|Title||Is Calvera riding against the Magnificent Seven|
|Author||Dr Silvia Zane|
|Description||Recent Chandra, Swift and Gemini observations of 1RXS J141256.0+792204 suggest that it is a new Isolated Neutron Star (INS). However, the INS nature of this source, dubbed Calvera, relies only on its large X-ray-to-optical flux ratio. An identification with an X-ray dim INS or a magnetar seems unlikely while that with a Compact Central Object or an old solitary ms-pulsar appears more plausible. Here we propose a 28 ks observation to obtain the first high-quality X-ray spectrum of Calvera and to perform an accurate timing analysis. The new X-ray data will clarify whether Calvera is an ordinary member of one of the already known INS classes or, more intriguing, if it is one of the long sought missing links required to unify the different INS classes in a common scenario.|
|Publication||Discovery of 59 ms pulsations from 1RXS J141256.0+792204 (Calvera) . Zane, S., Haberl, F., et all. . MNRAS . 410-2428 . 2011 . 2011MNRAS.410.2428Z ,
Is Calvera a Gamma-Ray Pulsar? . Halpern, J. P., . ApJ . 736-3 . 2011 . 2011ApJ...736L...3H ,
The peculiar isolated neutron star in the Carina Nebula. Deep XMM-Newton and ESO-VLT observations of 2XMM J104608.7-594306 . Pires, A. M., Motch, C., et all. . A&A . 544-17 . 2012 . 2012A&A...544A..17P ,
X-Ray Measurement of the Spin-down of Calvera: A Radio- and Gamma-Ray-Quiet Pulsar . Halpern, J. P., Bogdanov, S., . ApJ . 778-120 . 2013 . 2013ApJ...778..120H ,
Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift . Yershov, V. N., . Ap&SS . 354-97 . 2014 . 2014Ap&SS.354...97Y ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
Deep Optical Observations of Unusual Neutron Star Calvera with the GTC . Shibanov, Yury, Danilenko, Andrey, et all. . ApJ . 831-112 . 2016 . 2016ApJ...831..112S ,
Calvera: A Low-mass Strangeon Star Torqued by Debris Disk? . Li, Yunyang, Wang, Weiyang, et all. . ApJ . 854-165 . 2018 . 2018ApJ...854..165L ,
|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, 2010-10-28T00:00:00Z, 060118, 17.56_20190403_1200. https://doi.org/10.5270/esa-4qc7poh|