1E 0317+186, also known as RBS 413, is a BL Lacertae object or a blazar located in the constellation of Aries. The redshift of the object is (z) 0.190 and it was first discovered as an astronomical X-ray source during the Einstein survey in August 1983 by astronomers.
Description 1E 0317+186 is classified as an X-ray selected BL Lacertae object. The host galaxy has been categorized as an elliptical galaxy with a magnitude of -23.0 based on a study published in 1999 by Renato Falomo, dismissing the fact that this object is hosted by a spiral or a disk galaxy. A companion galaxy is located between 1 and 2 arcseconds away from the host. The supermassive black hole of 1E 0317+186 is estimated to be 7.57 M☉. Studies have indicated 1E 0317+186 is variable. It displays a decrease in brightness levels in the V-band, decreasing by 0.77 magnitude within 1.7 hours. It has also been noted to show one rapid outburst which was followed by a faded state from 17.57 to 18.20 in V-band frequencies. In the R-band, it has shown another outburst within the time range of 2.2 hours in December 1988. In February 1997, it showed an increase in brightness levels of 0.51 magnitude. Gamma-ray emission has also been detected in 2009, with the average flux levels of 2.4 ± 1.0 × 10−9 photons cm−2 s−1. Radio imaging made by the Very Long Baseline Array (VLBA) has shown the object has a jet component that is moving with proper motion speeds of 0.493 ± 0.100 milliarcseconds per year. The radio structure of the BL Lacertae object is mainly made up of a radio core and a few components.
References
External links 1E 0317+186 on SIMBAD