X-ray bursts have recently been discovered in the Cepheids {delta}Cep and {beta}Dor modulated by the pulsation cycle. We have obtained an observation of the Cepheid {eta}Aql with the XMM-Newton satellite at the phase of maximum radius; the phase at which there is a burst of X-rays in {delta}Cep. No X-rays were seen from the Cepheid {eta}Aql at this phase, and the implications for Cepheid upper atmospheres are discussed. We have also used the combination of X-ray sources, as well as Gaia and 2MASS data, to search for a possible grouping around the young intermediate mass Cepheid. No indication of such a group was found.

Cone search capability for table J/AJ/162/92/table1 (XMM-Newton sources in the image around {eta}Aql)

Cone search capability for table J/AJ/162/92/table3 (2MASS counterparts to XMM-Newton sources)

Cone search capability for table J/AJ/162/92/table4 (Gaia counterparts to XMM-Newton sources)