Ustad Salamat Ali Khan [Rare Pentatonic (i.e., Audav) Raga] 

राग विमल or राग विभावरी
Aaroh: SrGPnS'
Avaroh: S'nPGrS
This raga was created by Narayanrao Patwardhan. Even though I was able to find this raga in old books, Ustad Salamat Ali had created this raga independently and named it as कंवल भैरव. In fact, he had mentioned such a possibility of having his created ragas already existed in ancient times during his interview.
• A Discussion with Usta...
[Reference: 1) Bharatiya Sangeet: Raganidhi, encyclopedia of Indian ragas, a Comparative Study of Hindustani and Karnatak Ragas (Volume 4) authored by B. Subba Rao; Year 1966; 2) नव राग निर्मिती by Dr. शंकर अनंत टेंकशे ]