NICER study of pulsed thermal X-rays from Calvera: a neutron star born in the Galactic halo?

S. Mereghetti, M. Rigoselli, R. Taverna +4

Calvera (1RXS J141256.0+792204) is an isolated neutron star detected only through its thermal X-ray emission. Its location at high Galactic latitude ($b=+37^{\circ }$) is unusual if C…