FREQUENCY OF ISOLATION AND TYPE CHARACTERISTICS OF HERPES SIMPLEX VIRUS IN VARIOUS CLINICAL FORMS OF HERPES

The isolation rate of herpes simplex virus (HSV) was investigated in relation to the stage of herpetic disease in 186 patients from the Varna region. It was proved that HSV was isolated most success filly during the first 1-2 days after the appearance of herpetic vesicles. Isolation of HSV in the later stages of the illness was rather difficult. An analysis of the correlation between the type of the isolated HSV and the location of the disease was performed, too. It was established that HSV-1 was isolated from all patients with labial and facial herpes, HSV-2 was isolated from patients with genital and gluteal herpes while both types were isolated from cases with herpes of the extremities. The earlier established correlation between the HSV type and location of the herpetic disease remains unchanged in Bulgaria in contrast to many European countries and USA

H-alpha variability of the recurrent nova T Coronae Borealis

We analyze H-alpha observations of the recurrent nova T CrB obtained during the last decade. For the first time the H-alpha emission profile is analyzed after subtraction of the red giant contribution. Based on our new radial velocity measurements of the H-alpha emission line we estimate the component masses of T CrB. It is found that the hot component is most likely a massive white dwarf. We estimate the inclination and the component masses to be i~67 deg, Mwd = 1.37 +/-0.13 Msun and Msec=1.12 +/-0.23 Msun, respectively. The radial velocity of the central dip in the H-alpha profile changes nearly in phase with that of the red giant's absorption lines. This suggests that the dip is most likely produced by absorption in the giant's wind. Our observations cover an interval when the H-alpha and the U-band flux vary by a factor of ~6, while the variability in B and V is much smaller. Based on our observations, and archival ultraviolet and optical data we show that the optical, ultraviolet and H-alpha fluxes strongly correlate. We argue that the presence of an accretion disc can account for most of the observed properties of T CrB.Comment: 8 pages, 6 EPS figures, to appear in A&

Bipolar ejection by the symbiotic binary system Z And during its 2006 outburst

High resolution data in the region of the line Halpha have been obtained at the time of the light maximum and after it of the 2006 optical outburst of the symbiotic binary Z And. A blue-shifted absorption component indicating outflow velocity of about 1400 km/s as well as additional emission components with similar velocities, situated on the two sides of the main peak of the line were observed during that time. It is suggested that all of them are spectral signature of bipolar outflow, observed for the first time in the optical spectrum of this binary. The emission measure and the mass of the nebular part of the streams were estimated approximately.Comment: 5 pages, 2 figures; to be published in MNRAS Letter