Transient in Lyra

[Paolo Berardi]

From CBAT:

TCP J18154219+3515598

http://www.cbat.eps.harvard.edu/unconf/ ... 15598.html

Possible dwarf nova mag 11.8 unfiltered

Paolo

[Paolo Berardi]

Dwarf nova!

Guiding camera view:





I updated the CBAT TOCP follow up with mine and Umberto's observation.

Paolo

[Francois Teyssier]

Excellent!
fits welcome for inclusion in the letter

François

[Paolo Berardi]

Sent you, François. Thanks.

A missing information, the spectrum is composed by 4 x 960s exposure frames.

Paolo

[umberto sollecchia]

Bonjour à tous, voici mon profil. Umberto

Profilo nova.png (5.52 KiB) Viewed 8977 times

[umberto sollecchia]

Bonjour à tous, placez un nouveau profil de la nova, observé hier soir.

Profilo nova.png (8.74 KiB) Viewed 8907 times

Umberto

[umberto sollecchia]

Salut, placé le profil d'observation du 06/12/2017.Umberto

Profilo nova.png (5.43 KiB) Viewed 8879 times

[umberto sollecchia]

Bonjour, placé le profil d'observation de cette nuit.

Profilo nova.png (5.3 KiB) Viewed 8846 times

Umberto

[Paolo Berardi]

Well done Umberto. I also observed the DN on June 12. An important rebrightening helped us to continue the observations. Rebrightenings are also indicators of the WZ Sge membership (but there was no doubt considering the high amplitude outburst).

I performed a relatively long session to try and follow with photometry the small flux oscillations (superhumps) typical of this class stars. I covered about two cycles.

The DN lightcurve (SXV-H9, Mak 90 scope, V band filter Baader, 88 x 120s frames):



The flux oscillates about 0.07 mag around mean value 12.49. I used the latter value to calibrate the spectrum in absolute flux. On the top of graph I reported the spectroscopic coverage (11 x 960s frames).



In addition to h-beta and h-gamma, the profile show the He I 4471 broad absorption line.

Paolo