The LMXB NS GS 1826 - 238 was discovered by Ginga in 1988 September .
Due to the presence of quasi-periodicity in the type I X-ray burst rate , the source has been a frequent target of X-ray observations for almost 30 years .
Though the bursts were too soft to be detected by INTEGRAL /SPI , the persistent emission from GS 1826 - 238 was detected over 150 keV during the \sim 10 years of observations .
Spectral analysis found a significant high-energy excess above a Comptonization model that is well fit by a power law , indicating an additional spectral component .
Most previously reported spectra with hard tails in LMXB NS have had an electron temperature of a few keV and a hard tail dominating above \sim 50 keV with an index of \Gamma \sim 2 - 3 .
GS 1826 - 238 was found to have a markedly different spectrum with kT _ { e } \sim 20 keV and a hard tail dominating above \sim 150 keV with an index of \Gamma \sim 1.8 , more similar to BHXRB .
We report on our search for long-term spectral variability over the 25 - 370 keV energy range and on a comparison of the GS 1826 - 238 average spectrum to the spectra of other LMXB NS with hard tails .