Namaskaram, it is mentioned that we are allowed to do Sandhyavandanam during 10 days asowcham (death of a relative theetu) with some restrictions like mantras chanted the mind, etc. Can we do brahma yagnam also after madhyanikam or it is not allowed during theetu? If chanting of veda mantras are not allowed during theetu, can the deva rishi tarpanams alone be done during this 10 day period or should the entire brahma yagnam be avoided during this period? Please clarify. Thanks.