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OBSID:
29506
 Title:
Electron heating mechanism behind the equatorial shock     
Investigator:
Sarkar
 Observer:
Sarkar, Arnab
 Phone:
6462553017
 Email:
arnabsar@mit.edu
Target Name:
1E 2215.7-0404 / 1E 2216.0-0401
 Sequence Number:
802152
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_006E6B
 Raster Scan:
N
 Annotated DOT:
AUG1224a

Proposal Number:
25800327
 Right Ascension:
334.612
 Declination:
-3.77474
 Status:
observed
 Start Date:
2024-08-13 06:27:09
Category:
CLUSTERS OF GALAXIES
 Type:
GO
 AO Cycle:
25
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.1
 Order-1 Count Rate:

 Exposure Time:
31
 Time Remaining:
31.093
 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:
1
 Optional Chips:
S2
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:
Electron heating mechanism behind a shock front is still up for debate. With this 740 ks Chandra observation of 1E2215/16, we will primarily investigate the electron heating mode behind the only known equatorial merger shock. Though axial merger shocks have been studied extensively using Chandra and XMM-Newton (Abell 2146 for example), the driving mechanism and properties of equatorial shocks are largely unknown.

psci Run:
84
 Processing Date:
Sep 4 2024
 psci Directory:
/nfs/maaxnew/r3/fn/acis128b/acis128.log
OBSID:
29506
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
802152
 Target Name:
1E_2215.7-0404_
 AO:
25
Start VCDU:
119963:064
 Start Time (UTC):
226:24185.277
 Stop Time (UTC):
226:55287.948
 Kilosecs:
31.1
 % Frames:
100.0
 # CCDs:
I4
# Frames:
9902
 # Events:
442310
 Events/sec:
14
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-110.4
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:
84

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