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OBSID:
29488
 Title:
Joint HETGS/XRISM observation of NGC 3783       
Investigator:
Kaastra
 Observer:
Gu, Liyi
 Phone:
+31887775712
 Email:
l.gu@sron.nl
Target Name:
NGC 3783
 Sequence Number:
704845
 Instrument:
ACIS-S
 Grating:
HETG
 SI Mode:
TE_00958B
 Raster Scan:
N
 Annotated DOT:
JUL2624a

Proposal Number:
24700510
 Right Ascension:
174.757
 Declination:
-37.7386
 Status:
archived
 Start Date:
2024-07-26 04:16:05
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
GTO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
1.1
 Order-1 Count Rate:
0.8
 Exposure Time:
20
 Time Remaining:
19.566
 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:
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:
We propose to observe NGC 3783 with the HETGS for 175 ks, distributed over a two month interval around the planned XRISM PV observation of this source. The XRISM observation (200 ks) will characterise the various outflow components with high accuracy. The HETGS observations will effectively extend the length of the observation by more than an order of magnitude. Variability, in particular of the 1-2 keV Fe-L complex, helps to constrain the density of each component and thereby its location.

Remarks:
XRISM will observe NGC 3783 either between May 26 - Aug 14, 2023 or between Nov 26, 2023 - Feb 10, 2024. XRISM has 200 ks (spanning ~ 5 days). We would like to have the Chandra observations spread over ~60 days with the XRISM observation in that 60 days interval. The Chandra observation should be preferentially splitted into smaller chunks during that 60 day interval with no preferred duration or spacing, allowing optimal mission planning for Chandra, as long as the XRISM observation is within the window and the span is about 60 days. No real simultaneity with XRISM required. Revised/added constraint, approved by CDO: place about 95 ks within XRISM observing window.

psci Run:
24
 Processing Date:
Aug 11 2024
 psci Directory:
/nfs/maaxnew/r3/fn/acis128a/acis128.log
OBSID:
29488
 SIM Mode:
ACIS-S
 OTG Mode:
HETG
 Seq Number:
704845
 Target Name:
NGC_3783
 AO:
24
Start VCDU:
72326:008
 Start Time (UTC):
208:16901.655
 Stop Time (UTC):
208:36479.547
 Kilosecs:
19.6
 % Frames:
100.0
 # CCDs:
S4
# Frames:
6233
 # Events:
449776
 Events/sec:
22
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-117.7
Parameter Block:
0x00958024
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te3x3
 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:
24

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