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OBSID:
27499
 Title:
Measuring the Expansion of the SNR N132D in X-rays     
Investigator:
Kraft
 Observer:
Plucinsky, Paul
 Phone:
6177214366
 Email:
pplucinsky@cfa.harvard.edu
Target Name:
LMC N132D
 Sequence Number:
503362
 Instrument:
HRC-I
 Grating:
NONE
 SI Mode:
H2C_0001B
 Raster Scan:
N
 Annotated DOT:
JUL1723a

Proposal Number:
23500655
 Right Ascension:
81.2588
 Declination:
-69.6417
 Status:
archived
 Start Date:
2023-07-21 22:43:29
Category:
SN, SNR AND ISOLATED NS
 Type:
GTO
 AO Cycle:
23
 Dither Flag:
Y
 Y Offset:

 Z Offset:
Est. Count Rate:
12.8
 Order-1 Count Rate:

 Exposure Time:
12.50
 Time Remaining:

 Reqd Start Time:

 Reqd Stop Time:
Period:

 Epoch:

 Start of Period:

 End of Period:

 PS Margin:

 PE Margin:

 Max Segments:
0

Trigger Level:
DEF
 Range Switch Lvl:
DEF
 Spect Mode:
DEF
 Antico Enab:
DEF
 Width Enab:
DEF
 Width Thold:
DEF
 Uld Enab:
DEF
 Upper Lvl Disc:
DEF
Blank Enab:
EDGE
 U Blank Hi:
119
 V Blank Hi:
119
 U Blank Lo:
69
 V Blank Lo:
69
 Py Shutter Pos:
DEF
 My Shutter Pos:
DEF
 Timing Mode:
N

Abstract:
We propose a 50ks GO + 50ks GTO observation of SNR N132D with HRC-I to measure the expansion of the forward shock and bright interior filaments. We will measure this expansion along the southern rim of the remnant where the shock is interacting with a dense molecular cloud and in a blowout region in the north where the shock is expanding into a low density medium. Derived shock velocities will be determined to an accuracy of ~30%, and combined with a new HST determination of the expansion center, to strongly constrain evolutionary models. We will also identify high velocity ejecta features from the large values of their proper motion to be compared with high velocity O-rich filaments observed in the optical. Only Chandra HRC has the sensitivity and resolution to make these measurements.

Remarks:
The original set of GO (25206 50 ks) and GTO (26016 50 ks) observations were split into two pieces each of 25 ks (25206+26171 and 26016+26170), with the requirement that all are carried out uninterrupted and completed within 60 days. This makes it easier to combine the resulting datasets, which is crucial to carry out the science. The ObsCat parameters have been updated to account for this, and the original Remarks have been changed to reflect up-to-date information.

psci Run:
452
 Processing Date:
Jul 25 2023
 psci Directory:
/nfs/maaxnew/r3/fj/acis124e/acis124.log
OBSID:
27499
 SIM Mode:
HRC-I
 OTG Mode:
NONE
 Seq Number:
JUL1723a
 Target Name:
Histogram_I
 AO:
0
Start VCDU:
14564:072
 Start Time (UTC):
202:81882.484
 Stop Time (UTC):
203:09514.744
 Kilosecs:
14.0
 % Frames:
0.3
 # CCDs:
I2
# Frames:
4200
 # Events:
0
 Events/sec:
0
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-113.2
Parameter Block:
0x00d96014
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te3x3
 BEP Mode:
EH
 Start Row:
0
 # Rows:
1024
Primary Exposure:
33
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
Yes
 Trickle?:
No
 Bias Run:
452

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