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OBSID:
23807
 Title:
The Unique Power of Chandra Observations of Gravitationally Lensed Quasars 
Investigator:
Pooley
 Observer:
Pooley, David
 Phone:
6172301098
 Email:
davepooley@me.com
Target Name:
WFI 2033-4723
 Sequence Number:
704219
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_005C6B
 Raster Scan:
N
 Annotated DOT:
JUN1421a

Proposal Number:
22700407
 Right Ascension:
308.425
 Declination:
-47.3953
 Status:
archived
 Start Date:
2021-06-17 15:30:38
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
GO
 AO Cycle:
22
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.04
 Order-1 Count Rate:

 Exposure Time:
15
 Time Remaining:
15.111
 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 S4
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:
A substantial fraction of the stellar mass attributed to galaxies is invisible: stars close to the hydrogen burning limit, brown dwarfs, white dwarfs, neutron stars and black holes (including primordial ones). These constituents do, however, gravitationally micro-lens background quasars, thereby permitting measurement of the total stellar contribution to the mass surface density along the line of sight. Sensitive X-ray observations with a sufficiently long time baseline can unambiguously determine the stellar mass at specific locations in individual lensing galaxies and calibrate the stellar mass fundamental plane, providing a determination of the stellar M/L. We propose to begin systematically obtaining such X-ray light curves, leveraging two decades of existing Chandra data.

psci Run:
54
 Processing Date:
Jul 4 2021
 psci Directory:
/nfs/maaxnew/r3/fb/acis116b/acis116.log
OBSID:
23807
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
704219
 Target Name:
WFI_2033-4723
 AO:
22
Start VCDU:
104449:016
 Start Time (UTC):
168:57241.772
 Stop Time (UTC):
168:72365.800
 Kilosecs:
15.1
 % Frames:
100.0
 # CCDs:
S3
# Frames:
4815
 # Events:
404579
 Events/sec:
26
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-119.3
Parameter Block:
0x005c6024
 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:
54

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