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OBSID:
28610
 Title:
Magnifying the First Black Holes: Chandra and JWST Observations of Abell 370 
Investigator:
Bogdan
 Observer:
Bogdan, Akos
 Phone:
6174957380
 Email:
abogdan@cfa.harvard.edu
Target Name:
Abell 370
 Sequence Number:
704981
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_006E6B
 Raster Scan:
N
 Annotated DOT:
FEB1725a

Proposal Number:
25700214
 Right Ascension:
39.9604
 Declination:
-1.5856
 Status:
archived
 Start Date:
2025-02-17 21:56:02
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
GO
 AO Cycle:
25
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.2
 Order-1 Count Rate:

 Exposure Time:
14
 Time Remaining:
14.588
 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:
Supermassive black holes (BHs) play a crucial role in the cosmic evolution and they were in place at the earliest epochs in the history of the Universe. Yet, the origin of the first BHs is still a mystery. The cleanest observations to probe the formation and early growth of BHs is offered by the detection of z>7 BHs. In this project, we will exploit one of nature's telescopes, Abell 370, and combine the unique capabilities of JWST and Chandra. We will search for accreting BHs in JWST-detected gravitationally-lensed galaxies by using the proposed deep Chandra observations of Abell 370. This study will open a new window into accreting BHs and deliver the much-needed detection of z>7 BHs, thereby constraining the formation scenarios and the rapid early growth of the first BHs.

psci Run:
462
 Processing Date:
Mar 5 17:45
 psci Directory:
/nfs/maaxnew/r3/fo/acis129d/acis129.log
OBSID:
28610
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
704981
 Target Name:
Abell_370
 AO:
25
Start VCDU:
92600:024
 Start Time (UTC):
048:80114.973
 Stop Time (UTC):
049:08317.568
 Kilosecs:
14.6
 % Frames:
100.0
 # CCDs:
I4
# Frames:
4649
 # Events:
192177
 Events/sec:
13
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-112.0
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:
462

pgf@space.mit.edu Wed Mar 26 10:00:48 EST 2025