|Title||Soft X-ray loud broad absorption-line quasars|
|Author||Dr Kajal Ghosh|
|Description||We have discovered three soft X-ray loud broad absorption-line quasars, based on the ROSAT data. The conundrum posed by this new class of AGN is how can a BAL region coexist with a powerful source of X-rays, since even a modest flux of X-rays will over-ionize the gas making it impossible to form Li-like atoms. We propose three short XMM-Newton observations of these three objects to determine their spectral nature (soft or hard) and to identify the possible origin of X-ray emissions.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2011-02-06T00:00:00Z, 060619, 17.56_20190403_1200. https://doi.org/10.5270/esa-kpp5x6e|