Goddard Space Flight Center and Southwest Research Institute logos + View the NASA Portal
Home > Researchers > IBEX Data Releases

IBEX Data Releases

Public Data

IBEX uses the Earth's orbital motion and repointing of the spacecraft to make periodic full maps of ENAs from the heliosphere. The IBEX Science Team will release data related to these new maps as soon as they are validated. The data and documentation for them can be found on links on this page.

Descriptions of the IBEX mission and sensors published in Space Science Reviews can be downloaded here:

Please note: IBEX sky maps, calibration data, and other products posted here are continually evolving and being improved as we learn more and improve our analysis techniques. The IBEX team is delighted to work with outside scientists who want to work with IBEX data; we urge you to email us at ibex_datareleases@lists.sr.unh.edu and collaborate directly with the IBEX Science Team.

Data Release 1

Time Series Data
The Time Series data files contain the count rates seen by the IBEX sensors in both direct event (DE) and histogram (HB) modes. The documentation file explains the details.
The Time Series data can be accessed by clicking here.
Map Data
The IBEX Map data files plot the IBEX Hi and Lo flux rates onto the celestial sphere, in J2000 ecliptic coordinates. The flux maps are sums over a six-month period (orbits 9-31) and are broken out by sensor energy band (Hi bands 2-6, Lo bands 5-7).
Also included are plots of Hydrogen and Oxygen rates based on time-of-flight measurements.
The Maps data can be accessed by clicking here.
Calibration Data
The Calibration Data files give all information about the IBEX sensors required to understand the collected data. The calibration data can be accessed by clicking here. The documentation file explains the details.

Data Release 2

The IBEX second data release consists of maps of the heliosphere in two epochs, plus maps made from the combination of the two epochs. The data release also contains a preprint of McComas et al. 2010, "The evolving outer heliosphere: Large-scale stability and time variations observed by the Interstellar Boundary Explorer".

The maps provided in the second data release were made using data taken taken with the IBEX Hi sensor in its energy bands 2 through 6. The first epoch's maps, found in directories Map1 and Map1_CG, were made using data from orbits 11 through 33 (December 2008 through June 2009); the second epoch's maps, found in directories Map2 and Map2_CG, were made using data from orbits 34 through 56 (June 2009 through December 2009). The combined maps were made with data from orbits 11 through 56.

The IBEX second data release can be accessed by clicking here.

Data Release 3

The IBEX third data release contains data used in the publication of Moebius et al., 2012, "Interstellar Gas Flow Parameters Derived from IBEX-Lo Observations in 2009 and 2010 - Analytical Analysis" and Bzowski et al., 2012, "Neutral interstellar helium parameters based on IBEX-Lo observations and test particle calculations". The data are the 6 degree resolution corrected histogram data and the observation time periods in one csv file for each orbit for both the angular fit analysis and the count rate analysis.

The IBEX third data release can be accessed by clicking here.

Data Release 4

The IBEX fourth data release contains data used in the publication of McComas et al., 2012, "The First Three Years of IBEX Observations and Our Evolving Heliosphere".

IBEX results, together with in situ observations from the Voyager-1 and -2 spacecraft currently in the inner heliosheath, other supporting observations from several spacecraft, and a broad theory and modeling effort are producing a revolutionary new understanding of the outer heliosphere and its interactions with the local interstellar medium. In this release, we provide new ENA observations from IBEX, covering its first, second and third years of science operations.

The following are available:

Mariner 10

Hydrogen Ly-alpha backscattered emision and Helium 584A backscattered solar emission from Roll Control Maneuver #7 of Mariner 10.

The following are available:
  • The rcm7 data file
  • rcm7.diff release and data layout description
  • Download the tar file
  • Main papers describing scientific results of data analysis:
    • a) Ajello, J.~M., "An interpretation of Mariner 10 helium (584 A) and hydrogen (1216 A) interplanetary emission observations", Astrophysical Journal, vol. 222, pp 1068-1079, 1978 doi=10.1086/156224
    • b) Ajello, J.~M. and Witt, N. and Blum, P.~W., "Four UV observations of the interstellar wind by Mariner 10 - Analysis with spherically symmetric solar radiation models", Astrophysical Journal, volume 73, pp260-271, 1979

Data Release 6

The IBEX sixth data release contains data and related information connected with the publication of Schwadron et al., 2014, "SOLAR RADIATION PRESSURE AND LOCAL INTERSTELLAR MEDIUM FLOW PARAMETERS FROM INTERSTELLAR BOUNDARY EXPLORER LOW ENERGY HYDROGEN MEASUREMENTS".


Neutral hydrogen atoms that travel into the heliosphere from the local interstellar medium (LISM) experience strong effects due to charge exchange and radiation pressure from resonant absorption and re-emission of Lya. The radiation pressure roughly compensates for the solar gravity. As a result, interstellar hydrogen atoms move along trajectories that are quite different than those of heavier interstellar species such as helium and oxygen, which experience relatively weak radiation pressure. Charge exchange leads to the loss of primary neutrals from the LISM and the addition of new secondary neutrals from the heliosheath. IBEX observations show clear effects of radiation pressure in a large longitudinal shift in the peak of interstellar hydrogen compared with that of interstellar helium. Here, we compare results from the Lee et al. interstellar neutral model with IBEX-Lo hydrogen observations to describe the distribution of hydrogen near 1 AU and provide new estimates of the solar radiation pressure. We find over the period analyzed from 2009 to 2011 that radiation pressure divided by the gravitational force (µ) has increased slightly from µ = 0.94 ± 0.04 in 2009 to µ = 1.01 ± 0.05 in 2011. We have also derived the speed, temperature, source longitude, and latitude of the neutral H atoms and find that these parameters are roughly consistent with those of interstellar He, particularly when considering the filtration effects that act on H in the outer heliosheath. Thus, our analysis shows that over the period from 2009 to 2011, we observe signatures of neutral H consistent with the primary distribution of atoms from the LISM and a radiation pressure that increases in the early rise of solar activity.

The following are available:

Data Release 7

The Interstellar Boundary Explorer (IBEX) returned its first five years of scientific observations from 2009 to 2013. In this release, we provide the backing data for the paper "McComas et al., 2014 ApJS, IBEX - the first five years (2009-2013)" in which are examined, validated, initially analyzed, and which provide to the broad scientific community a complete set of energetic neutral atom (ENA) observations for the first time. IBEX measures the fluxes of ENAs reaching 1 AU from sources in the outer heliosphere and most likely the very nearby interstellar space beyond the heliopause. The data, maps, and documentation provided in this release represent the fourth major release of the IBEX data (known as Data Release 7), incorporate important improvements, and should be used for future studies and as the citable reference for the current version of the IBEX data. In this study, we also examine five years of time evolution in the outer heliosphere and the resulting ENA emissions. These observations show a complicated variation with a general decrease in ENA fluxes from 2009 to 2012 over most regions of the sky, consistent with a 2–4 year recycle time for the previously decreasing solar wind flux. In contrast, the heliotail fluxes continue to decrease, again consistent with a significantly more distant source in the downwind direction. Finally, the Ribbon shows the most complicated time variations, with a leveling off in the southern hemisphere and continued decline in the northern one; these may be consistent with the Ribbon source being significantly farther away in the north than in the south. Together, the observations and results shown in this release expose the intricacies of our heliosphere’s interaction with the local interstellar medium.The following are available:

NASA Principal Investigator: Dave McComas
E/PO Lead: Lindsay Bartolone
Webmasters: Wendy Mills & Georgina Avalos
Last Updated: 6 June 2014
+ Contact Us