A basis for the organisation and classification of ragas depending on the notes used
Thaat:
Bhairav
Preferred time or season for playing
Time:
Early 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
Alternative names:
Hijaj Bhairav
Emotions evoked by the raga
Mood:
Bhakti (Devotion), Gambhir (Serious), Karun (Sad, Compassionate), Shant (Serene, Peaceful)
As the name suggests, Nat Bhairav is a variant of Bhairav. It has all seven notes, both in
Ascending movement of notes
aroh
 and
Descending movement of notes
avaroh
. All the notes are
A natural note (corresponds to notes in Western major scale)
shuddha
 except , which is
A flat note
komal
. It has raga Nat in the
Notes lower than M or P (depending on the point of view) of the middle octave
poorvang
 and raga Bhairav in the
Notes higher than M or P (depending on the point of view) of the middle octave
uttarang
. and represent Nat ang while represents the Bhairav ang. Some scholars say that its older name is Hijaj Bhairav.