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OBSID:
25177
 Title:
CHANDRA ToO OBSERVATIONS OF NEW SWIFT DEEP GALACTIC PLANE SURVEY (DGPS) SOURCES 
Investigator:
Kouveliotou
 Observer:
O'Connor, Brendan
 Phone:
4133364343
 Email:
oconnorb@gwu.edu
Target Name:
DGPS J172051.4-374340
 Sequence Number:
503300
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_00866B
 Raster Scan:
N
 Annotated DOT:
FEB2423a

Proposal Number:
23500070
 Right Ascension:
260.214
 Declination:
-37.7278
 Status:
archived
 Start Date:
2023-02-24 20:58:30
Category:
SN, SNR AND ISOLATED NS
 Type:
TOO
 AO Cycle:
23
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.045
 Order-1 Count Rate:

 Exposure Time:
2.5
 Time Remaining:
2.585
 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 a ToO program in response to an ongoing Swift/XRT Deep Galactic Plane Survey. Phase-I is ~73% complete and has detected 150 sources, of which 110 are new or unclassified transients; 25% of Phase-II is approved. The surveys are aimed at mapping X-ray sources with good depth and coverage to enable source identification and multi-wavelength followups. The latter studies crucially depend on the Chandra subarcsec localization, which leads to source identification, especially in the crowded Galactic Plane. We propose 5 CXO ACIS-I (or HRC-I) SLOW ToO observations, at 2.5 ks each (total of 12.5ks), of bright sources found in the remaining part of Phase-I and/or Phase-II, which will be provided to us through private consultation.

Remarks:
In the rare exception of extremely bright sources, we will request an HRC-I observation to avoid ACIS-I saturation. We will communicate the ToO duration, details on the source brightness.

psci Run:
200
 Processing Date:
Mar 20 2023
 psci Directory:
/nfs/maaxnew/r3/fi/acis123d/acis123.log
OBSID:
25177
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
503300
 Target Name:
DGPS_J172051.4-
 AO:
23
Start VCDU:
20380:096
 Start Time (UTC):
055:76657.894
 Stop Time (UTC):
055:79255.538
 Kilosecs:
2.6
 % Frames:
100.0
 # CCDs:
I4
# Frames:
827
 # Events:
51184
 Events/sec:
19
 PSCI errors:
0
 % drops:
0.1
 Bias Errs:
0
 FP Temp:
-112.7
Parameter Block:
0x00866024
 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:
200

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