A basis for the organisation and classification of ragas depending on the notes used
Thaat:
Bhairav
Preferred time or season for playing
Time:
Late morning
The most prominent note of a raga
Vadi
/
The second most prominent note of a raga
Samvadi:
, 
Categorization based on number of notes used in aroh and avaroh
Jati:
Containing 7 notes
Sampurna
-
Containing 7 notes
Sampurna
Emotions evoked by the raga
Mood:
Bhakti (Devotion), Gambhir (Serious), Shant (Serene, Peaceful)
As the name suggests, Ahir Bhairav is a variant of Bhairav. This raga was created by mixing Bhairav and Kafi. It has Bhairav in the
Notes lower than M or P (depending on the point of view) of the middle octave
poorvang
 and Kafi in the
Notes higher than M or P (depending on the point of view) of the middle octave
uttarang
. This raga has and as
A flat note
komal
 notes. The
A flat note
komal
 is not oscillated as much as in Bhairav. The phrase is called the Ahir
Style of presenting based on another raga
ang
/phrase, which is used quite often and is one of the key phrases of this raga. Though this raga can’t be grouped under any of the accepted 10 thaats, it is grouped under Bhairav due to its strong Bhairav
Style of presenting based on another raga
ang
.