C H A N D R A   S C I E N C E   C E N T E R
O B S E R V A T I O N   C A T A L O G

OBSID:
23716
 Title:
Quantifying the Rate of Nearby Dual AGN       
Investigator:
Foord
 Observer:
Foord, Adi
 Phone:
(650) 926-2846
 Email:
foord@umbc.edu
Target Name:
WISEAJ213202.20-334253.8
 Sequence Number:
704128
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_008FCB
 Raster Scan:
N
 Annotated DOT:
MAY1721a

Proposal Number:
22700210
 Right Ascension:
323.009
 Declination:
-33.715
 Status:
archived
 Start Date:
2021-05-17 16:22:37
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
GO
 AO Cycle:
22
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.274
 Order-1 Count Rate:

 Exposure Time:
2
 Time Remaining:
2.068
 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:
F
On-Chip Summing?:
No
 Row Sum:

 Column Sum:

 Frame Time:
Subarray Mode:
CUSTOM
 Starting Row:
449
 Row Count:
128
 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 propose to observe a sample of 50 nearby (z<0.037) AGN in order to measure the dual AGN fraction in the small-separation regime, where current angular resolution limits have prevented systematic analyses. We will analyze the sample with BAYMAX, a tool we've developed that uses a Bayesian framework to quantitatively evaluate whether a given source in a Chandra observation is a single or dual point source for separations <0.5''. We plan to combine this sample with archival observations of 36 AGN to constrain, for the first time, the nearby dual AGN fraction. The outcome of this study will be a measurement of the local dual AGN fraction, to within 2.8%, at smaller limiting separations (14-260 pc) than has ever been done before.

psci Run:
250
 Processing Date:
Jun 4 2021
 psci Directory:
/nfs/maaxnew/r3/fa/acis115e/acis115.log
OBSID:
23716
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
704128
 Target Name:
WISEAJ213202.20
 AO:
22
Start VCDU:
22882:056
 Start Time (UTC):
137:59767.740
 Stop Time (UTC):
137:61838.875
 Kilosecs:
2.1
 % Frames:
100.0
 # CCDs:
S1
# Frames:
4696
 # Events:
7371
 Events/sec:
3
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-114.7
Parameter Block:
0x008fc014
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te3x3
 BEP Mode:
F
 Start Row:
448
 # Rows:
128
Primary Exposure:
4
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
250

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