Schwache blaue Objekte in der Nähe des galaktischen Nordpols (Umgebung von M 3)

The results of a complete UBV photometry in a field of 3.1 square degrees to the limiting magnitude B = 20.0 are given. The number of blue objects (with U — B ≤ — 0.4) per square degree brighter than magnitude B is given by the relation log N = (0.66 ± 0.08) (B — 18) — 0.04±0.07. The percentage of the blue objects is 2% of the total number of stars brighter than magnitude V = 19.5. It is not distinguished between WD and QSO.     

Automatisierung astronomischer Beobachtungs- und Auswertemeßtechnik mit Hilfe eines Kleinrechners im Dialogbetrieb (Mitteilung der Universitäts-Sternwarte zu Jena Nr. 142)

For the optional online control of three devices of measurement (photoncounting stellar photometer, microdensitometer, and iris diaphragm photometer) by a mini control computer an interpreting programming language was modified. It is possible now to control the devices by conversational processing as well as by programming, to sample and evaluate the measuring values, and to optimize the parameters of the process if it is wanted.