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OBSID:
25959
 Title:
Opening Pandora's Box: Direct Detection of AGN at z>7     
Investigator:
Bogdan
 Observer:
Bogdan, Akos
 Phone:
6174957380
 Email:
abogdan@cfa.harvard.edu
Target Name:
Abell 2744
 Sequence Number:
704323
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_006E6B
 Raster Scan:
N
 Annotated DOT:
JUL3123b

Proposal Number:
23700107
 Right Ascension:
3.58854
 Declination:
-30.4012
 Status:
archived
 Start Date:
2023-08-05 15:29:46
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
GO
 AO Cycle:
23
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.3
 Order-1 Count Rate:

 Exposure Time:
16
 Time Remaining:
15.589
 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
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:
Observations of high-redshift quasars demonstrate that many supermassive black holes (BHs) reached large masses within one billion years after the Big Bang. However, the origin of the first BHs is still a mystery and poses one of the most fascinating unsolved problems in modern astrophysics. In this program, we will employ a novel approach and probe galaxies and their BHs when the Universe was 400-800 million years old. To this end, we will build a unique synergy between Chandra and JWST: we will utilize ultra-deep Chandra observations to study the X-ray emission from growing BHs in high-redshift JWST-identified galaxies by harnessing the power of lensing magnification from the galaxy cluster, Abell 2744. Our program will provide powerful constraints on the origin and early growth of BHs.

psci Run:
54
 Processing Date:
Aug 15 2023
 psci Directory:
/nfs/maaxnew/r3/fk/acis125a/acis125.log
OBSID:
25959
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
704323
 Target Name:
Abell_2744
 AO:
23
Start VCDU:
53284:056
 Start Time (UTC):
217:56579.683
 Stop Time (UTC):
217:72181.260
 Kilosecs:
15.6
 % Frames:
100.0
 # CCDs:
I4
# Frames:
4967
 # Events:
264145
 Events/sec:
16
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-112.8
Parameter Block:
0x006e6034
 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