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OBSID:
29083
 Title:
Characterizing the largest (~40kpc) radio jet in the first Gyr of the Universe 
Investigator:
Banados
 Observer:
Connor, Thomas
 Phone:
3304070358
 Email:
thos.connor@gmail.com
Target Name:
PSO J135.3860+16.2518
 Sequence Number:
705131
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_0057AB
 Raster Scan:
N
 Annotated DOT:
DEC1123a

Proposal Number:
24700542
 Right Ascension:
135.386
 Declination:
16.2519
 Status:
archived
 Start Date:
2023-12-11 09:19:43
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
GO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.001
 Order-1 Count Rate:

 Exposure Time:
9.5
 Time Remaining:
8.980
 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:
Relativistic jets are thought to play a key role on the formation of massive galaxies and supermassive black holes (SMBHs). Notably, all radio jets known at z>5 are compact, with the largest one known extending for ~2kpc. However, we recently discovered a z=5.7 radio-jet >20x larger than any other jet reported at z>5: three distinct components with a total extent of ~7 arcsec or ~40 physical kpc. Here, we propose quasi-contemporary VLA/Chandra observations of this system. We will 1) determine the radio SED of each component (steep, flat, peaked?); 2) measure its X-ray photon index and obtain an independent estimate of the jet orientation and accretion rate. 3) Estimate the magnetic field (using both radio and X-ray data), setting strong observational constraints on the IC/CMB effect.

Remarks:
1. Time coordination: Our approved request was only for VLA / CXO in the same semester. Owing to the large redshift, closer observations are not required. Contact Observer if further questions about coordination. 2. Source and Field count rates taken from previous observation. 3. S2 requested for radiation monitoring purposes.

psci Run:
108
 Processing Date:
Jan 3 2024
 psci Directory:
/nfs/maaxnew/r3/fl/acis126b/acis126.log
OBSID:
29083
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
705131
 Target Name:
PSO_J135.3860+1
 AO:
24
Start VCDU:
127642:104
 Start Time (UTC):
345:34401.486
 Stop Time (UTC):
345:43396.896
 Kilosecs:
9.0
 % Frames:
100.0
 # CCDs:
S2
# Frames:
2958
 # Events:
95947
 Events/sec:
10
 PSCI errors:
0
 % drops:
0.1
 Bias Errs:
0
 FP Temp:
-109.6
Parameter Block:
0x0057a034
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te5x5
 BEP Mode:
F
 Start Row:
0
 # Rows:
1024
Primary Exposure:
30
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
108

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