Hatena::Groupkanatatmp

KANATA ObsLog

2009-05-27

[] V1280 Sco : update

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The object keeps constant brightness in V and J. A similar behavior has ever been observed only in the eruption of GQ Mus(Nova Mus 1983).

But the duration of this phase of V1280 Sco is much longer than that of GQ Mus.

2009-05-24

[] PKS 1502+106 : Faded

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The object kept a bright state from JD 2454875 to 2454960. In JD 2454960, the object was the brightest state, and fell down to V~16.9.

2009-05-23

[] SN 2009dd : Update

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We update the light curve of SN 2009dd. The light curve continue to decrease the luminosity.

2009-05-21

[] SN 2009dc : Update

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We update the light curve of SN 2009dc. The I-band luminosity began to rise to secondary peak, which is expected to reach at later than normal SN Ia. The R-band light curve showed the shoulder-shape structure. Such a behavior is also commonly seen in both typical SNe Ia and peculiar bright SN 2006gz.

2009-05-16

[] V1280 Sco : update

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We update light curves of the dust-forming classical nova V1280 Sco. The decline trend continues in V-band.

[] PKS 1510-089 : faded

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The object had a historical optical flare during JD 2454960. After this flare, the object has been faded, and the V-J color become redder.

2009-05-15

[] SN 2009dc : Update

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We update the light curve of peculiar Type Ia SN 2009dc.

2009-05-14

[] SN 2009dc : Update

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We update the light curve of the peculiar Type Ia SN 2009dc. The photometric results indicated that I-band light curve may begin to rise to secondary maximum. In another peculiar Type Ia SN 2006gz, the secondary maximum is not seen. But, if the secondary maximum is confirmed, the maximum timing may be another luminosity indicator (Kasen 2006). We will continue to observe this peculiar object.

blazar OJ 287 : High polarization state

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The figure shows the light curve and the temporal variation of the polarization degree in V band. The brightness of the object has been risen since JD 2454950. The polarization degree has been high since JD 2454930, and reachs about 35 %.

2009-05-12

[] SN 2009dc : Update

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We update the light curve of Peculiar Type Ia SN 2009dc.

[] J1509-21: the outburst finished

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We confirmed that the fading from the outburst finished and the object has returned to the quiescent state.

blazar BL Lac : Update the data

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The figure shows the light curve in V band and the V-J color variation of the object. The object has recently been faded and the V-J color became redder.

blazar PKS 1510-089 : Optical flaring !

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The object has recently been bright since JD 2454900. In JD 2454960, the object has an exceptional flare with a rising of a polarization degree. This figure shows the light curve and temporal variation of the polarization degree of the object in V band. The brightness reached about V~13.3. The peak of the polarization degree anticipated that of the brightness. The polarization degree reached about 37%.

2009-05-11

[] SN 2009dc : Update

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We update the light curve of Type Ia SN 2009dc.

2009-05-10

[] SN 2009dd : Update

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We upload the light curve of Type II SN 2009dd.

[] SN 2009dc : update

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We update the light curve of Type Ia SN 2009dc.

2009-05-09

[] SN 2009dc : update

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We update the light curve of the Peculiar Type Ia SN 2009dc.

2009-05-07

[] SN 2009dd : Update

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We update the light curve of Type II SN 2009dd. The light curve shows an amplitude of 0.2~0.5mag, does not rapidly fading. Such a behavior for Type IIP supernova is typically seen early plateau phase.

[] SN 2009dc : Update

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We update the light curve of peculiar Type Ia SN 2009dc.

[] PKS 1510-089 : Rebrightening

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The figure shows the light curve and the temporal variation of the Polarization degree the object in V band. The object had a flare from JD 2454900 to 2454940. Recently, the object has a rebrightening, and at the same time, the polarization degree becomes high. This behavior is similar to the prior flare.

[] PKS 1502+106 : Bright

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The object was in the brightest state in our observing period. The object has been bright since JD 2454945. The polarization degree was also high compared with that in JD 2454940.

[] OJ 287 : fading

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The object has been faded since JD 2454940. The brightness reached V~15.6. The color variation has become bluer compared with the color around JD 2454900.

[] J1509-21: return to the quiescent state

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The object has returned to the quiescent state.

2009-05-04

[] 3C 273 ; Update the data

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3C 273 is one of the most famous blazar. The object has been observed since 11 Dec. 2008. The figure shows the light curve and the temporal variation of the polarization degree in V band of the object. The brightness was varied. The amplitude of the magnitude was about 0.2 in V band. The polarization degree was less than 1%.

[] PKS 1510-089 : update the data

f:id:kanataobslog:20090505005145p:image

The figure shows the light curve in V band and the V-J color variation of the object. Recently, the object has not varied. The brightness is about V~15.7. On the other hand, the V-J color has become bluer since JD~2454945.

2009-05-03

[] SN 2009dd : Rapidly fading

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We performed B,V,Rc,Ic-band photometric observations for Type II SN 2009dd. The light curve showed the rapidly fading, and a color became red. The shape of light curve may mean that the plateau phase had already finished, or this object was "Type II linear SN". We will perform a polarimetric observations for SN 2009dd.

[] SN 2009dc : Update

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The multicolor light curve of this object is updated.

2009-05-02

[] SN 2009dc : Update

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We update the light curve of peculiar Type Ia SN 2009dc.

[] J1509-21: fading rate decreasing

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The object still keeps fading, while the fading rate seems to be decreasing. It will return to the quiescent magnitude soon.

2009-05-01

[] SN 2009dc : Update

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We update the light curve of peculiar Type Ia SN 2009dc.