|Title||A Search for X-ray Reverberation in the Ultraluminous X-ray Source NGC 5408 X-1|
|Author||Dr Tod Strohmayer|
|Description||We propose simultaneous optical (VLT-FORS2) and X-ray (XMM-Newton) observations of the ultraluminous X-ray source (ULX) NGC 5408 X-1 (hereafter X-1) in order to search for the signatures of X-ray reprocessing in its accretion disk. Our proposed observations will enable the first sensitive search for X-ray - optical correlations in a ULX and will address key questions regarding the nature of the accretor in X-1. For example, detection of an X-ray -- optical correlation, a signature of reprocessing, will establish that the optical flux is largely produced in the accretion disk and not the companion star. Measurement of X-ray optical time lags can lead to a mass estimate via the techniques of reverberation mapping.|
|Publication||X-ray time lags and non-linear variability in the ultraluminous X-ray sources NGC 5408 X-1 and NGC 6946 X-1 . Hernandez-Garcia, L., Vaughan, S., et all. . MNRAS . 453-2877 . 2015 . 2015MNRAS.453.2877H ,
First Search for an X-Ray--Optical Reverberation Signal in an Ultraluminous X-Ray Source . Pasham, Dheeraj R., Strohmayer, Tod E., et all. . ApJ . 818-85 . 2016 . 2016ApJ...818...85P ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
Ultraluminous X-ray sources with flat-topped noise and QPO . Atapin, Kirill, Fabrika, Sergei, . MNRAS . 486-2766 . 2019 . 2019MNRAS.486.2766A ,
|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, 2015-03-04T23:00:00Z, 072313, 17.56_20190403_1200. https://doi.org/10.5270/esa-ywf1sou|