What's the salary for an astrophysist in the isro per month???
For any entry level scientist i.e., for the Scientist-C category the salary is the same for all the post i.e., its around Rs. 70,000 as a starting along with HRA, DA, TA etc.
For more details and information you must visit the career section of ICRB website.
I hope this answer helps. All the very best for your future endeavors!