM | 800390 | Sequence number | 
| RA_NOM | 216.17776749546 | Nominal RA | 
| DEC_NOM | 22.944597275102 | Nominal Dec | 
| ROLL_NOM | 37.132725976331 | Nominal Roll |