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OBSID:
27171
 Title:
Unveiling the Nature of a Dust Reddened Quasar Hosting a Ten-Billion Solar Mass Black Hole at z=7.1
Investigator:
Yang
 Observer:
Yang, Jinyi
 Phone:
5203603966
 Email:
jinyiyang@email.arizona.edu
Target Name:
J0038
 Sequence Number:
704773
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_007F2B
 Raster Scan:
N
 Annotated DOT:
JUL0124a

Proposal Number:
24700319
 Right Ascension:
9.51576
 Declination:
-6.88969
 Status:
archived
 Start Date:
2024-07-01 08:27:26
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
GO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.22
 Order-1 Count Rate:

 Exposure Time:
14
 Time Remaining:
13.334
 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:
I2 S5
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:
Recently, a unique luminous quasar at z=7.1 has been discovered, hosting a super-massive black hole (SMBH) with at least 10 billion solar masses. It is the only known quasar at z>6.5 with 10 billion solar mass BH and also the most distant dust-reddened quasar known. Its rest-frame UV continuum shows evidence of strong dust reddening, which is highly unusual, suggestive of extinction due to supernova produced dust. This new quasar provides a unique opportunity to study the SMBH growth and early quasar evolution. The proposed Chandra observations will, for the first time, directly probe BH accretion properties of a ten billion solar mass BH at z>7 and measure the column density to explore its obscuration in the early growing phase of a quasar during the epoch of reionization.

psci Run:
464
 Processing Date:
Jul 20 2024
 psci Directory:
/nfs/maaxnew/r3/fm/acis127e/acis127.log
OBSID:
27171
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
704773
 Target Name:
J0038
 AO:
24
Start VCDU:
6915:112
 Start Time (UTC):
183:31708.984
 Stop Time (UTC):
183:45055.516
 Kilosecs:
13.3
 % Frames:
100.0
 # CCDs:
I6
# Frames:
4118
 # Events:
346985
 Events/sec:
25
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-113.7
Parameter Block:
0x007f2024
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te5x5
 BEP Mode:
F
 Start Row:
0
 # Rows:
1024
Primary Exposure:
32
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
464

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