"Bhairavi" is another name for the goddess Shakti and is one of the forms of Kali. In Sanskrit, Bhairavi means "fierce" and frankly I've been trying hard to find those elements in the Bhairavi raga :)
arohaṇa: S R2 G2 M1 P D2 N2 S
avarohaṇa: S N2 D1 P M1 G2 R2 S
The notes used are chathusruthi rishabham, sadharana gandharam, shuddha madhyamam, chathusruthi dhaivatham & shuddha dhaivatham and kakali nishadham. Notice that the two daivathams are used in the Arohana : chathusruthi (D2) and Avarohana uses the shuddha (D1) daivatham.
Considered to be an ancient raga its 15 centuries old and a hot favourite with all performers and teachers too. Heh, my teacher started out with this after my break and I desperately try to search for the fierce emotions whilst listening/performing this raga. Since summer has already started I do get hot under the collar but daresay that we cause more heat for others than anything else.
Older composers have numerous compositions in this raga which is a janya of the 20th Melakarta of Nataibhairavi. Surprisingly this fierce raga is well loved and widely used in both Hindustani and Karnatic padhattis and the Hindustani Bhairavi is, as usual, vastly different from the Karnatic Bhairavi, where the latter is a Sampoorna raga (scale of 7 notes) with two different dhaivatham's in its scale. That pushes it out of the Melakarta ragam classification, which is another blog entry sitting in the drafts folder ....sheesh !!