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OBSID:
27759
 Title:
Completing Observations of the Highest-Redshift Planck SZ Clusters   
Investigator:
Mantz
 Observer:
Mantz, Adam
 Phone:
650-498-7747
 Email:
amantz@stanford.edu
Target Name:
PSZ2 G078.67+20.06
 Sequence Number:
802037
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_00458B
 Raster Scan:
N
 Annotated DOT:
MAR1723a

Proposal Number:
24800082
 Right Ascension:
282.979
 Declination:
49.044
 Status:
archived
 Start Date:
2023-03-26 11:25:13
Category:
CLUSTERS OF GALAXIES
 Type:
GO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
-1.4
 Z Offset:
1
Est. Count Rate:
0.05
 Order-1 Count Rate:

 Exposure Time:
10
 Time Remaining:
10.081
 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:
Measurements of the growth of cosmic structure, based on the number density and mass distribution of galaxy clusters as a function of redshift, place powerful constraints on cosmological models. As the only all-sky Sunyaev-Zel'dovich (SZ) selected cluster sample, Planck's PSZ2 sample has a uniquely powerful role. Despite this, follow-up X-ray observations of the z>0.4 PSZ2 sample are incomplete, with archival coverage biased towards the X-ray brightest systems, which is problematic for most cosmological studies. Completing the X-ray follow-up coverage, and thus providing low-scatter X-ray mass proxies for every cluster at z>0.4, will enable significantly improved, more robust cosmological constraints to be obtained.

Remarks:
The SIM Z translation was originally put in to move the object away from the chip gaps on ACIS-I. After discussion with the observer, it was decided to instead do a pointing offset with the same magnitude.

psci Run:
322
 Processing Date:
Apr 10 2023
 psci Directory:
/nfs/maaxnew/r3/fi/acis123e/acis123.log
OBSID:
27759
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
802037
 Target Name:
PSZ2_G078.67+20
 AO:
24
Start VCDU:
98350:008
 Start Time (UTC):
085:42176.906
 Stop Time (UTC):
085:52269.038
 Kilosecs:
10.1
 % Frames:
100.0
 # CCDs:
I5
# Frames:
3213
 # Events:
230700
 Events/sec:
22
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-111.2
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:
322

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