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OBSID:
26953
 Title:
Studying a Co-Evolving Cluster Population over 9 Gyr with Chandra   
Investigator:
McDonald
 Observer:
McDonald, Michael
 Phone:
(617) 324-1075
 Email:
mcdonald@space.mit.edu
Target Name:
SPT-CLJ2233-5552
 Sequence Number:
802067
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_0064CB
 Raster Scan:
N
 Annotated DOT:
MAY2724a

Proposal Number:
24800375
 Right Ascension:
338.406
 Declination:
-55.877
 Status:
archived
 Start Date:
2024-05-27 21:36:25
Category:
CLUSTERS OF GALAXIES
 Type:
GO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
-1
 Z Offset:
1
Est. Count Rate:
0.001
 Order-1 Count Rate:

 Exposure Time:
16.8
 Time Remaining:
16.720
 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
 Dropped Chip Count:
0
 Optional Chips:
S3
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:
The study of galaxy cluster evolution has exploded in recent years with the advent of Sunyaev Zel'dovich surveys. However, these surveys, which are redshift-independent but strongly mass dependent, are sensitive to increasingly rare clusters as a function of redshift. This may be biasing evolutionary studies which compare z>1 clusters to z~0 clusters despite the fact that these samples are not evolutionarily connected. We propose here the extension of a sample of 200 clusters spanning 9 Gyr in cosmic time that all lie along the same evolutionary track. This sample will provide new, strong constraints on the evolution of the cool core fraction, the evolution of the merger rate and relaxation time, and the evolution of AGN in clusters, along with a variety of other exciting topics.

psci Run:
321
 Processing Date:
Jul 18 2024
 psci Directory:
/nfs/maaxnew/r3/fm/acis127c/acis127.log
OBSID:
26953
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
802067
 Target Name:
SPT-CLJ2233-555
 AO:
24
Start VCDU:
47229:048
 Start Time (UTC):
148:78685.844
 Stop Time (UTC):
149:09018.199
 Kilosecs:
16.7
 % Frames:
100.0
 # CCDs:
I5
# Frames:
5327
 # Events:
323774
 Events/sec:
19
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-110.6
Parameter Block:
0x0064c034
 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:
321

pgf@space.mit.edu Mon Mar 31 10:36:39 EST 2025