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Swift Target of Opportunity Request Summary

Below we summarize details for a given TOO request. Note not all details of the TOO request are made public.

TOO request for GX 339-4


Time Submitted2024-05-02 17:19:24
UrgencyMedium Urgency (days to a week)
Object NameGX 339-4
Type or ClassificationX-Ray Transient
Right Ascension (J2000)255.70578 (= 17h 02m 49.0s)
Declination (J2000)-48.78975 (= -48° 47' 23.0'')
Position Error (90% confidence - arcminutes)0
Science Justification
Exposure Time per Visit (s)1000
Number of Visits7
Total Exposure (s)7000
Immediate Objective
XRT ModeAuto
UVOT Mode0x9999: Default (Filter of the day)
Primary Target ID16552

Below are tentative scheduling windows for this ToO request. Note that the 'Observed Time' is just an approximation for your convenience and may not be complete. Please check the online version of the Swift schedule for the full listing of observed times.

#Window StartWindow StopXRT
Exposure (s)Observed
Time (s)
12024-05-09 00:00:002024-05-10 00:00:00PC0x99991000970
22024-05-11 00:00:002024-05-12 00:00:00PC0x999910000
32024-05-13 00:00:002024-05-14 00:00:00PC0x99991000355
42024-05-15 00:00:002024-05-16 00:00:00PC0x99991000825
52024-05-17 00:00:002024-05-18 00:00:00PC0x99991000860
62024-05-19 00:00:002024-05-20 00:00:00PC0x999910000
72024-05-21 00:00:002024-05-22 00:00:00PC0x999910000

Swift Mission Operations Center

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Swift MOC Team Leads

Mission Director: John Nousek
Science Operations: Jamie Kennea
Flight Operations: Mark Hilliard
UVOT: Michael Siegel
XRT: Jamie Kennea