- FSC15307+3253
FSC15307+3253 [Cutri, R.M., et al. 1994, ApJ, 424, L65.] is an Ultra-Luminous InfraRed Galaxy (ULIRG), with a luminosity between 8 and 1000 µm of approximately 2e|13 solar luminosities, possibly the largest known at this time. The "FSC" refers to "Faint Source Catalog", one of the source catalogs produced by the
IRAS infrared survey mission. The emission is believed due to some combination of starburst activity and accretion onto a super-massiveblack hole , producing primary radiation at shorter wavelengths which is mostly blocked by obscuring dust, which is in turn heated and re-radiates in theinfrared . Theredshift of the source is , indicating a distance of the order of 7 billion light years.References
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