The steep spectrum quasar PG1404+226 with ASCA, HST and ROSAT

We present and discuss our observations of the Narrow Line quasar PG1404+/- 226 (z(em) = 0.098) with ASCA and HST, and a re-analysis of our earlier obs ervations with ROSAT. The soft X-ray spectrum is very steep and displays an absorption feature ledge or line at similar to 1.1 keV). We have applied a variety of models to the ASCA and ROSAT spectra without finding a complete ly satisfactory fit, and the identification of the edge remains uncertain. A satisfactory fit of the ASCA spectrum assuming that the edge is produced by highly ionized iron (using the code absori in XSPEC) is obtained with an overabundance of iron by a factor greater than or equal to 25 compared to solar, a suggestion supported by the extremely high equivalent width of the Fe K alpha line at 6.4 keV. A warm absorber model (based on Cloudy) fittin g the absorption feature with NeVII-NeX edges and assuming a peculiar oxyge n/neon abundance ratio is consistent with the ROSAT data but not the ASCA d ata. Finally it is also possible that the observed edge is caused by a OVII I or OW edge or line, blueshifted by z(abs) = 0.2 to 0.5 depending on the s pecific identification, as has been suggested previously for 2 other Narrow Line quasars, but there are no other features in the UV and X-ray spectra in support of this suggestion. Two systems of UV absorption lines, one nearly at rest in the source frame, the other blueshifted by similar to 1900 km s(-1) are identified in the HS T/FOS spectra. Photoionization models indicate that the UV absorption and t he similar to 1 keV absorption are probably caused by absorbers with differ ent physical conditions. PG1404+/-226 is one more case of AGN where both UV and X-ray absorption features are detected, thereby increasing further the significance of the previously noted statistical association of the two ty pes of absorbers.