For Scientists: The Long-Term Plan


This is the current Long-Term Plan (LTP) for IXPE. The Science Advisory Team requested that transient targets 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.

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.

RA: Target RA in decimal degrees.

Dec: Target Dec in decimal degrees.

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 Name RA Dec Start buffer
0 1RXS J170849 257.195 -40.1482022-09-19 0.0
0 XTE 1701-46 255.244 -46.1852022-09-29 0.0
0 1RXS J170849 257.195 -40.1482022-09-30 0.0
0 XTE 1701-46 255.244 -46.1852022-10-08 0.0
0 GX9+9 262.934 -16.9612022-10-09 2926.8
0 4U 1820-303 275.919 -30.3612022-10-11 2220.9
1 Cyg X-3 308.107 40.9582022-10-13 3722.7
0 LMC X-1 84.912 -69.7432022-10-19 2606.2
0 1ES1959+65 299.999 65.1492022-10-28 1774.7
2 Cyg X-3 308.107 40.9582022-10-31 3276.5
1 MCG-5-23-16 146.917 -30.9492022-11-06 1401.2
0 GRO J1008-57 152.446 -58.2932022-11-13 1384.2
2 MCG-5-23-16 146.917 -30.9492022-11-14 446.6
0 GRO J1008-57 152.446 -58.2932022-11-18 426.5
3 MCG-5-23-16 146.917 -30.9492022-11-20 0.0
0 GRO J1008-57 152.446 -58.2932022-11-23 0.0
1 Mrk421 166.114 38.2092022-11-27 0.0
0 Vela X-1 135.529 -40.5552022-11-30 0.0
2 Mrk421 166.114 38.2092022-12-06 0.0
0 NGC 4151 182.636 39.4062022-12-08 0.0
0 Tycho 6.325 64.1382022-12-21 0.0
0 Mrk501 253.468 39.7602022-12-25 0.0
1 PSR B0540-69 85.045 -69.3322022-12-27 0.0
0 IC4329A 207.330 -30.3092023-01-05 0.0
1 1ES 0229+200 38.203 20.2882023-01-15 0.0
0 Her X-1 254.458 35.3422023-01-18 0.0
2 PSR B0540-69 85.045 -69.3322023-01-21 0.0
2 1ES 0229+200 38.203 20.2882023-01-26 0.0
1 PG1553+113 238.929 11.1902023-02-01 0.0
0 Her X-1 254.458 35.3422023-02-03 0.0
2 PG1553+113 238.929 11.1902023-02-08 0.0
0 Mrk501 253.468 39.7602023-02-12 0.0
1 MSH 15-52 228.481 -59.1362023-02-14 0.0
1 Crab 83.633 22.0142023-02-21 3845.8
0 Her X-1 254.458 35.3422023-02-23 3489.8
2 MSH 15-52 228.481 -59.1362023-02-26 1766.6
NOTES:
Plan only covers time up to the beginning of March 2023.
ToOs will cause planned times to shift around.
+ NASA Privacy, Security, Notices | Last Updated: September 21, 2022 | Author/Curator: Mitzi Adams, mitzi.adams @ nasa.gov