This data set is from the IBEX-Hi Release 12 Count Data for Magnetospheric Imaging. This release provides data for various IBEX orbits from orbit 23 which started on 2009-03-26 to orbit 207b which ended on 2013-05-30. The data include 21 orbits from IBEX-Hi 6° histogram ENA count data, which is primarily what have been used in IBEX magnetospheric studies. The Interstellar Boundary Explorer, IBEX, has operated in space since 2008 updating our knowledge of the outer heliosphere and its interaction with the local interstellar medium. Start-time: 2008-12-25. There are currently 14 releases of IBEX ENA-Hi and/or IBEX ENA-Lo data covering 2009-2018. The data consist of IBEX-Hi Count Data for Magnetospheric Imaging during instrument pointing in spin angle from 0° to 360° between the north and south Ecliptic poles. A spin angle equal to 0° corresponds to the north Ecliptic pole. Counts come from IBEX-Hi energy band 2 through 6: +-----------------------------------------------------+ Energy Band Center Energy Energy Range ----------------------------------------------------- Channel 2 ~0.71 keV 0.52 keV to 0.95 keV Channel 3 ~1.11 keV 0.84 keV to 1.55 keV Channel 4 ~1.74 keV 1.36 keV to 2.50 keV Channel 5 ~2.73 keV 1.99 keV to 3.75 keV Channel 6 ~4.29 keV 3.13 keV to 6.00 keV +-----------------------------------------------------+ Background counts have not been removed. Counts are separated into 6° latitudinal bins, with each angle label representing the center of the bin. Details of the data and enabled science from Release 12 are given in the following journal publications: McComas et al. 2011, 2012b; Fuselier et al. 2010, 2015; Petrinec et al. 2011; Ogasawara et al. 2013, 2019; and Dayeh et al. 2015. Data Location: http://ibex.swri.edu/ibexpublicdata/Data_Release_12/index.html. Contact: Maher Dayeh, Southwest Research Institute, San Antonio, TX, e-mail: maldayeh@swri.edu. +-----------------------------------------------------------+ Orbit Start Date/Time End Date/Time ----------------------------------------------------------- 23 2009-03-26T21:09:00.318 2009-04-03T16:07:51.743 24 2009-04-03T12:10:21.253 2009-04-11T08:15:09.669 25 2009-04-11T05:06:40.967 2009-04-18T22:05:11.125 27 2009-04-26T08:27:40.916 2009-05-04T05:31:06.519 28 2009-05-04T02:02:57.673 2009-05-11T21:13:47.596 29 2009-05-11T17:27:02.484 2009-05-19T19:27:18.831 51 2009-10-26T08:19:34.905 2009-11-03T02:38:01.730 52 2009-11-02T22:34:07.792 2009-11-10T19:03:55.230 53 2009-11-10T15:46:22.161 2009-11-18T10:58:17.674 55 2009-11-25T23:44:19.069 2009-12-03T11:26:37.151 56 2009-12-03T08:22:31.792 2009-12-10T22:03:52.604 57 2009-12-10T18:55:33.969 2009-12-18T06:58:47.247 72 2010-04-04T11:17:28.386 2010-04-12T09:13:51.008 74 2010-04-19T14:09:01.851 2010-04-27T03:44:14.913 77 2010-05-12T01:33:51.796 2010-05-19T20:43:01.583 78 2010-05-19T17:33:48.047 2010-05-27T13:02:03.396 103 2010-11-26T07:56:05.324 2010-12-04T04:11:44.879 187a 2012-11-21T00:17:13.430 2012-11-25T00:40:26.707 188b 2012-12-03T12:46:18.859 2012-12-08T00:44:50.846 206a 2013-05-13T23:15:27.433 2013-05-17T12:19:58.215 207b 2013-05-26T12:21:08.868 2013-05-30T23:14:44.989 +-----------------------------------------------------------+ For the first two and a half years of science operations, which corresponds to from Orbit 1 through Orbit 127), the IBEX orbital period was approximately 7.5 days and the spin axis was repointed once each orbit around perigee, leading to bands of sky viewing centered 7.5° apart. In June 2011, over Orbits 128 and 129, IBEX was maneuvered into a previously unknown, long-term stable lunar synchronous orbit with apogee still close to 50 Earth radii (McComas et al. 2011a). Since then, the IBEX orbital period has been approximately 9.1 days, which is one third of the lunar sidereal period of 27.3 days. Orbit numbers from 130 onward are split into two segments, 'a' and 'b'. Furthermore, starting in orbit segment 184a, the IBEX team modified the IBEX-Hi energy step sequence and eliminated the lowest energy step, ESA1, in exchange for doubling the statistical sampling of ESA3, center energy ~1.1 keV.