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We present our near-infrared (NIR) imaging observations of two neutron starlow mass X-ray binaries XMMU J174716.1-281048 and SAX J1806.5-2215 obtainedusing the PANIC instrument on the 6.5-meter Magellan telescope and the WHIRCinstrument on the 3.5-meter WIYN telescope respectively. Both sources aremembers of the class of faint to very-faint X-ray binaries and undergo verylong X-ray outburst, hence classified as `quasi persistent X-ray binaries'.While XMMU J174716.1-281048 was active for almost 12 years between 2003 and2015, SAX J1806.5-2215 has been active for more than 5 years now since 2011.From our observations, we identify two NIR stars consistent with the ChandraX-ray error circle of XMMU J174716.1-281048. The comparison of our observationswith the UKIRT Galactic plane observations taken during the same outburst,color-color diagram analysis and spectral energy distribution suggest that bothstars are probably a part of the field population and are likely high massstars. Hence possibly neither of the two stars is a true NIR counterpart. Forthe faint X-ray binary SAX J1806.5-2215 during its current outburst, wedetected a NIR star in our K band WIYN observations consistent with its Chandraerror circle. The identified NIR star was not detected during the UKIRTobservations taken during its quiescent state. The comparison of twoobservations suggest that there was an increase in flux by at least onemagnitude of the detected star during our observations, hence suggests thedetection of the likely counterpart of SAX J1806.5-2215.

A search for near-infrared counterparts of two faint neutron star X-ray transients : XMMU J174716.1-281048 and SAX J1806.5-2215