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OBSID:
27446
 Title:
An random sub-sample of lambda=25-80 redMaPPer clusters     
Investigator:
Sun
 Observer:
Sun, Ming
 Phone:
256-824-2126
 Email:
ms0071@uah.edu
Target Name:
RMJ234422.8-072526.5
 Sequence Number:
802099
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_006E6B
 Raster Scan:
N
 Annotated DOT:
SEP1922a

Proposal Number:
20801062
 Right Ascension:
356.095
 Declination:
-7.42403
 Status:
archived
 Start Date:
2022-09-21 00:09:54
Category:
CLUSTERS OF GALAXIES
 Type:
CCT
 AO Cycle:
20
 Dither Flag:
Y
 Y Offset:
-1.4
 Z Offset:
-0.1
Est. Count Rate:
0.05
 Order-1 Count Rate:

 Exposure Time:
10
 Time Remaining:
10.087
 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:
VF
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:
X-ray scaling relations of the intracluster medium are important for both cluster cosmology and baryon physics. There have already been a lot of data of galaxy clusters in the Chandra archive. However, the Chandra archive sample is not a representative sample of galaxy clusters, with many clusters selected for their X-ray properties. We propose to take advantage of the randomness of the Chandra Cool Attitude Target observations to obtain a sample of lambda = 25 - 80 redMaPPer clusters with the highest expected X-ray flux. Combined with the existing data in the Chandra archive, a large representative sample of lambda = 25 - 80 redMaPPer clusters will be constructed, which will provide important insights on the X-ray selection bias, cluster scaling relations and typical cluster core properties.

Remarks:
N/A

psci Run:
268
 Processing Date:
Sep 25 2022
 psci Directory:
/nfs/maaxnew/r3/fg/acis121d/acis121.log
OBSID:
27446
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
802099
 Target Name:
RMJ234422.8-072
 AO:
20
Start VCDU:
84892:088
 Start Time (UTC):
264:01378.667
 Stop Time (UTC):
264:11477.135
 Kilosecs:
10.1
 % Frames:
100.0
 # CCDs:
I4
# Frames:
3215
 # Events:
212805
 Events/sec:
21
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-117.5
Parameter Block:
0x006e6034
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te5x5
 BEP Mode:
F
 Start Row:
0
 # Rows:
1024
Primary Exposure:
31
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
268

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