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[vsnet-newvar 1863] New variables in the fields of BF Cyg and V1016 Cyg



Dear colleagues,

I examined VRI photometry of the rest of the fields measured
during 2002 with 40cm telescope at Brno observatory in 2002
(some data were taken together with Petr Sobotka and Jan
Skalicky). The images were processed automatically. The
field photometry was searched for new variable stars using
algorithm described e.g. in Pojmanski, 2000
(astro-ph/0005236), and implemented in VARFIND by Lukas Kral
(http://kral.astronomy.cz/soft/varfind/).

Three new variables were detected.

Pej 018 = GSC 2137:222 in the field of BF Cyg
RA = 19:23:57.6, Dec = 29:37:13 (J2000)
The light curve suggests short period variable star. USNO
A2.0 gives b-r = 1.9 mag, but the star is of neutral colour
on my images (2 Cyg some 2 arcmin to the east might spoil
USNO A2.0 photometry). As it is probably short period star,
I give raw measurements (R and I band measurements are
differentials against GSC 2136:27, V band are absolute):
20020603.9461   1.43Ic
20020705.9650   1.73Ic
20020705.9652   1.84Ic
20020705.9655   1.68Ic
20020720.8858   1.42Ic
20020720.8860   1.42Ic
20020727.9579   1.56Ic
20020727.9588   1.54Ic
20020727.9597   1.62Ic
20020819.9546   1.58Ic
20020830.8771   1.53Ic
20020830.8780   1.57Ic
20020830.8789   1.50Ic
20021026.8507   1.78Ic
20021026.8517   1.74Ic
20021026.8526   1.83Ic
20030105.6895   1.49Ic
20030105.6913   1.57Ic
20020518.9204   1.17Rc
20020518.9214   1.14Rc
20020603.9472   1.33Rc
20020603.9474   1.29Rc
20020603.9477   1.34Rc
20020705.9662   1.55Rc
20020705.9664   1.64Rc
20020705.9668   1.59Rc
20020720.8868   1.34Rc
20020720.8871   1.35Rc
20020720.8873   1.33Rc
20020727.9577   1.48Rc
20020727.9586   1.47Rc
20020727.9595   1.43Rc
20020819.9525   1.45Rc
20020819.9535   1.41Rc
20020819.9544   1.41Rc
20020830.8769   1.68Rc
20020830.8778   1.51Rc
20020830.8788   1.48Rc
20021026.8506   1.65Rc
20021026.8515   1.62Rc
20021026.8524   1.72Rc
20021231.7514   1.27Rc
20021231.7523   1.03Rc
20030105.6893   1.43Rc
20030105.6902   1.40Rc
20030105.6911   1.49Rc
20020518.9226   13.32V
20020518.9231   13.29V
20020518.9236   13.28V
20020518.9242   13.29V
20020518.9247   13.30V
20020603.9489   13.43V
20020603.9494   13.38V
20020603.9500   13.38V
20020705.9678   13.92V
20020705.9682   13.82V
20020705.9687   13.84V
20020720.8887   13.46V
20020720.8892   13.55V
20020720.8896   13.50V
20020727.9575   13.52V
20020727.9584   13.55V
20020727.9593   13.57V
20020819.9523   13.78V
20020819.9533   13.66V
20020819.9542   13.59V
20020830.8767   13.67V
20020830.8777   13.61V
20020830.8786   13.65V
20021026.8504   13.77V
20021026.8513   13.79V
20021026.8522   13.84V
20021231.7521   13.44V
20030105.6892   13.40V
20030105.6901   13.41V
20030105.6910   13.47V

Pej 019 in the field of BF Cyg
RA = 19:24:10.5, Dec = +29:42:48 (J2000), USNO A2.0 gives
b-r = 2.2 mag
The star is red on my images and perhaps another low
amplitude SR. Nightly averages (concerning the comparison
stars see description of Pej 018, V filter isn't included
due to low S/N):
20020603.9461  0.78Ic
20020705.9652  0.75Ic
20020720.8860  0.66Ic
20020727.9588  0.70Ic
20020819.9546  0.79Ic
20020830.8780  0.79Ic
20021026.8517  0.64Ic
20021231.7510  0.81Ic
20030105.6905  0.82Ic
20020518.9204  2.04Rc
20020603.9474  2.13Rc
20020705.9665  2.15Rc
20020720.8871  1.89Rc
20020727.9586  1.85Rc
20020819.9535  2.04Rc
20020830.8778  2.15Rc
20021026.8515  1.87Rc
20030105.6902  2.11Rc

Pej 020 in the field of V1016 Cyg
RA = 19:57:14.9, Dec = +39:49:55 (J2000), USNO A2.0 gives
b-r = 1.8 mag, although the USNO A2.0 star is slightly
(several arcsec) off the position.
Perhaps another low amplitude SR. Nightly averages
(differentials against GSC 3141:577):
20020604.0601  1.59Ic
20020706.0585  1.54Ic
20020720.8751  1.67Ic
20020727.9762  1.69Ic
20020819.9714  1.77Ic
20020830.8958  1.79Ic
20021026.8694  1.51Ic
20021231.7693  1.60Ic
20030105.7072  1.60Ic
20020604.0609  3.05Rc
20020706.0596  3.12Rc
20020720.8762  3.14Rc
20020727.9760  3.18Rc
20020819.9708  3.33Rc
20021026.8692  3.03Rc
20030105.7071  3.14Rc

V1116 Cyg in the same field was also observed.

Best regards,

Ondrej Pejcha



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