Questions regarding the current flare and data availability should be directed to Dr. Observations on this X-ray source are highly encouraged, while the robotic and remotely controlled telescope at the University of Athens Observatory (UOAO) will continue toįollow the target in BVRI optical bands in the following days. The observations were obtained in a 3-min cadence and the brightness was increased by 1 mag within 9 minutes with a slope of ∼0.11 mag/minute.Īn exponential decline was observed until the end of the night, when the magnitude dropped from V=11.85(1) mag to V=12.72(1) mag in approximately 45 minutes. TYC was used as a comparison for the photometric reduction and it was found toīe a good standard with V=12.11(1) mag. Cosmic rays are also called galactic cosmic rays (GCR) because they are coming from space. While the source had a relatively stable luminosity of V=12.84(1) mag during the past days, there was a sudden increase of the observed flux, which started at HJD=2458144.43313Īnd reached the peak of V=11.85(1) mag at HJD= 2458144.43741 within a few minutes. Optical activity of the X-ray source 1RXS J051439.2-021615 The original publication paper can be found here:įor further information, you can visit Spitzer, JPL, NASA, BBC News: Without it, we cannot trust that black holes as envisaged by Hawking and others exist at all," said Mauri Valtonen, an astrophysicist at University of Turku in Finland and a coauthor on the paper. "It is important to black hole scientists that we prove or disprove the no-hair theorem. The University of Athens Observatory (UOAO) has a significant contribution on this study, as it observes OJ287 since 2006 in the frame of 'BOSS Project', which monitors photometrically the brightest blazars. Orbital and ground-based observations have been combined, in order to unveil the fast changing orbit. The light takes 3.5 billion years to reach Earth. Twice every 12 years, the smaller black hole crashes through the enormous disk of gas surrounding its larger companion, creating a flash of light brighter than a trillion stars - brighter, even, Orbiting this behemoth is another black hole with about 150 million times the Sun's mass. The OJ 287 galaxy hosts one of the largest black holes ever found, with over 18 billion times the mass of our Sun. Scientists have finally figured out the precise timing of a complicated dance between two enormous black holes, revealing hidden details about the physical characteristics of these mysterious cosmic objects. But because they are completely dark and can't be observed directly, they're not easy to study. The recently retired infrared observatory was the only telescope to spot a far-off flash of light that holds clues about the physical characteristics of these cosmic mysteries.īlack holes aren't stationary in space in fact, they can be quite active in their movements. On Sunday 21 June 2020 a partial solar eclipse was visible from Greece and it lasted 1 h and 22 min. The apparent distance between Venus and Sun was almost 4 degrees, making such a photo increadibly difficult! Almost 90 of all the incoming cosmic ray particles are protons, almost 10 are helium. The telescope at UOAO captured the thin crescent of Venus duringt the day, when the planet was at its closest apparent distance from the Sun. Cosmic rays are energetic particles originating from outer space that impinge on Earth's atmosphere. The celestial observers had the chance to watch a thin crescent of Venus even with a small telescope during the day! Planet Venus was at inferior conjunction with the Sun and Earth during the first days on 2022. Observation of planet Venus during inferior conjunction Oulu Neutron Counts Percentages of the Space Age average: today: -0.8 Below Average 48-hr change: +0.7 Max: +11.7 Very High. (binoculars, lenses, photographic cameras), should always be done with caution, using special filters.įor more information on the event and the observing methods, please follow the detailed observing information. Neutron counts from the University of Oulus Sodankyla Geophysical Observatory show that cosmic rays reaching Earth are slowly declining-a result of the yin-yang relationship between the solar cycle and cosmic rays. Observations of the Sun through a telescope, as well as with any other optical aid Photographs and animation from the eclipse are whon here:ĪTTENTION: One sould NEVER observe the Sun with naked eye. More than 600 visitors have witnessed the eclipse at the University of Athens Observatory, while at the same time all the eclipse phases were digitally recorded. The entire (partial phase of the) eclipse lasted for 2 hours and 15 minutes. Nasa has concluded its event in which it revealed more stunning images captured by the $10bn James Webb Space Telescope.On Tuesday 25 October 2022 a partial solar eclipse occured and it was visible from Greece. NASA, ESA, CSA, and STScI Copyright: NASA, ESA, CSA, and STScI
0 Comments
Leave a Reply. |