Axil, your cut-and-paste somehow distorted the article’s intent. The .03 keV is the error bar. Here are some better plots and commentary.
https://inspirehep.net/record/1298698/plots The actual mystery emission line is centered at ~3.5 keV but optical distortion means it could be different at the source. The authors offer several possibilities but end up interpreting it as “dark matter” tentatively – while at the same time admitting that it could be noise, since the bump is so small. It looks like noise to me. BTW – we are all familiar with stepped down radiation in this spectrum as it is typical of Cerenkov Radiation, as seen in the eerie glow of spent-fuel pins in a holding tank. Yet – if not noise, this is interesting in the context of LENR in that this could be a cosmological emission line for dark matter, and dark matter could be the end-product of hydrogen shrinkage - aka the DDL. Think about “them apples”… but catch-22, dark matter is not supposed to emit, thus the “dark”. Anyway there is a direct-connect to LENR, if this emission turns out not to be noise. They also mention neutrino mass as a possibility and others, so it is wrong to get too excited over this… OTOH… The best thing about it – and the reason to keep it in mind is if LENR does eventually turn up a signal in the 3-4 keV range then we have some cosmological connection to dark matter AND, this is an emission range which could easily have gone undetected in the past 25 years of LENR research, since the photon is shielded by a steel reactor, and also could account for the glow of some electrolysis cells. PLUS.. this seems to be near a Rydberg emission line, and possibly already associated with deep level orbital redundancy. There are many hits on a google search for “3.5 keV” and other key words of interest, most behind paywalls. I hope these paywalls are not the death of a final GUT for LENR…. From: Axil Axil http://arxiv.org/pdf/1402.2301v2.pdf DETECTION OF AN UNIDENTIFIED EMISSION LINE IN THE STACKED X-RAY SPECTRUM OF GALAXY CLUSTERS (new - 6/2014) The referenced article records the detection of a weak unidentified emission line at E = 0:03 keV in a stacked XMM-Newton spectrum of 73 galaxy clusters spanning a redshift range 0:01 to 0:35. The origin of this emission is the intracluster/intergalactic medium (ICM). Galaxy clusters are the largest aggregations of hot intergalactic gas and dark matter.
