IRAS 18325-5926

A possible 16-hour period was detected by ASCA for the Seyfert I galaxy IRAS 18325-5926. A five-day ASCA observation revealed 9 cycles with a 14 percent amplitude. The orbital period at 5 Rs implies a 200 million Msub_sun black hole. This result requires confirmation.

Seyfert galaxy
(Credit: Figure and Text courtesy of Iwasawa)

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Last modified: Thursday, 26-Jun-2003 13:48:46 EDT