[vsnet-outburst 7704] GW Lib: superhumps in the V, J, and Ks-bands

[uemuram at hiroshima-u.ac.jp]

GW Lib: superhumps in the V, J, and Ks-bands

The following page now includes our observations last night:

http://kanatatmp.blogspot.com/search/label/GW%20Lib

The fading speed became smaller. The colors V-J and J-Ks are now about -0.2 and -0.0, respectively. The current emission between the V- and Ks-bands can be described with a simple blackbody emission with a temperature about 12000K.

Superhumps on 25 Apr. have similar amplitudes in the V-, J-, and Ks-bands. Superhump maxima delayed in the infrared bands (J & Ks) compared with the V-band. Interestingly, the secondary maximum is more clearly detected in the Ks-band, indicating the second peak has a lower temperature than the main one.

We have started tonight observations, detecting superhumps 
having similar amplitudes to those observed last night.
The growing phase of superhumps is apparently terminated, 
and superhumps have fully evolved.

Regards,
Makoto Uemura and Akira Arai
on behalf of the KANATA team