Jp. Halpern et al., NO X-RAY-LUMINOUS STARBURSTS IN THE EINSTEIN MEDIUM SENSITIVITY SURVEY, EITHER, The Astrophysical journal, 453(2), 1995, pp. 611-615
We continue to investigate recurrent claims that a substantial number
of ''normal'' star-forming galaxies may have X-ray luminosities in the
range 10(42-44) ergs s(-1). In this installment, we present new spect
ra of four such emission-line galaxies that were ambiguously classifie
d in the Einstein Extended Medium Sensitivity Survey (EMSS), and find
that they all have intermediate-type Seyfert nuclei as evidenced by br
oad components of their Ha lines. We argue that any of the remaining e
mission-line galaxies in the EMSS with 10(42) < L(X) < 10(44) ergs s(-
1) that were flagged as needing further spectroscopic work are almost
certain to have active nuclei as well. We conclude that in these as we
ll as other samples of X-ray-selected emission-line galaxies, X-ray lu
minosities in excess of 10(42) ergs s(-1) can and should be attributed
to an active nucleus, even in the case that most of the infrared cont
inuum or optical emission-line luminosity is caused by star formation.
There is as yet no good evidence for X-ray-luminous starbursts.