J/other/PZ/31.3 Two new cataclysmic variables in Lyra (Denisenko+, 2011) ================================================================================ Two new cataclysmic variables in Lyra. Denisenko D.V. =2011PZ.....31....3D ================================================================================ ADC_Keywords: Stars, variable ; Binaries, cataclysmic ; Photometry Abstract: I report on the discovery of two cataclysmic variables in the same field in Lyra, originally identified on the base of their magnitudes in the USNO-B1.0 catalog and on Palomar images. The historical light curves were analyzed from 300+ photographic plates of the Moscow collection, covering 35 years of observations. One of the two stars, USNO-B1.0 1320-0390658, is showing rather frequent outbursts from B~20 to B=15.2 and is likely a dwarf nova of the UGSS subtype. The other variable, USNO-B1.0 1321-0397655, with only one observed outburst in 1993, from B~19 to I=11.8, is either an UGWZ dwarf nova or a recurrent nova. In both cases, its next outburst can occur in the nearest future. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 19 21 44.23 +42 04 41.8 DDE 20 = USNO-B1.0 1320-00390658 19 21 48.93 +42 09 46.6 DDE 21 = USNO-B1.0 1321-00397655 ---------------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 31 14 Magnitudes of new variables on Sky Survey plates table2.dat 34 28 Outbursts of USNO-B1.0 1320-0390658 = DDE 20 dde.dat 184 28 *Catalogue of variable stars discovered by Denis Denisenko (DDE) (26/08/2011 version) -------------------------------------------------------------------------------- Note on dde.dat: the catalog is available at http://hea.iki.rssi.ru/~denis/VarDDE.html -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 "YYYY/MM/DD" Date Observation date 12- 15 A4 --- Band Observed band 18 A1 --- l_mag20 Limit flag on mag20 19- 23 F5.2 mag mag20 Magnitude of DDE 20 27- 31 F5.2 mag mag21 Magnitude of DDE 21 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 A6 --- Plate Plate number 8- 17 A10 "YYYY.MM.DD" Obs.date Observation date 19- 25 A7 "h:m" Obs.time Observation time (hh:mm.m) 27- 28 I2 min TExp Exposure time 30- 33 F4.1 mag mag Observed magnitude 34 A1 --- u_mag large certainty on mag -------------------------------------------------------------------------------- Byte-by-byte Description of file: dde.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 A3 --- --- [DDE] 5- 6 I2 --- DDE [1/28] DDE sequential number 9- 10 I2 h RAh Right ascension (J2000.0) 12- 13 I2 min RAm Right ascension (J2000.0) 15- 19 F5.2 s RAs Right ascension (J2000.0) 21 A1 --- DE- Declination sign (J2000.0) 22- 23 I2 deg DEd Declination (J2000.0) 25- 26 I2 arcmin DEm Declination (J2000.0) 28- 31 F4.1 arcsec DEs Declination (J2000.0) 34- 37 F4.1 mag magM Maximum magnitude 38 A1 --- u_magM Uncertainty flag on magM 40 A1 --- l_magm Limit flag on magm 41- 44 F4.1 mag magm Minimum magnitude 45 A1 --- u_magm Uncertainty flag on magm 46 A1 --- --- [R] 47- 51 F5.3 d Per ? Period 55- 57 A3 --- Type Variability type 61- 63 A3 --- Cons Constellation 66- 78 A13 ---- USNO-A2.0 USNO-A2.0 designation 81- 84 F4.1 mag Rmag ? R magnitude 87- 90 F4.1 mag Bmag ? B magnitude 92-184 A93 --- Note Note -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 11-May-2012