ToO Information

Request ID: 57078
Request Type: NEW
ToO Urgency: WITHIN A WEEK
Proposal ID:

Target Info

Target Name: SCO X-1
Target No.:
Category: X-RAY BINARIES
Coordinates[J2000]: (244.97946, -15.64028)
Exp (ks): 10
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: 2025-07-03 03:00 UTC
End: 2025-07-03 06:20 UTC
Remarks: Our Gemini observations are scheduled for 03:00-06:20 on July 03 UTC (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's Alopeke and Zorro instruments will enable us to explore such variability on sub-second timescales. Simultaneous coverage with NICER will then allow us to directly link accretion-induced X-ray and optical variability in our targets.

Uninterrupted: N

Justification:

Estimated Count Rate (cts s-1): 18000.000

Requester Information

Name: DR. ALEXANDRA JEAN TETARENKO

Status

Request Date (UTC): 2025-06-25 19:54:30
Disposition: Rejected

Date: 2025-07-14 15:19:45.467753
Reason: NICER pointing anomaly
Person:

Status: Unable to Execute

Date: 2025-07-14 15:19:45.467753
Person:

Misc

Note:

Target Details

Nearest Target No: 7059
Nearest Taget Name: Sco_X-1
Separation (arcmin): 0.0000
Nearby Target (<3.0'): 1990[Sco_X-1],7059[Sco_X-1]
Referenced Target Catalogue: /Home/eud/nicerweb/too/ags/NICER2_Xray_Target_List_V43o.csv.gz
Sun Angle: 151.2 deg at 2025:176:19:55:41 (UTC), 138.0 deg after 2 weeks

Planned Observations

AGS6 Reference:
Planned Snapshots:

Observation Start	Observation End	Span	Mode	Observation ID
(YYYY-DDDTHH:MM:SS)	(YYYY-DDDTHH:MM:SS)	(seconds)	Man/Opt

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