Robuta

https://www.aanda.org/articles/aa/abs/2005/46/aa2881-05/aa2881-05.html XMM-Newton observations of the Lockman Hole IV: spectra of the brightest AGN | Astronomy &... xmm newton of the lockman hole https://www.aanda.org/articles/aa/abs/2011/05/aa15763-10/aa15763-10.html Optical and infrared properties of active galactic nuclei in the Lockman Hole | Astronomy &... active galactic nuclei https://www.aanda.org/articles/aa/abs/2002/38/aah3688/aah3688.html XMM-Newton observation of the Lockman Hole - II. Spectral analysis | Astronomy & Astrophysics (A&A) https://www.aanda.org/articles/aa/abs/2008/32/aa09572-08/aa09572-08.html The long-term X-ray variability properties of AGNs in the Lockman Hole region | Astronomy &... https://www.aanda.org/articles/aa/abs/2013/10/aa22113-13/aa22113-13.html The Lockman Hole project: gas and galaxy properties from a stacking experiment | Astronomy &...