Selecting asteroids for a targeted spectroscopic survey

Asteroid spectroscopy reflects surface mineralogy. There are few thousand asteroids whose surfaces have been observed spectrally. Determining the surface properties of those objects is important for many practical and scientific applications, such as for example developing impact deflection strategies or studying history and evolution of the Solar System and planet formation. The aim of this study is to develop a pre-selection method that can be utilized in searching for asteroids of any taxonomic complex. The method could then be utilized im multiple applications such as searching for the missing V-types or looking for primitive asteroids. We used the Bayes Naive Classifier combined with observations obtained in the course of the Sloan Digital Sky Survey and the Wide-field Infrared Survey Explorer surveys as well as a database of asteroid phase curves for asteroids with known taxonomic type. Using the new classification method we have selected a number of possible V-type candidates. Some of the candidates were than spectrally observed at the Nordic Optical Telescope and South African Large Telescope. We have developed and tested the new pre-selection method. We found three asteroids in the mid/outer Main Belt that are likely of differentiated type. Near-Infrared are still required to confirm this discovery. Similarly to other studies we found that V-type candidates cluster around the Vesta family and are rare in the mid/oter Main Belt. The new method shows that even largely explored large databases combined together could still be further exploited in for example solving the missing dunite problem.Comment: accepted to A

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

CONSIDERATIONS ON THE INCIDENCE AND WIDESPREADING OF DISSEMINATED SCLEROSIS IN THE DISTRICT OF VARNA

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