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[vsnet-history 396] CCD observations (Kato)


(1993 Feb. 6)

subject: CCD observation of variables

IP Pegasi (V-band)
       UT         V-C
   Feb. 3.3863   +1.86 *1
        3.3871   +2.20 *1
   Feb. 5.3830   +3.20
        5.3837   +3.26
        5.3845   +3.20
        5.3852   +3.05
        5.3858   +3.01
  V = IP Peg
  C = 232311.01 +182513.7 (2000.0) 10.8
  (*1 scatter due to string twilight)

  The mean mangitudes of IP Peg were V=12.8 on Feb. 2 and V=13.9 on Feb. 5.

NGC4151 (V-band)
        UT         V-C1
   Feb. 2.814     +1.79 +/- 0.01 (3 frames)
   Feb. 5.650     +1.76
        5.651     +1.76
        5.652     +1.76
  C1: BD+40.2507  V=9.83 B-V=0.59 U-B=-0.01

  There remains ambiguity of background subtraction.  Therefore
variability can be checked only by differential maginitudes.

Regards,
Taichi Kato

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