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OBSID:
29255
 Title:
G0.17-0.41: Evidence for interstellar magnetic reconnection in the Galactic center?
Investigator:
Wang
 Observer:
Wang, Q. Daniel
 Phone:
413 545 2131
 Email:
wqd@umass.edu
Target Name:
XMM J0.173-0.413
 Sequence Number:
901833
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_006E6B
 Raster Scan:
N
 Annotated DOT:
MAY2724a

Proposal Number:
24910062
 Right Ascension:
266.914
 Declination:
-29.0041
 Status:
archived
 Start Date:
2024-06-01 18:57:27
Category:
GALACTIC DIFFUSE EMISSION AND SURVEYS
 Type:
GO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
-1.06
 Z Offset:
1.1
Est. Count Rate:
0.01
 Order-1 Count Rate:

 Exposure Time:
15
 Time Remaining:
14.092
 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:
Magnetic field may play a key role in regulating the environment of the Galactic center. We propose a deep Chandra observation of G0.17-0.41 -- a distinct 2.6'-long X-ray thread embedded within a locally inflated nonthermal radio filament. The morphological and spectral properties of this radio/X-ray association suggest that magnetic re-connection is the energy source, providing probably the best evidence so far for this process to occur in the ISM. The observation will enable a critical test of this scenario, chiefly by determining the thermal or nonthermal nature of the X-ray emission, as well as its substructure and position-dependent spectral characteristics. The understanding of the process can have strong implications for the study of plasma heating and cosmic-ray acceleration.

psci Run:
346
 Processing Date:
Jul 18 2024
 psci Directory:
/nfs/maaxnew/r3/fm/acis127d/acis127.log
OBSID:
29255
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
901833
 Target Name:
XMM_J0.173-0.41
 AO:
24
Start VCDU:
60116:080
 Start Time (UTC):
153:69246.605
 Stop Time (UTC):
153:83349.856
 Kilosecs:
14.1
 % Frames:
100.0
 # CCDs:
I4
# Frames:
4490
 # Events:
193679
 Events/sec:
13
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
1
 FP Temp:
-114.7
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:
346

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