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OBSID:
25085
 Title:
HIDDEN MAGNETIC FIELDS IN NSs: KES 79 CCO REVISITED     
Investigator:
Gotthelf
 Observer:
Gotthelf, Eric
 Phone:
6466206696
 Email:
eric@astro.columbia.edu
Target Name:
PSR J1852+0040
 Sequence Number:
503273
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
CC_0010CB
 Raster Scan:
N
 Annotated DOT:
JUL0821a

Proposal Number:
22500343
 Right Ascension:
283.161
 Declination:
0.672167
 Status:
archived
 Start Date:
2021-07-09 12:01:07
Category:
SN, SNR AND ISOLATED NS
 Type:
GO
 AO Cycle:
22
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.022
 Order-1 Count Rate:

 Exposure Time:
21
 Time Remaining:
21.101
 Reqd Start Time:

 Reqd Stop Time:
Period:

 Epoch:

 Start of Period:

 End of Period:

 PS Margin:

 PE Margin:

 Max Segments:
0

ACIS Mode:
CC
 Standard?:
No
 BEP Mode:
F
On-Chip Summing?:
No
 Row Sum:

 Column Sum:

 Frame Time:
Subarray Mode:

 Starting Row:

 Row Count:

 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:
We have recently detected a glitch in the spin of 1E 1207.4-5209, the compact central object (CCO) in SNR PKS 1209-51/52, and possibly from a second CCO that we are monitoring, PSR J0821-4300 in SNR Puppis A. This is entirely unexpected for pulsars with a spin-down rates as small as those found for CCOs. These detections supports a recent conjecture that glitches could be triggered by the diffusion of a buried magnetar strength internal field, 10,000 larger than the dipole fields inferred for CCOs. Here, we propose to search for similar timing anomalies from the third known CCO pulsar, PSR J1852+0040 in SNR Kes 79. A detection will reveal a general property of CCOs with important theoretical implications for NS B-field structure and emission mechanisms, and their evolution.

psci Run:
141
 Processing Date:
Jul 25 2021
 psci Directory:
/nfs/maaxnew/r3/fb/acis116c/acis116.log
OBSID:
25085
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
503273
 Target Name:
PSR_J1852+0040
 AO:
22
Start VCDU:
30958:088
 Start Time (UTC):
190:44292.593
 Stop Time (UTC):
190:65526.730
 Kilosecs:
21.2
 % Frames:
100.0
 # CCDs:
S1
# Frames:
14552
 # Events:
325880
 Events/sec:
15
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-118.9
Parameter Block:
0x0010c014
 Window Block:
-
 # Windows:
0
 FEP Mode:
Cc3x3
 BEP Mode:
F
 Start Row:
0
 # Rows:
512
Primary Exposure:
-
 Secondary Exposure:
-
 Duty Cycle:
-
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
141

pgf@space.mit.edu Sat Mar 29 10:37:19 EST 2025