https://spdf.gsfc.nasa.gov/pub/data/ibex/release15/IBEX15_README.txt


Data Release 15 description:

Maps are in a ribbon centered frame. Data are Compton-Getting and Survival Probability corrected.
Centers for different energies are as follows (following Funsten et al. 2013):
Map Centers for each energy (in eclipticJ2000; [lon,lat]):
ESA2 ribbon center : b_lon_lat_ec = [218.5, 43.1]
ESA3 ribbon center : b_lon_lat_ec = [220.3, 40.5]
ESA4 ribbon center : b_lon_lat_ec = [219.6, 39.8]
ESA5 ribbon center : b_lon_lat_ec =  [217.9, 37.7]
ESA6 ribbon center : b_lon_lat_ec = [214.2, 32.4]

Each folder contains the skymap data for a particular energy, along with the associated variance. 
For convenience, a skymap flux plot is also included.

Combined maps information:
"years 123" refers to 2009, 2010, 2011
"years45" refers to 2012, 2013
"years67" refers to 2014, 2015
"years89" refers to 2016, 2017
For instance, "ribcen_esa5_hvset_tabular_cg_single_years45" contains data for combined years 2012 and 2013 at ESA 5