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OBSID:
25205
 Title:
Chandra Observation of the Late-Time Interacting Type Ib SN 2004dk   
Investigator:
Pooley
 Observer:
Pooley, David
 Phone:
6172301098
 Email:
davepooley@me.com
Target Name:
SN 2004dk
 Sequence Number:
503328
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_005ECB
 Raster Scan:
N
 Annotated DOT:
MAY1523a

Proposal Number:
23500364
 Right Ascension:
245.454
 Declination:
-2.27147
 Status:
archived
 Start Date:
2023-05-15 10:27:13
Category:
SN, SNR AND ISOLATED NS
 Type:
GO
 AO Cycle:
23
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.005
 Order-1 Count Rate:

 Exposure Time:
22
 Time Remaining:
22.914
 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:
0
 Optional Chips:
S1
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?:
Yes
 Filter Threshold:
0.24
 Filter Range:
12
 Bias Requested?:
No
 Bias Frequency:

 Bias After?:
No
 Spatial Window?:
No

Abstract:
In recent years, many old Type I and Type IIb supernovae (SNe) have shown signatures of late-time interaction between the SN ejecta and circumstellar material (CSM) from the progenitor system. One of those objects, SN 2004dk, has displayed fascinating late-time interaction behavior which may be modeled as a CSM that was "pre-prepared" by a fast wind interaction with a slow wind. Chandra and VLA data from 2019 show increasing X-ray flux and a radio flux as high as at discovery over 15 years ago. We propose X-ray and radio observations to test this wind-bubble model and further constrain the mass-loss history of the progenitor, including when it may have made the transition to being hydrogen-deficient.

psci Run:
173
 Processing Date:
Jun 5 2023
 psci Directory:
/nfs/maaxnew/r3/fj/acis124c/acis124.log
OBSID:
25205
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
503328
 Target Name:
SN_2004dk
 AO:
23
Start VCDU:
98878:000
 Start Time (UTC):
135:38546.625
 Stop Time (UTC):
135:61473.128
 Kilosecs:
22.9
 % Frames:
100.0
 # CCDs:
S4
# Frames:
7299
 # Events:
588740
 Events/sec:
25
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-114.2
Parameter Block:
0x005ec034
 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:
173

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