NASA NTRS · 19780036409
Discovery of an X-ray QSO
Abstract
The discovery of X-ray QSO MR2251-178 at a distance of 410 Mpc is reported. The observations are based on signals (2-11 keV) from NRAO's Very Large Array (VLA) radio telescope and from two independent rotating modulation collimators (RMC). Coordinates are given and positional identification with X-ray source 2A2251-179 is made. Examination of POSS plates and redshift has given rise to speculation that MR2251-178 could actually be a Seyfert galaxy; but its high luminosity would tend to support the contention that it is, indeed, a QSO.
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Ricker, G. R., Clarke, G. W., Doxsey, R. E., Dower, R. G., Jernigan, J. G., Delvaille, J. P., Macalpine, G. M., Hjellming, R. M.. 1978-01-05. Discovery of an X-ray QSO. https://ntrs.nasa.gov/citations/19780036409
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