There are very few popular Bollywood songs that have used Raag Ahir Bhairav as their basis. The equivalent scale in Western music is commonly known as the Mixolydian Flat 2 scale, though there are other names as well.

 

The intervals in this scale after the Tonic note are Minor 2nd, Major 3rd, Perfect 4th, Perfect 5th, Major 6th and Minor 7th.  The Swars are Sa, re, Ga, ma, Pa, Dha, ni – all Shuddh except re and ni.

 

As you can see, the intervals are the same as the Mixolydian scale, except for a flat 2nd note or komal re or minor 2nd interval.

 

Songs based on Raag Ahir Bhairav will use this scale. It is possible to have the home chord built on either Sa or ma. So, in a song based on this Raag using D as its Sa note, the base scale will have the notes D, Eb, F#, G, A, B, C, and you might find the home chord being set to D Major (D, F#, A) or G Major (G, B, D) by using the ma note as its Tonic.