[vsnet-obs 35233] 2001 Aug 14-18 UT (GRL)

["Bjorn H. Granslo" <b.h.granslo@astro.uio.no>]

Norwegian Astronomical Society - Variable Star Section

Variable star observations for 2001 August 14-18 UT

Observer: Bjorn H. Granslo (GRL).
Location: Oslo & Fjellhamar, Norway.
Instruments: 203-mm SCT (C203), 15.2-cm f/8 and f/5 reflectors,
  (M152), 70-mm f/6.8 refractor (L70), 7x50 binoculars (B7x50)
Magnitude references: V-magnitudes from Hipparcos catalogue,
  Tycho-2 catalogues and Henden (H) CCD photometry; visual from
  BAA.VSS.
Observations: Visual, Pogson step estimates.
Conditions: Cloudy on Aug 14-15 (from Malm, Norway) and Aug 16-17;
  mostly clear on Aug 17-18.


Object      YYYYMMDD(UT)    Mag   Obs  Instrument Ref    Notes
TRIR        20010814.96     6.5   GRL  L70;15x    HIP
HERAC       20010814.96     7.7   GRL  L70;15x    HIP
SGER        20010814.96     9.6   GRL  M152;49x   TYC2
VULV        20010814.96     8.4   GRL  L70;15x    TYC2
PEGII       20010814.96     7.8   GRL  L70;15x    TYC2
CYGCH       20010814.99     8.1   GRL  L70;69x    TYC2

CYGSS       20010817.058   11.1   GRL  C203;100x  TYC2+H  Active
DRAAG       20010817.06     9.8   GRL  C203;100x  TYC2

SCOdelta    20010817.828    1.8   GRL  B7x50      HIP     (1)
OPHRS       20010817.87    11.7   GRL  M152;167x  BAA
CRBT        20010817.86    10.4   GRL  M152;83x   TYC2
CYGSS       20010817.866   11.3   GRL  M152;167x  TYC2+H  Active
SGEWZ       20010817.971   12.1   GRL  C203;287x  Henden  Fading
SGEWZ       20010818.090   12.3   GRL  C203;287x  Henden  Twilight
CETomicron  20010818.05     3.9   GRL  B7x50      HIP
HERAC       20010818.05     7.7   GRL  L70;24x    HIP
SGER        20010818.05     9.7   GRL  L70;24x    TYC2
VULV        20010818.06     8.4   GRL  L70;24x    TYC2
PEGII       20010818.06     8.0   GRL  L70;24x    TYC2
PERX        20010818.06     6.5   GRL  B7x50      HIP

Extra notes:
(1) Delta Scorpii was observed in bright twilight (Sun 6 deg.
under horizon) at an apparent altitude (corrected for refraction)
of only 2.6 deg. The sky was, however, very transparent. Mars was
seen at an apparent altitude of 2.1 deg. and was dimmed by only
1.9 mag. as compared to stars near zenith. This indicates an
extinction of 0.12 mag. per airmass. Observed from Blindern, Oslo.

                                 Yours sincerely,
                                 Bjorn H. Granslo

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