Revista Mexicana de Astronomía y Astrofísica ISSN: 0185-1101 [email protected] Instituto de Astronomía México

Ishioka, R. Dwarf nova-like outburst of short-period intermediate Polar HT camelopardalis Revista Mexicana de Astronomía y Astrofísica, vol. 20, julio, 2004, p. 259 Instituto de Astronomía Distrito Federal, México

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How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative IAU Colloquium 194 - Compact Binaries in the Galaxy and Beyond (© Copyright 2004: IA, UNAM) Editors: G. Tovmassian & E. Sion last p the ligh outburst succeeded w a as Decem 8.6 observ time-scale the of dw no rather seeming field the data serv suggest the Our is R a Sky J0757.0+6306, outbursts during et this ternativ est 8.52min. t kusastro.ky Ky yp erformed evMexAA e p ab short v oto 1 D al. the arf the erio e confirmed ae. In The Figure HT After Departmen t orbital optical min. ations rising spin Surv quiescen outburst. out ob W of dw on curv Univ time-series 1998). spin ation the b short short orbital d ject 4 HT ARF Cam e er arf 6th 150 regularit Decem of ey outburst pulse that , y in oto- ersit e. Strong its Ho and rate ligh ears. 2001, pulses in . and 2 w mo within p coun 86min terpretation no Cam (Serie is outburst 0.5 d. T e erio spin w outburst. t t sho u.ac.jp). The y is disco observing o v the dulations. , p t ev the detected of disk observ an is vmassian w a Saky NO This b the erio disco terpart a curv d ws d er, as and er Considering Astronom or y is faster and 8.6 p IP , and rising 1.5 short cataclysmic in v of after erio de photometric o-ku, d. not the of ∼ ery 30, shortness instabilities WZ the the V termediate is e v ation classification 80.92min w min w w ered Confer A-LIKE d 0 By quite of strong HT d , e as e Figure . reccurence than v of after long-term 2 orbital existence Ky a b that the Sge-t during indicates 6 ery phase started et iden v y the efore A detected mag detecting coheren the , erage oto outbursts rep during al. Cam Graduate t t outburst strong. encias) 3 ypical tified it subtracting pulses yp declining first the 606-8502, hard of orted (1998) 1 mag v (a), the and p w ma POLAR ariable p e the the R. spin erio sho the as olar in t o densit OUTBURST stars of that mo y observ the of the time the ccurred detection. b X-ra among pulses but Ishiok d , a ws missed, the with b declining d y to Sc 2001 first dw − outbursts, 20 HT dulations suggested e w profiles spin detection with Japan allo 86 ho H. 1 amplitude the R ere the phase an (T VSNET . arf iden y y , of it spin ol OSA 259–259 min a time-series Cam. a Itoh source the o ations w of decreased are outbursts SU the strongly 1 vmassian p of magnetic p no ed outburst rep HT tified a (ishiok erio but erio during and the p Science, T v p longer of of short- UMa- Th erio an phase dw on white a-lik orted erio with that d The d All- and and w RX the ob- the the VSNET CAMELOP us, arf al- a@ 29 of as as (2004) d, of of of d e OF Collab SHOR crosses Fig. bins or cles visual that the Additionally that T The Ishiok instabilities during to Fig. o -0.1 diff.-0.1 mag mag 0.0 0.1 0.0 0.1

vmassian, Rc, V, or m_vis 12 14 16 18 snapshot ∼ 2273.6 son, Morik The 11 12 13 14 15 16 17 18 and 2. total declining of 1. 270 disk the 0 a, -1 oration observ ARD . Av the with 1 the P a c The T-PERIOD small R., discrepancy a . mag 271 outbursts eraged w instabilities flux a A., time-series a, rapidly CCD ations error G. starting , Kato, ligh 0 2273.8 ALIS rate K., 272 the crosses et T (b). H., and eam t spin al. et bars regularit observ curv c 273 Greiner, rep REFERENCES hanged It T., 1998, declining 1 al. the on b profiles sho at CCD orted b then e sho 274 o 2002, et HJD -2452000 Uem HT ations HJD-2450000 ccurred of w 2274 the pulse w INTERMEDIA A&A, w p phase y een at 2 J., the 275 observ gradually to ositiv ura, a Cam during outer of P v 2002 -1 HJD phase Kroll, ASJ, VSNET. erage and | flux the outburst c the b d 276 335, during e M., ations. 2274.2 are 2452274.0. disk detections outbursts the the HT Camoutburst 54, declining strongly P 277 magnitude (c,d). 227 0 ., Billings, increased caused declining 581 Szk upp edge. the in 278 The d o er-limits 2001. 1 dy outburst. 2274.4 279 b filled suggests suggests , rates b y TE G. P in y phase. visual ., again 280 disk 1-hr The Ma- 2 259 W., cir- of of