Social Security Death Benefit Claim?

My grandfather was a U.S. military pensioner. After his death my mother received a benefit for the services she has done for my grandfather. She received a monthly pension for being the annuitant of my grandfather. My mother had a Social Security number which her monthly pension had a deduction for Social Security payments. Now, my mother has passed away. We already reported her death and her pension already stopped. My question is, since my mother is a Social Security member is there any death benefit for an annuitant?

By Myrna Peña