ToO Information
Request ID: 54135
Request Type: NEW
ToO Urgency: NEXT DAY
Proposal ID:
Target Info
Target Name: 4U 1755-338
Target No.: 5106
Category: X-RAY BINARIES
Coordinates[J2000]: (269.66667, -33.80750)
Exp (ks): 40
Extended: N
Extent Size:
Background Restriction: N
Remarks:
Constraint Details
Monitor: N
Criteria:
Phase Dependent: N
Epoch:
Period:
Min:
Max:
Remarks:
Specific Time: Y
Start: 2025-03-31 00:00 UTC
End: 2025-04-02 00:00 UTC
Remarks: We propose this ToO as simultaneous observation with AstroSat. As AstroSat will be observing 4U 1755-338 from 2025-03-31 (06:23:13.0): MJD=60765.0000 to 2025-04-02 (14:49:59.0): MJD=60767.0000.
ToO: Y
Coordinate Observation: Y
Observatory: ASTROSAT
Description: A joint NICER and AstroSat observation can strengthen the results, as both the detectors have excellent timing resolution and provide a broad-band spectral study, which can help to understand accretion dynamics and spectral changes, providing crucial insights into this black hole candidate's behavior.
Uninterrupted: N
Justification:
Estimated Count Rate (cts s-1): 700.000
Requester Information
Name: MR. ARBIND PRADHAN
Status
Request Date (UTC): 2025-03-30 08:10:54
Disposition: Accepted
Date: 2025-03-31T22:15:07
Reason:
Person: Auto
Status: Complete
Date: 2025-04-03 13:42:53.087272
Person:
Misc
Note:
Target Details
Nearest Target No: 6602
Nearest Taget Name: H_1755-338
Separation (arcmin): 0.0362
Nearby Target (<3.0'): 5106[H_1755-338],6602[H_1755-338]
Referenced Target Catalogue: /Home/eud/nicerweb/too/ags/NICER2_Xray_Target_List_V42x.csv.gz
Sun Angle: 102.1 deg at 2025:091:21:40:53 (UTC), 115.6 deg after 2 weeks
Planned Observations
AGS6 Reference: AGS6_STSCH_schedule_20250901800_20251021200_V01.txt.gz,AGS6_STSCH_schedule_20250911800_20251030000_V01.txt.gz,AGS6_STSCH_schedule_20250921900_20251071453_V01.txt.gz
Planned Snapshots:
| Observation Start |
Observation End |
Span |
Mode |
Observation ID |
| (YYYY-DDDTHH:MM:SS) |
(YYYY-DDDTHH:MM:SS) |
(seconds) |
Man/Opt |
|
| 2025-091T01:22:27 |
2025-091T01:42:00 |
1173 |
Mandatory |
99999999 |
| 2025-091T07:38:54 |
2025-091T07:54:00 |
906 |
Mandatory |
99999999 |
| 2025-091T12:24:40 |
2025-091T12:32:40 |
480 |
Mandatory |
99999999 |
| 2025-091T13:49:34 |
2025-091T14:05:40 |
966 |
Mandatory |
99999999 |
| 2025-091T18:34:42 |
2025-091T18:44:20 |
578 |
Mandatory |
99999999 |
| 2025-091T21:42:39 |
2025-091T21:50:00 |
441 |
Mandatory |
99999999 |
| 2025-091T23:02:18 |
2025-091T23:22:20 |
1202 |
Mandatory |
99999999 |
| 2025-092T05:24:47 |
2025-092T05:34:20 |
573 |
Mandatory |
99999999 |
| 2025-092T09:53:11 |
2025-092T10:13:00 |
1189 |
Mandatory |
99999999 |
| 2025-092T11:37:59 |
2025-092T11:46:00 |
481 |
Mandatory |
99999999 |
| 2025-092T13:10:39 |
2025-092T13:19:00 |
501 |
Mandatory |
99999999 |
| 2025-092T14:41:22 |
2025-092T14:52:00 |
638 |
Mandatory |
99999999 |
Visibility
AGS3 Reference:
Visibility Report:
| Target Name |
Target ID |
Visibility Start |
Visibility End |
Span |
Initial |
Final |
Relative |
|
|
(YYYY-DDDTHH:MM:SS) |
(YYYY-DDDTHH:MM:SS) |
(seconds) |
Interference |
Interference |
Orbits |