J/other/PZ/31.3 Two new cataclysmic variables in Lyra (Denisenko+, 2011)
Two new cataclysmic variables in Lyra.
Denisenko D.V.
<Perem. Zvezdy, 31, 3 (2011)>
=2011PZ.....31....3D 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:
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RA (2000) DE Designation(s)
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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
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File Summary:
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FileName Lrecl Records Explanations
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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)
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Note on dde.dat: the catalog is available at
http://hea.iki.rssi.ru/~denis/VarDDE.html
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: dde.dat
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Bytes Format Units Label Explanations
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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
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 11-May-2012