|Title||Variable Compton-thin Absorption in the Seyfert 2 NGC 526a|
|Author||Dr Alex Markowitz|
|Description||We request two new XMM-Newton observations of the X-ray bright Compton-thin Sy 2 NGC 526a, each 40 ksec in duration, with one in each visibility window during AO12. We will compare the newly-obtained spectra with archival spectra for this object obtained with XMM-Newton and other missions; this will allow us to quantify the variability in the parameters of the partial- and full-covering neutral components over timescales of both years and months. The results will yield observational constraints for new, clumpy-absorber models.|
|Publication||The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
X-ray variability of Seyfert 1.8-1.9 galaxies . Hernandez-Garcia, L., Masegosa, J., et all. . A&A . 602-65 . 2017 . 2017A&A...602A..65H ,
AGN spectral states from simultaneous UV and X-ray observations by XMM-Newton . Svoboda, J., Guainazzi, M., . A&A . 603-127 . 2017 . 2017A&A...603A.127S ,
The Variable and Non-variable X-Ray Absorbers in Compton-thin Type II Active Galactic Nuclei . Laha, Sibasish, Markowitz, Alex G., et all. . ApJ . 897-66 . 2020 . 2020ApJ...897...66L ,
|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, 2015-01-20T23:00:00Z, 072173, 17.56_20190403_1200. https://doi.org/10.5270/esa-yn1hj6o|