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OBSID:
27451
 Title:
Ultra-Deep Chandra Monitoring of the JWST-NEP Time Domain Field   
Investigator:
Maksym
 Observer:
Maksym, Walter
 Phone:
+1-224-766-1624
 Email:
walter.p.maksym@nasa.gov
Target Name:
JWST-DTDF-1
 Sequence Number:
901442
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_0046CB
 Raster Scan:
N
 Annotated DOT:
SEP1922a

Proposal Number:
22900038
 Right Ascension:
260.7
 Declination:
65.8226
 Status:
archived
 Start Date:
2022-09-25 20:10:08
Category:
EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
 Type:
GO
 AO Cycle:
22
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.01
 Order-1 Count Rate:

 Exposure Time:
9
 Time Remaining:
9.263
 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 S3
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:
The JWST Deep Time Domain Field (DTDF) is a Guaranteed Time Observation (GTO) field with 46 JWST Cycle 1 GTO hours in JWST's continuous viewing zone. It will be the deepest possible counterpart to Chandra and the optimal community field for time domain studies with large cosmic lookback volume (z>6), enabled by the unprecedented capabilities of JWST. DTDF enables a powerful synergy with Chandra, the only X-ray instrument matching JWST resolution. We request 900 ks to double DTDF to 1.8 Ms depth (approaching CDF-N, but with guaranteed deep JWST data) and begin regular monitoring for DTDF transients and variables at or before the start of the JWST GTO program.

Remarks:
There is a window constraint only for the first visit of this target. Monitoring should begin between 2021 August 15 and 2021 November 15 regardless of JWST launch (to ensure the success of the field-building program in the event of launch slippage beyond current considerations). Subsequent visits should follow the monitoring schedule described in the 'observing time' section of this form. It is our understanding that a limited amount resource cost points may be drawn from Cycles 23 and 24 as appropriate for multi-cycle programs.

psci Run:
293
 Processing Date:
Oct 17 2022
 psci Directory:
/nfs/maaxnew/r3/fg/acis121e/acis121.log
OBSID:
27451
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
901442
 Target Name:
JWST-DTDF-1
 AO:
22
Start VCDU:
97627:056
 Start Time (UTC):
268:73765.150
 Stop Time (UTC):
268:83040.978
 Kilosecs:
9.3
 % Frames:
100.0
 # CCDs:
I6
# Frames:
2862
 # Events:
331615
 Events/sec:
35
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-113.6
Parameter Block:
0x0046c034
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te5x5
 BEP Mode:
F
 Start Row:
0
 # Rows:
1024
Primary Exposure:
32
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
293

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