Hatena::Groupkanatatmp

KANATA ObsLog

2010-09-26

[] Optical Transient in UGC 2773 : update

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We have performed the photometric observations of the optical transient in UGC 2773 since Sep. 1 in 2009. In first year, the light curve exhibits the slowly rising time. It takes 150 days of increase up to ~16 from ~17 mag in each band with a complex short time-scale fluctuation. The color exhibits a rough constant value of V-R ~ 0.6 -- 0.7. On the other hand, in the second year, the color exhibits the rapid changing into the blue color. The variability width in V-R is roughly estimated to be 0.5 mag. The temporal color variability indicates that this object might form a dust with a small opacity.

2010-09-25

[] Nova Aql 2010 : remain the CaII IR triplet

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We performed the photometric and spectroscopic observations of Nova Aql 2010. We newly obtained a spectrum using HOWPol installed to 1.5m-Kanata telescope on Sep. 25. The spectrum still exhibits strong CaII IR triplet, which indicate that this nova is still ongoing in its early stage. This spectroscopic property is corresponding to the slow evolution (t2 > 20) in photometry. We will continue the observations of this nova.

2010-09-24

[] Optical Transient in UGC 2773 : update

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We update the light curve of the optical transient in UGC 2773.

2010-09-20

[] Optical Transient in UGC 2773 : update

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We update the light curve of the optical transient in UGC 2773.

2010-09-18

[] Optical Transient in UGC 2773 : update

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We update the light curve of the optical transient in UGC 2773.

2010-09-17

[] Nova Aql 2010 : photometry

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We update the light curve of the nova Aql 2010.

2010-09-16

[] Optical Transient in UGC 2773 : update

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We update the light curve of the optical transient in UGC 2773.

[] Nova Aql 2010 : photometry

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We performed the photometric observations of nova Aql 2010 in VRcIc-bands. The reddened color indicates that this object would be heavily suffered the extinction from the dust.

2010-09-12

[] Optical Transient in UGC 2773 : update

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We update the light curve of the optical transient in UGC 2773.

[] Spectroscopy of Possible Nova Aql 2010

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We performed the spectroscopic observation of Possible Nova Aql 2010 at Sep. 11.60 UT. This possible nova was discovered by amatuer astronomers Nishiyama and Kabashima (reported in IAUC 9167). The spectrum shows a highly reddened continuum and no strong features below 6000A. The H-beta emission line is not seen. These characteristics indicate that this nova is suffered from the dust extinction on the Galactic plane. H-alpha exhibits the P-Cyg profile and an absorption minimum reached 1500 km/s. OI7774, OI8446 and CaII 8662 also show P-Cyg profile. These velocities of absorption features reached 1500 km/s, corresponding to that of H-alpha. We confirmed strong emission lines of CaII NIR triplet. These features indicate that this nova have evolved just after the maximum light. The slow velocity predict that the luminosity will slowly evolved. These observational characteristics support that this nova is classified into a "FeII" nova, suggested in Williams et al.(1994). We will continue the observations of Nova Aql 2010.

2010-09-04

[] M33 2010-07a : update

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We update the light curve of M33 2010-07a.

[] Optical Transient in UGC 2773 : update

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We update the light curve of the optical transient in UGC 2773.

2010-09-03

[] Optical Transient in UGC 2773 : update

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We update the light curve of the optical transient in UGC 2773.

2010-09-02

[] Optical Transient in UGC 2773 : update

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We update the light curve of the optical transient in UGC 2773.

2010-09-01

[] Optical Transient in UGC 2773 : update

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We update the light curve of the luminous blue variable OT in UGC 2773.