A University of Oklahoma doctoral student, graduate and undergraduate research assistants, and an associate professor in the Homer L. Dodge Department of Physics and Astronomy…
The supersharp radio “vision” of the National Science Foundation’s Very Long Baseline Array (VLBA) has revealed previously unseen details in a jet of material ejected…
An international team of astronomers has identified the farthest example of a rare class of gamma-ray emitting galaxies. The so-called BL Lacertae object was discovered…
The “ghostly particle” is confirmed to have originated from a blazar, nearly 4 billion light years from Earth. For the first time, scientists from around…
The VERITAS array has confirmed the detection of gamma rays from the vicinity of a supermassive black hole. While these detections are relatively common for…
Astronomers and physicists around the world, including in Hawaii, have begun to unravel a long-standing cosmic mystery. Using a vast array of telescopes in space…
NASA’s Fermi Gamma-ray Space Telescope has identified the farthest gamma-ray blazars to date, a type of galaxy whose intense emissions are powered by supersized black…
Using the Fermi catalog of very high energy sources and the WISE infrared sky catalog, astronomers have found two BL Lac blazars with no apparent…
Using data from from NASA’s Wide-field Infrared Survey Explorer (WISE) and Fermi Gamma-ray Space Telescope, astronomers studying distant galaxies powered by monster black holes have…
Nearly 10 billion years ago, the black hole at the center of a galaxy known as PKS B1424-418 produced a powerful outburst. Light from this…
Using the VERITAS array, astronomers have detected gamma rays from a blazar known as PKS 1441+25. The research shows that the source of the gamma…
Using NASA’s Fermi Gamma-ray Space Telescope, a team of astronomers has discovered hints of periodic changes in brightness in blazar PG 1553+113, whose emissions are…
NASA’s Fermi Gamma-ray Space Telescope and other satellites have recorded a record flare from a black hole at the center of the distant galaxy 3C…
Astronomers from the Harvard-Smithsonian Center for Astrophysics used Fermi to monitor the gamma-ray variability of thirteen blazars, finding evidence that the emission arises in several…
A team of astronomers has used Fermi data to reveal how blazars are distributed throughout the universe and to show the distinctive properties that define…
An international team of astronomers has for the first time confirmed a link between the gamma bursts and their counterparts in several radio frequencies, solving…
A new study details how researchers used data from blazars to measure the evolution of the EBL over the past five billion years for the…
Using data from the Hubble Space Telescope, researchers noticed that the emission spectrum from blazar PKS 1424+240 deviated from what was expected, possibly indicating something…