We present optical spectra with high signal-to-noise ratio of 10 BL Lac objects detected at GeV energies by the Fermi satellite (3FGL catalog), which previous...
-
PublicaciónSpectroscopy of 10 γ-Ray BL Lac Objects at High Redshift
-
PublicaciónStatistical redshift of the very-high-energy blazar S5 0716+714
Context. Blazars are the most numerous class of very-high-energy (VHE; E > 100 GeV) gamma-ray emitters. At present, measured redshifts are available only for...
-
PublicaciónStudy of the variable broadband emission of Markarian 501 during the most extreme Swift X-ray activity
Context. Markarian 501 (Mrk 501) is a very high-energy (VHE) gamma-ray blazar located at z = 0.034, which is regularly monitored by a wide range of multi...
-
PublicaciónSuzaku and Multi-Wavelength Observations of OJ 287 during the Periodic Optical Outburst in 2007
Suzaku observations of the blazar OJ 287 were performed in 2007 April 10-13 and November 7-9. They correspond to a quiescent and a flaring state, respectively...
-
PublicaciónSynchrotron emission from the blazar PG 1553+113. An analysis of its flux and polarization variability
In 2015 July 29-September 1, the satellite XMM-Newton pointed at the BL Lac object PG 1553+133 six times, collecting data for 218 h. During one of these epochs...
-
PublicaciónSystematic Search for VHE Gamma-Ray Emission from X-Ray-bright High-Frequency BL Lac Objects
All but three (M87, BL Lac, and 3C 279) extragalactic sources detected so far at very high energy γ-rays belong to the class of high-frequency-peaked BL Lac...
-
PublicaciónTesting emission models on the extreme blazar 2WHSP J073326.7+515354 detected at very high energies with the MAGIC telescopes
Extreme high-energy-peaked BL Lac objects (EHBLs) are an emerging class of blazars. Their typical two-hump-structured spectral energy distribution (SED) peaks...
-
PublicaciónTesting the Black Hole No-hair Theorem with OJ287
We examine the ability to test the black hole no-hair theorem at the 10% level in this decade using the binary black hole in OJ287. In the test we constrain the...
-
PublicaciónTesting two-component models on very high-energy gamma-ray-emitting BL Lac objects
Context. It has become evident that one-zone synchrotron self-Compton models are not always adequate for very high-energy (VHE) gamma-ray-emitting blazars...