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OBSID:
25076
 Title:
AO-22 Big Dither Observation of Mkn421       
Investigator:
Calibration
 Observer:
Marshall, Herman
 Phone:
617 253-8573
 Email:
hermanm@space.mit.edu
Target Name:
MKN421
 Sequence Number:
790366
 Instrument:
ACIS-S
 Grating:
LETG
 SI Mode:
TE_00BE4B
 Raster Scan:
N
 Annotated DOT:
JUN2121a

Proposal Number:
22700646
 Right Ascension:
166.113
 Declination:
38.2088
 Status:
archived
 Start Date:
2021-06-24 03:18:44
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
CAL
 AO Cycle:
22
 Dither Flag:
Y
 Y Offset:
1.4
 Z Offset:
0
Est. Count Rate:
10
 Order-1 Count Rate:
3
 Exposure Time:
30
 Time Remaining:
30.376
 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
 Dropped Chip Count:
0
 Optional Chips:
S4 S5
On-Chip Summing?:
No
 Row Sum:

 Column Sum:

 Frame Time:
Subarray Mode:
CUSTOM
 Starting Row:
251
 Row Count:
300
 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:
We continue to monitor the build-up of contamination on ACIS with LETG/ACIS-S observations Mkn421.

Remarks:
This observation is to be done with a large amplitude dither. No splits smaller than 15 ks. Prefer all observations in this group to be done within 5 days, with the requirement that they are completed within two weeks.

psci Run:
80
 Processing Date:
Jul 4 2021
 psci Directory:
/nfs/maaxnew/r3/fb/acis116b/acis116.log
OBSID:
25076
 SIM Mode:
ACIS-S
 OTG Mode:
LETG
 Seq Number:
790366
 Target Name:
MKN421
 AO:
22
Start VCDU:
121551:048
 Start Time (UTC):
175:13157.587
 Stop Time (UTC):
175:43537.578
 Kilosecs:
30.4
 % Frames:
100.0
 # CCDs:
S5
# Frames:
26625
 # Events:
815224
 Events/sec:
26
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-115.9
Parameter Block:
0x00be4014
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te3x3
 BEP Mode:
F
 Start Row:
250
 # Rows:
300
Primary Exposure:
11
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
80

pgf@space.mit.edu Sat Mar 29 10:37:19 EST 2025