2 Observations

The observations were carried out with the flat-field 70/100/210 cm Maksutov Astrograph (field: $5\hbox{$^\circ$}\times 5\hbox{$^\circ$}$, scale: $99.4\hbox{$^{\prime\prime}$}/{\rm mm})$ at the EACR.

All first epoch plates are 30 min exposure Kodak 103a0 plates. Although most of the second epoch plates are also 30 min exposure Kodak 103aO plates, definitive non-availability of this emulsion forced us to use hypersensitized Kodak IIIaJ plates to secure some of the second epoch fields. Extensive testing showed that with a 40 min exposure, the treated (forming gas baked) IIIaJ emulsions reached roughly the same magnitude limit as the 103aO's. All plates were taken near culmination and in good seeing conditions. Their limiting magnitude is approximately B=20.

Table 1 gives the 1950.0 coordinates of the 19 area centers, and the time base (T) in years between the first and second epoch observations. Two first epoch and two second epoch plates are available for each area; y₁ and y₂ are their corresponding time bases in Table 1. Figure 1 shows the distribution of the searched areas in the sky. It should be noted that a few of them have a fraction of their fields overlapped.

  

Table 1: The areas. See text for details

  

Figure 1: The searched areas