ToO Information
Request ID: 53900
Request Type: NEW
ToO Urgency: WITHIN A WEEK
Proposal ID:
Target Info
Target Name: 4U 1608-52
Target No.: 1975
Category: X-RAY BINARIES
Coordinates[J2000]: (243.17900, -52.42380)
Exp (ks): 30
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: 2025-03-10 05:29 UTC
End: 2025-03-14 08:49 UTC
Remarks: Our Gemini observations are scheduled for 05:30-08:50 UT on March 10, 12, and 14 (weather permitting).
ToO: Y
Coordinate Observation: Y
Observatory: GEMINI
Description: We are aiming to characterize optical variability in X-ray binaries. The fast timing capabilities of Gemini 'Alopeke and Zorro instruments will enable us to explore such variabilities on sub-second timescales. Simultaneous coverage with NICER will enable us to directly link accretion-induced X-ray and optical variability.
Uninterrupted: N
Justification:
Estimated Count Rate (cts s-1): 1500.000
Requester Information
Name: DR. ARASH BAHRAMIAN
Status
Request Date (UTC): 2025-03-06 00:46:34
Disposition: Accepted
Date: 2025-03-11T17:10:10
Reason:
Person: Auto
Status: Complete
Date: 2025-03-17 18:59:32.514220
Person:
Misc
Note:
Target Details
Nearest Target No: 1975
Nearest Taget Name: 4U_1608-522
Separation (arcmin): 0.0426
Nearby Target (<3.0'): 1975[4U_1608-522]
Referenced Target Catalogue: /Home/eud/nicerweb/too/ags/NICER2_Xray_Target_List_V42q.csv.gz
Sun Angle: 101.7 deg at 2025:074:15:53:30 (UTC), 113.4 deg after 2 weeks
Planned Observations
AGS6 Reference: AGS6_STSCH_schedule_20250701600_20250841200_V03.txt.gz,AGS6_STSCH_schedule_20250711400_20250841200_V01.txt.gz,AGS6_STSCH_schedule_20250711700_20250861200_V02.txt.gz,AGS6_STSCH_schedule_20250722058_20250811000_V02.txt.gz,AGS6_STSCH_schedule_20250731800_20250881200_V02.txt.gz,AGS6_STSCH_schedule_20250741200_20250881200_V01.txt.gz,AGS6_STSCH_schedule_20250741500_20250881200_V01.txt.gz,AGS6_STSCH_schedule_20250760000_20250881200_V02.txt.gz
Planned Snapshots:
| Observation Start |
Observation End |
Span |
Mode |
Observation ID |
| (YYYY-DDDTHH:MM:SS) |
(YYYY-DDDTHH:MM:SS) |
(seconds) |
Man/Opt |
|
| 2025-071T06:07:20 |
2025-071T06:20:40 |
800 |
Mandatory |
99999999 |
| 2025-071T07:40:20 |
2025-071T07:53:20 |
780 |
Mandatory |
99999999 |
| 2025-071T09:13:40 |
2025-071T09:26:20 |
760 |
Mandatory |
99999999 |
| 2025-081T05:37:20 |
2025-081T05:54:20 |
1020 |
Mandatory |
99999999 |
| 2025-081T07:10:20 |
2025-081T07:27:20 |
1020 |
Mandatory |
99999999 |
| 2025-081T08:43:20 |
2025-081T09:00:40 |
1040 |
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 |