For Scientists: The Long-Term Plan


This is the current Year-1 Long-Term Plan (LTP) for IXPE, assuming a 2021-Dec-09 launch. The Science Advisory Team also requested transient targets to be added when and if they become bright. At such time, the LTP will be adjusted, attempting to minimize the impact on the overall plan; however, nothing is guaranteed. The current LTP can accommodate the addition of approximately a half-dozen transients. Should there be a lack of transients in the coming year, additional time and/or targets will be added to the plan.

IXPE is telemetry limited for bright sources and this requires that observations be handled slightly differently from the way most X-ray missions operate. If IXPE is observing a bright source that could potentially fill on-board storage, we shall divide the observation into multiple segments.

COLUMNS:

SG: This is a segment number. If it is zero, then the observation has not been segmented.

Name: This is a common name for the target.

Start: The Year-Month-Day the observation will begin. The observations ends just before the next target begins.

buffer: This is an estimate as to how much data will stll be on the spacecraft when the observation ends in MB. The on-board storage can hold just over 5500 MB and when planning we keep this number below 4000 MB.

SG NameStart buffer
0Cas A2022-01-11 0.0
0Cen X-32022-01-31 299.8
14U 0142+612022-02-03 0.0
0Cen A2022-02-15 0.0
1Her X-12022-02-17 0.0
1Crab2022-02-22 3023.2
2Her X-12022-02-23 2846.6
24U 0142+612022-02-25 1199.8
1Sgr A complex2022-03-05 174.3
2Crab2022-03-10 3201.9
0Mrk 5012022-03-11 2862.4
2Sgr A complex2022-03-14 0.0
0Mrk 5012022-04-02 0.0
0GS 1826-2382022-04-04 8.3
0S5 0716+7142022-04-06 0.0
0GRS 1915+1052022-04-12 0.0
0Vela Pulsar2022-04-19 0.0
0Mrk 4212022-05-11 486.5
0Cyg X-12022-05-14 2620.6
0MCG-5-23-162022-05-21 113.5
0Vela X-12022-06-02 2552.4
0BL Lac2022-06-09 646.6
03C 454.32022-06-18 143.9
03C 2732022-06-20 0.0
0Mrk 5012022-06-23 0.0
0Cyg X-22022-06-25 1670.7
03C 2792022-06-27 1164.5
0Cen A2022-06-30 1066.7
0GX 301-22022-07-02 39.7
0Tycho2022-07-08 0.0
0MSH15-522022-07-27 0.0
0X Persei2022-08-27 0.0
01RXS J170849.02022-09-02 0.0
0GX9+92022-09-26 4086.2
04U 1626-672022-09-28 0.0
01ES 1959+6502022-10-02 0.0

NOTES

ToOs will cause planned times to shift around. Plan only covers time up to the end of Sep.

Currently the plan does not include observations of J0211+1051, Mrk 421, 3C 345.3, 3C 273, 3C 279, 1ES 1959+650, IC 4329A, Circinus galaxy, and SN 1006. These will be added as the year progresses.

If needed the observation of MCG-5-23-16 will be segmented to adjust the timing of Cyg X-1. This will be done to facilitate coordinated observations with XL-Calibur.

+ NASA Privacy, Security, Notices | Last Updated: January 22, 2022 | Author/Curator: Mitzi Adams, mitzi.adams @ nasa.gov