C H A N D R A   S C I E N C E   C E N T E R
O B S E R V A T I O N   C A T A L O G

OBSID:
28479
 Title:
AO-25 Observations of the Perseus Cluster       
Investigator:
Calibration
 Observer:
Bogdan, Akos
 Phone:
617 495-7380
 Email:
abogdan@cfa.harvard.edu
Target Name:
Perseus Cluster
 Sequence Number:
890242
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_00972
 Raster Scan:
N
 Annotated DOT:
SEP1624a

Proposal Number:
25800489
 Right Ascension:
49.9508
 Declination:
41.5117
 Status:
archived
 Start Date:
2024-09-20 00:48:05
Category:
CLUSTERS OF GALAXIES
 Type:
CAL
 AO Cycle:
25
 Dither Flag:
Y
 Y Offset:
6.2
 Z Offset:
0
Est. Count Rate:
15
 Order-1 Count Rate:

 Exposure Time:
10
 Time Remaining:
9.945
 Reqd Start Time:

 Reqd Stop Time:
Period:

 Epoch:

 Start of Period:

 End of Period:

 PS Margin:

 PE Margin:

 Max Segments:
0

ACIS Mode:
TE
 Standard?:
No
 BEP Mode:
F
On-Chip Summing?:
No
 Row Sum:

 Column Sum:

 Frame Time:
Subarray Mode:
NONE
 Starting Row:
0
 Row Count:
1023
 Subarray Frame Time:

Duty Cycle?:
No
 Cycle Count:
0
 Primary Exp Time:

 Secondary Exp Time:
Event Filter?:
No
 Filter Threshold:

 Filter Range:

 Bias Requested?:
No
 Bias Frequency:

 Bias After?:
No
 Spatial Window?:
No

Abstract:
These observations of the Perseus cluster are used to monitor the high energy gain of ACIS.

Remarks:
This observation will be used to calibrate the high energy ACIS gain using the Fe-Ka line in Perseus and must be executed with a cold focal plane temperature (-118 to -120 C).

psci Run:
229
 Processing Date:
Sep 25 2024
 psci Directory:
/nfs/maaxnew/r3/fn/acis128c/acis128.log
OBSID:
28479
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
890242
 Target Name:
Perseus_Cluster
 AO:
25
Start VCDU:
88385:048
 Start Time (UTC):
264:03302.252
 Stop Time (UTC):
264:13258.528
 Kilosecs:
10.0
 % Frames:
100.0
 # CCDs:
S2
# Frames:
3274
 # Events:
407443
 Events/sec:
40
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-116.6
Parameter Block:
0x00973024
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te3x3
 BEP Mode:
F
 Start Row:
0
 # Rows:
1024
Primary Exposure:
30
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
No
 Trickle?:
Yes
 Bias Run:
228

pgf@space.mit.edu Thu Apr 3 20:00:53 EST 2025