Search found 692 matches

by Joan Guarro Flo
Mon Jul 28, 2025 8:55 am
Forum: Symbiotic Stars
Topic: T CrB before its new nova event
Replies: 42
Views: 83106

Re: T CrB before its new nova event

Hello,

This is T CrB on yesterday night.

The intensity of some lines changed in the violet, from the preceddent graphic.

Cheers, Joan.
by Joan Guarro Flo
Sun Jul 27, 2025 6:10 pm
Forum: Novae
Topic: Nova Ser 2025
Replies: 6
Views: 415

Re: Nova Ser 2025

Hello,

After a lot of cloudy days I could observe Nova Ser 2025 yesterday night. It was on the boundary of SMM remote equipment,
but I have been able to reach this graphics by a NOU_T echelle.

Cheers, J. Guarro.
by Joan Guarro Flo
Tue Jul 22, 2025 5:11 pm
Forum: Spectroscopes and Softwares
Topic: POLARIMETER DEVICE PROJECT
Replies: 54
Views: 69099

Re: POLARIMETER DEVICE PROJECT

Hello,

New observations and new answers to learn.

Cheers, Joan.
by Joan Guarro Flo
Sun Jul 20, 2025 11:03 pm
Forum: Spectra, results, information on activity ...
Topic: First light
Replies: 3
Views: 224

Re: First light

Hi Tom,

Bold design!

Are you using a Barlow lens? It seems that Alpy can work to F/5.5 approximately.

So you if you are using your 50cm telescope at F/4, you are losing a lot of light.

It's the same as if your telescope has only 40 cm in diameter, am I wrong?

Cheers, Joan.
by Joan Guarro Flo
Fri Jul 18, 2025 4:14 pm
Forum: General Topics, Annoucements, Forum Life
Topic: MENDING AN OLD DOME
Replies: 0
Views: 176

MENDING AN OLD DOME

Hello to all,

As all of you can see in these pictures, today morning was a special moment at the Piera Observatory, we applied
a circular wall supplement in the dome number one that I made 45 years ago, this is another step in its improvement
before putting the old 406 mm diameter SC telescope ...
by Joan Guarro Flo
Tue Jul 01, 2025 12:02 pm
Forum: Spectroscopes and Softwares
Topic: POLARIMETER DEVICE PROJECT
Replies: 54
Views: 69099

Re: POLARIMETER DEVICE PROJECT

Hello,

These are Del Sco and P Cyg last night.

Regards, J. Guarro.
by Joan Guarro Flo
Mon Jun 30, 2025 4:55 pm
Forum: Spectroscopes and Softwares
Topic: POLARIMETER DEVICE PROJECT
Replies: 54
Views: 69099

Re: POLARIMETER DEVICE PROJECT

Hello,

You can notice these coherent results of V CVn on 2025 06 028.

Regards, J. Guarro.
by Joan Guarro Flo
Fri Jun 27, 2025 5:31 pm
Forum: Spectroscopes and Softwares
Topic: POLARIMETER DEVICE PROJECT
Replies: 54
Views: 69099

Re: POLARIMETER DEVICE PROJECT

Hello,

You can see a reference star HD103287 and the variable V CVn observations, and the interesting views of
comparing their spectrum and polarization.

Cheers, J. Guarro.
by Joan Guarro Flo
Sun Jun 22, 2025 5:10 pm
Forum: Spectroscopes and Softwares
Topic: POLARIMETER DEVICE PROJECT
Replies: 54
Views: 69099

Re: POLARIMETER DEVICE PROJECT

Hello,

From the village Horta de Sant Joan, a possible good place for observing the 2026 total solar eclipse,
I sent you these pictures from the last few days.

You can see the Mars Theta angle variations.​ And also, the Polarimetric software allows the
Instrumental Theta Error to be subtracted ...
by Joan Guarro Flo
Sun Jun 15, 2025 12:37 pm
Forum: Spectroscopes and Softwares
Topic: POLARIMETER DEVICE PROJECT
Replies: 54
Views: 69099

Re: POLARIMETER DEVICE PROJECT

Hello,

Planets and asteroids spectropolarimetry observations are very useful if one wants to tune the Theta Angle,
that is the reason that I observed Mars on this last 12th.

The provisional found values indicated that TheGiver gives -2.5º, ( 17º), off of the Mars theoretical Theta Angle, (19.5º ...