[BAA Comets] Observers J-F Soulier and JJ Gonzalez capture Comet 29P/S-W1 undergoing a strong outburst

[Juan Jose Gonzalez]

Dear friends,


First of all, many thanks to Richard Miles for posting such interesting 
news and data on the recent 29P outbursts.

Second, congratulations to two good friends, J. F. Soulier and J. J. 
Gonzalez Diaz, for their detailed CCD images and photometry on this comet.

Third, thanks also to a much valued friend, Jonathan Shanklin, for his 
kind words on my visual estimates.

Fourth : yes, sometimes confusion arises about the two of us, Juan Jose 
Gonzalez Diaz and Juan Jose Gonzalez Suarez, living in the same city ( 
Oviedo, Spain ).

And fifth : yes, in a curious coincidence I was visually observing 29P 
at near the same time, July 2.06 UT.


Best regards,


Juan Jose Gonzalez Suarez


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Jonathan Shanklin wrote :

>
>
> I'll confess to some confusion between the two JJ's however:
>
>
> 29 2017 07 02.06  S 12.2 AQ 20.3T10 133 1.8 3/           ICQ XX GON05[ 
> In outburst. Starlike central condensation. The observed comais the 
> result of the recent previous minor outbursts. Comparison stars taken 
> from APASS photometry. Field stars checked in DSS.].
>
>
> Regards,
>
> Jonathan Shanklin



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Jakub Cerny wrote in Comets-ml :


> Hello Jonathan,
>
> I think this is little misunderstanding, there are two Spain 
> observers, Juan Jose Gonzalez (visual observer) and Juan Jose Gonzalez 
> Diaz (CCD observer), the similarity of names is confusing, however 
> from what I read in article about 29P, the observations used are CCD 
> observations from Juan Jose Gonzalez Diaz.
>
> Best regards,
> Jakub Cerny
>

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Jonathan Shanklin wrote :

>
>
> Juan Jose Gonzalez is a visual observer, and one of our major 
> contributors of such observations.  Congratulations to him on rivaling 
> the imagers, continuing in the tradition set by George Alcock.  I hope 
> this encourages other observers to take up systematic visual observing 
> and reporting of magnitudes.
>
>
> Regards,
>
> Jonathan Shanklin
>


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On 11/07/2017 Richard Miles wrote :

> For the very first time the onset and development of an outburst of
> enigmatic comet 29P/Schwassmann-Wachmann has been captured thanks to
> independent observations by Jean-François Soulier and Juan Jose Gonzalez
> Diaz on 2017 July 02. Details can be found on the BAA webpage:
>
> https://www.britastro.org/node/10684
>
> That BOTH observers were carrying out a time-series of CCD images at the
> SAME time is an amazing coincidence especially when it is realised that this
> is only the SECOND such strong outburst so far during 2017 and that such an
> event is more or less over and done within a time-window of about one hour!
>
> 29P was discovered 90 years ago and at last we have some hard data showing
> the onset of an outburst event. The beginning of the outburst is very sudden
> and, as such, it is clearly a singular event reminiscent of a cryovolcanic
> eruption at the nucleus. Analysis of the form of the rising lightcurve
> should provide some valuable insight into this possibility.
>
> The actual event was also the third very significant outburst within less
> than 10 days and it is likely that the all three are inter-related in some
> way, e.g. the first event triggered the second, which triggered the third.
> Since the July 2nd event, a fourth outburst has also taken place just 3.5
> days later! See Figure 3 at the above URL to see an example of the
> photometric lightcurve these past 45 days.
>
> Extremely well done Jean-François and Juanjo.
>
> Congratulations,
> Richard Miles
> BAA
>
>
>