Hubble Space Telescope photometry from the ACS/WFC and WFPC2 cameras is used to detect and measure globular clusters ( GCs ) in the central region of the rich Perseus cluster of galaxies .
A detectable population of Intragalactic GCs is found extending out to at least 500 kpc from the cluster center .
These objects display luminosity and color ( metallicity ) distributions that are entirely normal for GC populations .
Extrapolating from the limited spatial coverage of the HST fields , we estimate very roughly that the entire Perseus cluster should contain \sim 50000 or more IGCs , but a targetted wide-field survey will be needed for a more definitive answer .
Separate brief results are presented for the rich GC systems in NGC 1272 and NGC 1275 , the two largest Perseus ellipticals .
For NGC 1272 we find a specific frequency S _ { N } \simeq 8 , while for the central giant NGC 1275 , S _ { N } \simeq 12 .
In both these giant galaxies , the GC colors are well matched by bimodal distributions , with the majority in the blue ( metal-poor ) component .
This preliminary study suggests that Perseus is a prime target for a more comprehensive deep imaging survey of Intragalactic GCs .