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OBSID:
28943
 Title:
High-resolution X-ray tomography of the western lobe of W50 - a PeVatron accelerator driven by SS 433's jets
Investigator:
Tsuji
 Observer:
Tsuji, Naomi
 Phone:
+81 0463-59-4111
 Email:
naomi060703@icloud.com
Target Name:
SS 433 w2
 Sequence Number:
402312
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_006E6B
 Raster Scan:
N
 Annotated DOT:
OCT0123a

Proposal Number:
23400293
 Right Ascension:
287.439
 Declination:
5.07233
 Status:
archived
 Start Date:
2023-10-08 01:02:20
Category:
BH AND NS BINARIES
 Type:
GO
 AO Cycle:
23
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.11
 Order-1 Count Rate:

 Exposure Time:
10
 Time Remaining:
10.465
 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:
2
 Optional Chips:
S2 S3
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:
The proposed Chandra ACIS observations will provide the highest resolution X-ray view of the western lobe of W50 powered by the Galactic microquasar SS 433 and recently identified by HAWC as a Galactic PeVatron accelerator. Chandra will resolve and characterize the X-ray knots and shock structures likely associated with local magnetic field enhancement and jet-ISM interaction. Our primary goals are: (1) determine the jet velocity profile through measuring the knots' proper motion, and (2) spatially resolved X-ray study to probe the morphology and spectral evolution along the jet. This investigation, uniquely suited for Chandra, will test fundamental theories for understanding the jet dynamics, knot formation, and particle acceleration processes.

psci Run:
313
 Processing Date:
Oct 24 2023
 psci Directory:
/nfs/maaxnew/r3/fk/acis125d/acis125.log
OBSID:
28943
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
402312
 Target Name:
SS_433_w2
 AO:
23
Start VCDU:
89216:008
 Start Time (UTC):
281:04698.025
 Stop Time (UTC):
281:15176.420
 Kilosecs:
10.5
 % Frames:
100.0
 # CCDs:
I4
# Frames:
3336
 # Events:
159253
 Events/sec:
15
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-116.0
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:
313

pgf@space.mit.edu Thu Apr 3 20:00:53 EST 2025