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:
27381
 Title:
Studying a Co-Evolving Cluster Population over 9 Gyr with Chandra (HRC GTO) 
Investigator:
Kraft
 Observer:
McDonald, Michael
 Phone:
7815073513
 Email:
mcdonald@space.mit.edu
Target Name:
SPT-CLJ2214-5501
 Sequence Number:
802074
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_006E6
 Raster Scan:
N
 Annotated DOT:
AUG0524b

Proposal Number:
24800499
 Right Ascension:
333.529
 Declination:
-55.0293
 Status:
archived
 Start Date:
2024-08-11 01:47:45
Category:
CLUSTERS OF GALAXIES
 Type:
GTO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
-1
 Z Offset:
1
Est. Count Rate:
0.001
 Order-1 Count Rate:

 Exposure Time:
53.3
 Time Remaining:
53.207
 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:
1
 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, using HRC GTO time. This sample will provide new constraints on the evolution of the cool core fraction, the merger rate and relaxation time, and AGN in clusters, along with a variety of other exciting topics.

psci Run:
78
 Processing Date:
Sep 4 2024
 psci Directory:
/nfs/maaxnew/r3/fn/acis128b/acis128.log
OBSID:
27381
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
802074
 Target Name:
SPT-CLJ2214-550
 AO:
24
Start VCDU:
114224:112
 Start Time (UTC):
224:07710.211
 Stop Time (UTC):
224:60929.139
 Kilosecs:
53.2
 % Frames:
100.0
 # CCDs:
I4
# Frames:
16943
 # Events:
753264
 Events/sec:
14
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-111.7
Parameter Block:
0x006e7034
 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?:
No
 Trickle?:
Yes
 Bias Run:
77

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