2002A&A...381..894M

Query : 2002A&A...381..894M

2002A&A...381..894M - Astronomy and Astrophysics, volume 381894-904 (2002/1-3)

RX J1643.7+3402: A new bright cataclysmic variable.

MICKAELIAN A.M., BALAYAN S.K., ILOVAISKY S.A., CHEVALIER C., VERON-CETTY M.-P. and VERON P.

Abstract (from CDS):

We report the discovery of a new bright (V∼12.6) cataclysmic variable star identified with the ROSAT X-ray source RX J1643.7+3402. Spectroscopic and photometric observations show it to be a novalike variable sharing some of the characteristics of the SW Sex sub-class of novalike CVs. The spectroscopic period may be either 2.575h or 2.885h within the period ``gap''. A photometric modulation with a probable period of 2.595h and an amplitude of ∼0.1mag in V is present on most nights and could be either a ``positive" or a ``negative" superhump modulation (depending on the exact spectroscopic period), indicating the presence of a precessing accretion disk in this system. Rapid variations of 0.1 to 0.2mag amplitude in V repeat with a time scale of ∼15min.

Abstract Copyright: ∼

Journal keyword(s): accretion, accretion disks - stars: novae, cataclysmic variables - stars: binaries: close

Nomenclature: Table 2: [MBI2002] Star N (Nos 1-8).

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 BD+12 237 * 01 49 09.4876255128 +13 33 11.799646344   10.38 10.19     sdA0IVHe1 94 0
2 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
3 V* DW UMa CV* 10 33 52.8751411128 +58 46 54.717259044   14.33   14.33 14.35 ~ 254 0
4 V* LX Ser CV* 15 38 00.0938074584 +18 52 03.244681812     15.06     G8Ve 162 0
5 V* V818 Sco LXB 16 19 55.0692669024 -15 38 25.017666540 11.60 12.40 11.1     Oev 1730 0
6 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
7 V* V1084 Her CV* 16 43 45.6974063496 +34 02 39.549009444     12.48     ~ 44 0
8 HD 151087 PM* 16 43 51.6875811288 +34 02 19.689178848   6.326 6.010     F2.5III-IV 48 0
9 V* V795 Her CV* 17 12 56.1689188488 +33 31 19.240640724   12.53 12.64 12.69   ~ 191 0
10 V* V442 Oph CV* 17 32 15.1362474864 -16 15 22.068343152       14.120   ~ 93 0
11 V* V533 Her No* 18 14 20.4844831200 +41 51 22.069747872   15.000 15.032 15.274   ~ 265 0
12 BD+28 4211 HS* 21 51 11.0221915656 +28 51 50.367627468 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 837 0

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