[vsnet-obs 59122] 2007 Aug 21-31 UT, visual [GRL, NAS.VSS].

[Bjorn H. Granslo]

Norwegian Astronomical Society - Variable Star Section.

Observations from 2007 August 21-31 UT [JD 2454334-2454344].

Observer: Bjorn H. Granslo [GRL].
Location: Fjellhamar, Norway.
Instruments: 203-mm SCT; 100-mm refractor; 7x50 binoculars.
Observations: Visual, Pogson step estimates and fractional estimates.
Report identification: grl_2007_08d.vis.

Variable    YYYYMMDD(UT)  Magn  Obs  Instrum.  Mag.ref  Estimates
CASrho      20070821.96    4.6  GRL  B7x50     NAS.VSS  B-4;D+1 [1]
CETomicron  20070823.09    8.9  GRL  C203;100x NAS.VSS  P-8;S=V;T+6 [2]
CRBR        20070825.943  12.7  GRL  C203;133x NAS.VSS  R-5;T+1 [2]
CRBR        20070827.926  12.8  GRL  C203;133x NAS.VSS  R-6;S-2;T=V [2]
CRBR        20070831.853  13.1  GRL  C203;133x NAS.VSS  S-5;T-2 [2]
CRBS        20070825.94    8.3  GRL  L100;25x  NAS.VSS  F-2;G+3 [1]
CRBT        20070825.94   10.4  GRL  C203;100x NAS.VSS  U-6;X+2 [1]
CRBT        20070827.92   10.4  GRL  C203;100x NAS.VSS  U-6;X+2 [1]
CRBT        20070831.85   10.4  GRL  C203;100x NAS.VSS  U-6;X+2 [1]
CYGAF       20070821.98    7.7  GRL  L100;25x  NAS.VSS  E-5;F-2;G+5 [1]
CYGSS       20070821.955   8.3  GRL  C203;100x NAS.VSS  B=V;C+4 [1]
CYGSS       20070823.078   8.3  GRL  C203;100x NAS.VSS  B=V;C+4 [2]
CYGSS       20070824.008   8.4  GRL  C203;100x NAS.VSS  B-1;C+3 [1]
CYGSS       20070825.958   8.4  GRL  C203;100x NAS.VSS  B-1;C+3 [1]
CYGSS       20070827.919   8.5  GRL  C203;100x NAS.VSS  B-2;C+3 [1]
CYGSS       20070831.855   9.8  GRL  C203;100x NAS.VSS  E-4;F=V [1]
CYGW        20070821.97    6.5  GRL  L100;25x  NAS.VSS  D-2;E+3 [1]
CYGchi      20070825.96    8.4  GRL  L100;25x  NAS.VSS  L-2;M+4 [1]
GEMU        20070828.096  10.6  GRL  C203;133x NAS.VSS  D(8)V(2)ZK [2]
LYNY        20070821.97    7.5  GRL  L100;25x  NAS.VSS  E-2;F+2 [1]
OPHRS       20070827.92   10.6  GRL  C203;100x NAS.VSS  P-1;R+3 [1]
OPHRS       20070831.85   11.0  GRL  C203;100x NAS.VSS  R-1;S+5 [1]
PEGAG       20070821.99    9.0  GRL  L100;25x  NAS.VSS  K-3;T+2 [1]
PERTX       20070824.02   10.9  GRL  C203;133x NAS.VSS  D-4;E-1;F+3 [1]
SCTR        20070821.96    5.3  GRL  B7x50     NAS.VSS  P-5;E+1 [1]
SGER        20070822.00    9.3  GRL  L100;40x  NAS.VSS  G-2;H+1 [1]
SGRV5558    20070827.907   8.6  GRL  L100;40x  NAS.VSS  F-3;H+6 [2]
SGRV5558    20070831.845   8.8  GRL  L100;40x  NAS.VSS  F-5;H+4 [1]
SN2007gr    20070824.017  12.7  GRL  C203;133x NAS.VSS  H-6;K-2;L+1 [2]
SN2007gr    20070828.072  12.7  GRL  C203;133x NAS.VSS  H-6;L+2;M+5 [2]
TRIR        20070828.07    9.0  GRL  C203;83x  NAS.VSS  H-6;L+4 [1]
UMAZ        20070821.98    7.7  GRL  L100;25x  NAS.VSS  C-4;D+2 [1]
VULV        20070821.99    9.1  GRL  L100;40x  NAS.VSS  K-5;L-1;M+4 [1]
VULV458     20070821.945  10.5  GRL  C203;100x NAS.VSS  G-4;H+1;K+6 [1]
VULV458     20070823.076  10.8  GRL  C203;100x NAS.VSS  G-6;K+3 [2]
VULV458     20070824.006  10.9  GRL  C203;100x NAS.VSS  G-7;K+1 [1]
VULV458     20070825.959  10.9  GRL  C203;100x NAS.VSS  H-3;K+1 [1]
VULV458     20070827.918  11.3  GRL  C203;100x NAS.VSS  K-2;L+2 [1]
VULV458     20070831.856  11.4  GRL  C203;100x NAS.VSS  K-3;L+1 [1]

Remarks:
(1) The prototype dwarf nova U Geminorum was detected in outburst in
morning twilight on Aug 28 UT.

(2) V458 Vul comparison stars (V-magnitudes from Miles and ASAS-3):
G = 10.15 [HDE 345266]; H = 10.51 [HDE 345374];
K = 11.14 [HDE 345264]; K = 11.47 [TYC 1628-1108].
V458 Vul = Nova Vul 2007: R.A. = 19h54m25s, Decl. = +20o52'.9 (2000.0).

(3) Supernova 2007gr comparison stars (provisional V-mags. by Henden):
H = 12.01 [TYC 2337-0542]; K = 12.41 [TYC 2337-0392];
L = 12.87 [GSC 2337-0180]; M = 13.25 [GSC 2337-0310].
SN 2007gr in NGC 1058: R.A. = 02h43m28s.0, Decl. = +37o50'45" (2000.0).

(4) R CrB comparison stars (V-magnitudes from NAS.VSS):
R = 12.24 [GSC 2039-1463]; S = 12.65 [TYC 2040-0765];
T = 12.85 [GSC 2040-0650]; U = 13.38 [GSC 2040-0101].