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OBSID:
28492
 Title:
What drives the dichotomy in the radio galaxy population?    
Investigator:
Kraft
 Observer:
Stroe, Andra
 Phone:
617-460-1165
 Email:
astroe@stsci.edu
Target Name:
Abell 3936
 Sequence Number:
802008
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_00458B
 Raster Scan:
N
 Annotated DOT:
AUG2123a

Proposal Number:
23800657
 Right Ascension:
343.497
 Declination:
-34.9168
 Status:
archived
 Start Date:
2023-08-24 22:57:29
Category:
CLUSTERS OF GALAXIES
 Type:
GTO
 AO Cycle:
23
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.107
 Order-1 Count Rate:

 Exposure Time:
17
 Time Remaining:
17.086
 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:
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:
One of the biggest challenges in modern radio astronomy is understanding what causes the Fanaroff-Riley (FR-I/II) morphological dichotomy in the powerful radio galaxy population. PKS 2250-351 (z=0.21), located within the Abell 3936 galaxy cluster, is a rare example of a hybrid morphology source (HyMoRS), with an FR-II hotspot and an FR-I jet and lobe on either side. The Chandra observations will probe, the first time, the large scale environment around a HyMoRS. Our observations will test whether the FR-I/II dichotomy is caused by interaction between the jets of PKS 2250-351 with an overdense, asymmetric environment and will thus yield crucial insights into jet launching in black holes.

Remarks:
N/A

psci Run:
127
 Processing Date:
Sep 7 2023
 psci Directory:
/nfs/maaxnew/r3/fk/acis125b/acis125.log
OBSID:
28492
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
802008
 Target Name:
Abell_3936
 AO:
23
Start VCDU:
104160:088
 Start Time (UTC):
236:83847.743
 Stop Time (UTC):
237:14544.404
 Kilosecs:
17.1
 % Frames:
100.0
 # CCDs:
I5
# Frames:
5443
 # Events:
378168
 Events/sec:
22
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
1
 FP Temp:
-116.0
Parameter Block:
0x00458034
 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:
127

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