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OBSID:
26906
 Title:
Examining the Variability of High-Redshift Jets      
Investigator:
Meyer
 Observer:
Meyer, Eileen T.
 Phone:
8328772487
 Email:
meyer@umbc.edu
Target Name:
B3 1239+376
 Sequence Number:
704827
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_00D50
 Raster Scan:
N
 Annotated DOT:
DEC2622a

Proposal Number:
24700447
 Right Ascension:
190.541
 Declination:
37.3349
 Status:
archived
 Start Date:
2022-12-31 14:47:45
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
GO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
1
 Order-1 Count Rate:

 Exposure Time:
20
 Time Remaining:
20.054
 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:
F
On-Chip Summing?:
No
 Row Sum:

 Column Sum:

 Frame Time:
Subarray Mode:
CUSTOM
 Starting Row:
449
 Row Count:
128
 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:
Recent work has shown that kpc-scale X-ray jets are variable on timescales of weeks to a few years. Variability places very strong constraints on the characteristics of the emitting region, and rules out inverse-Compton upscattered CMB as the origin for the unidentified hard X-ray component. However, very few X-ray jets at redshifts z>2 have the multiple Chandra observations required to test for variability. Here we propose moderate-depth snapshots (20 ks each) of 14 X-ray jets previously detected by Chandra with redshifts ranging from 2-5. This will enable both variability studies and better spectral constraints to understand the nature of extragalactic X-ray jets at high redshift.

psci Run:
343
 Processing Date:
Jan 3 2023
 psci Directory:
/nfs/maaxnew/r3/fh/acis122e/acis122.log
OBSID:
26906
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
704827
 Target Name:
B3_1239+376
 AO:
24
Start VCDU:
53137:104
 Start Time (UTC):
365:54723.230
 Stop Time (UTC):
365:74779.897
 Kilosecs:
20.1
 % Frames:
100.0
 # CCDs:
S2
# Frames:
37071
 # Events:
38067
 Events/sec:
1
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-116.8
Parameter Block:
0x00d51014
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te3x3
 BEP Mode:
F
 Start Row:
448
 # Rows:
128
Primary Exposure:
5
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
No
 Trickle?:
Yes
 Bias Run:
342

pgf@space.mit.edu Tue Apr 8 9:48:31 EST 2025