Unusual Variables – X Ray and Visual GROs

  • Martin Griffiths
Part of the The Patrick Moore Practical Astronomy Series book series (PATRICKMOORE)


Observers who are looking for a particular challenge may be taken by the fact that extending into the short wavelengths of the electromagnetic spectrum, yet still visually observable in part, are a number of objects collectively known as X-ray variables and gamma ray objects. Naturally, these will be relatively rare, as they generally involve high mass stars or objects that are the subject of ongoing stellar research. Nevertheless, a light curve may be obtained photometrically from such objects if one has patience and determination.

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Martin Griffiths
    • 1
  1. 1.Dark Sky Wales, BlackmillBridgend, WalesUK

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