Search results for "PKS 2155-304"

showing 2 items of 2 documents

REM near-IR and optical multiband observations of PKS 2155-304 in 2005

2007

Spectral variability is the main tool for constraining emission models of BL Lac objects. By means of systematic observations of the BL Lac prototype PKS 2155-304 in the infrared-optical band, we explore variability on the scales of months, days and hours. We made our observations with the robotic 60 cm telescope REM located at La Silla, Chile. VRIJHK filters were used. PKS 2155-304 was observed from May to December 2005. The wavelength interval explored, the total number of photometric points and the short integration time render our photometry substantially superior to previous ones for this source. On the basis of the intensity and colour we distinguish three different states of the sour…

Time delay and integrationActivegalaxies: activeGalaxies ; Active ; BL Lacertae objects ; Individual ; PKS 2155-304FOS: Physical sciencesIndividualAstrophysicsPKS 2155-304UNESCO::ASTRONOMÍA Y ASTROFÍSICAAstrophysicslaw.inventionPhotometry (optics)TelescopelawGeneral patterngalaxies: active; BL Lacertae objects: individual: PKS 2155-30; errata; addendaPhysicsAstrophysics (astro-ph)Astronomy and Astrophysicsgalaxies: active; galaxies: BL Lacertae objects: individual: PKS 2155-304H bandBL Lacertae objects: individual: PKS 2155-30Galaxies:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]WavelengthSpace and Planetary ScienceBL Lacertae objectsUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogoniaaddenda:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]galaxies: BL Lacertae objects: individual: PKS 2155-304errataV bandFlare
researchProduct

REM near-IR and optical multiband observations of PKS 2155-304 in 2005

2007

PhysicsPKS 2155-304Space and Planetary ScienceAstronomyAstronomy and AstrophysicsAstrophysicsAstronomy & Astrophysics
researchProduct