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OBSID:
26055
 Title:
A Low-z Anchor Sample for Cluster Evolutionary Studies (ACIS GTO)   
Investigator:
Garmire
 Observer:
McDonald, Michael
 Phone:
781-507-3513
 Email:
mcdonald@space.mit.edu
Target Name:
PSZ2G073.97-27.82
 Sequence Number:
801987
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_00458B
 Raster Scan:
N
 Annotated DOT:
AUG2922a

Proposal Number:
23800108
 Right Ascension:
328.423
 Declination:
17.6986
 Status:
archived
 Start Date:
2022-09-03 02:51:23
Category:
CLUSTERS OF GALAXIES
 Type:
GTO
 AO Cycle:
23
 Dither Flag:
Y
 Y Offset:
-1
 Z Offset:
1
Est. Count Rate:
0.85192
 Order-1 Count Rate:

 Exposure Time:
2.35
 Time Remaining:
2.427
 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:
S2
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:
In recent years, samples of galaxy clusters selected via the Sunyaev-Zel'dovich effect have enabled studies of galaxy cluster evolution over nearly 10 Gyr in cosmic time. To anchor these, and future studies, we propose Chandra observations of the first complete, mass-selected, and unbiased sample of galaxy clusters at z~0.2. This sample of 108 clusters will immediately allow for a variety of studies, including cluster demographics, AGN populations, and self similarity, alongside the search for rare, extreme systems such as the Bullet and Phoenix clusters. By design, this sample would prove the perfect complement to the completed eRosita All-Sky Survey, providing low-S/N, wide-field, high angular resolution imaging alongside wide-field, high-S/N (>5000 counts) eRASS imaging and spectra.

psci Run:
174
 Processing Date:
Sep 7 2022
 psci Directory:
/nfs/maaxnew/r3/fg/acis121c/acis121.log
OBSID:
26055
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
801987
 Target Name:
PSZ2G073.97-27.
 AO:
23
Start VCDU:
37782:080
 Start Time (UTC):
246:11502.363
 Stop Time (UTC):
246:13939.782
 Kilosecs:
2.4
 % Frames:
100.0
 # CCDs:
I5
# Frames:
776
 # Events:
67946
 Events/sec:
27
 PSCI errors:
0
 % drops:
0.1
 Bias Errs:
0
 FP Temp:
-115.7
Parameter Block:
0x00458034
 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:
174

pgf@space.mit.edu Fri Apr 18 21:01:16 EST 2025