Chromospheric active stars: a key program for amateurs

Show your spectra, your results ...

Re: Chromospheric active stars: a key program for amateurs

Postby Alexandre Santerne » Sun May 19, 2019 11:50 am

Thanks Olivier for the image.

In order to evaluate how to develop the Sindex pipeline and building a kind of DB, Christian, Olivier, others, could you please send me an example of your 1D extracted and wavelength-calibrated H&K spectrum ?

I will see how I can proceed these spectra coherently to measure the Sindex.

Thanks.
My email: Alexandre.santerne@lam.fr

Cheers,
Alex
Alexandre Santerne
 
Posts: 12
Joined: Wed Sep 03, 2014 4:00 pm
Location: Marseille

Re: Chromospheric active stars: a key program for amateurs

Postby Peter Somogyi » Sun May 19, 2019 8:03 pm

Hello Alexandre,

I've sent you 2 nights (2019.05.10, 05.17 + RS CVn: also on 2019.04.19) of 4 program stars (RS CVn = HD 114519, HD115404, Ksi Boo = HD 131156, Sig CrB = HD 146361).
Out of these 4 targets, RS CVn is showing an always different profile - like shooting different stars:
pso_RSCVn_3compare.gif

For the other stars, I cannot see much change (continuum slope varies somewhat - should be the choice and manual handling of reference star).
I am suprised to see the S-index being used for RS CVn - browsing through the articles for RS CVn referred to by Simbad (at least 3 I could find), the CaII + Heps emissions are measured in either EWs or fluxes (with different continuum subtraction techniques - either approximated or using a real or reconstruced templace star).
Hope we can continue the exploration and learn further!

Cheers,
Peter
Peter Somogyi
 
Posts: 404
Joined: Sun Jul 13, 2014 8:56 am

Re: Chromospheric active stars: a key program for amateurs

Postby Dubreuil Pierre » Sun May 26, 2019 12:54 am

Bonsoir

Actuellement en mission NP sur le C2PU Calern, nous profitons aussi du T400 amateur pour utiliser UVEX(3) .
actuellement avec reseau 1200 et fente 25microns.

Ci-dessous comparaison d'un spectre T400 et une précédente acquisition avec C8.
compare T400-C8_hd131156.png


a suivre

Pierre et Bertrand
Dubreuil Pierre
 
Posts: 137
Joined: Sat Oct 01, 2011 12:34 pm

Re: Chromospheric active stars: a key program for amateurs

Postby David Antao » Sun Jun 02, 2019 3:14 pm

Bonjour à tous,

Quelques infos utiles sur la liste de cibles à observer :

Image


constellation AD DEC Mag en B type spectral Vr Info
HD 166 Pegase 00 06 36.78 + 29 01 17.41 6.88 G8 D -6.59 Variable of BY Dra type
HD 20630 Baleine-Taureau 03 19 21.70 + 03 22 12.72 5.52 G5V B 18.8 Variable of BY Dra type
HD 22468 Taureau-Baleine 03 36 47.29 + 00 35 15.94 6.63 K2:Vnk C -15.3 Variable of RS CVn type
HD 37394 Cocher 05 41 20.34 + 53 28 51.81 7.07 K1 D 1,32 Variable of BY Dra type
HD 41593 Orion 06 06 40.48 + 15 32 31.57 7.57 K0V E -9,89 Variable of BY Dra type
HD 114519 Chien de chasse 13 10 36.91 + 35 56 05.59 8.51 F6IV + G8IV C  -13.62 Binaire à éclipses de type Algol
HD 115404 Chevelure de berenices 13 16 51.05 + 17 01 01.84 7.69  K2V C 7.67 Étoile à mouvement propre élevé
HD 131156 Bouvier 14 51 23.38 + 19 06 01.70 5.37 G7Ve+K5Ve C 1.59 Variable of BY Dra type
HD 146361 Couronne Boréale 16 14 40.86 + 33 51 30.95 5.64 F6V+G0V C -14.69 Variable of RS CVn type
HD 200391 Renard 21 02 25.91 + 27 48 26.44 7.93 G0V+G5V C -24.6 Herbig Ae/Be star
HD 210334 Lezard 22 08 40.82 + 45 44 32.11 6.83 K0IVe+G5IV C -33.84 Variable of RS CVn type
HD 220140 Cephée 23 19 26.64 +79 00 12.67 8.43 G9V E -16.8 Variable of RS CVn type
HD 224085 Pegase 23 55 04.05 + 28 38 01.25 8.20 K2+IVeFe-1 C -20.5 Variable of RS CVn type

A bientôt
David
David Antao
 
Posts: 20
Joined: Thu Nov 03, 2011 4:21 pm
Location: Midi-Pyrénées FRANCE

Re: Chromospheric active stars: a key program for amateurs

Postby Dubreuil Pierre » Tue Sep 10, 2019 9:24 am

Bonjour à tous

Samedi soir, avant de lancer une série Rr_Lyr j'ai pointé le C8 sur HD 146361.

La prochaine fois je poserai plus longtemps.

_hd146361_20190907_829_Pierre Dubreuil.png
region UV H & K
_hd146361_20190907_829_Pierre Dubreuil.png (7.45 KiB) Viewed 3942 times


HD146361  zoom  H & K.png
ZOOM sur la région H & K
HD146361 zoom H & K.png (7.04 KiB) Viewed 3944 times


A suivre

Pierre
Dubreuil Pierre
 
Posts: 137
Joined: Sat Oct 01, 2011 12:34 pm

Re: Chromospheric active stars: a key program for amateurs

Postby Christian Buil » Wed Sep 11, 2019 12:16 am

Pas mal du tout pour une étoile de magnitude V=5,5 avec un C8 ! Belle mise en évidence de l'émission.

Christian
Christian Buil
 
Posts: 1377
Joined: Mon Sep 26, 2011 6:59 pm

Re: Chromospheric active stars: a key program for amateurs

Postby Benjamin Mauclaire » Wed Sep 11, 2019 2:56 pm

Salut,

A combien estimes-tu l'amplitude de l'emission ?
A combien estimes-tu l'amplitude du bruit du continuum proche ?

Benji
Spcaudace spectroscopy software: saving you hundred hours of frustration.
Benjamin Mauclaire
 
Posts: 239
Joined: Thu Sep 29, 2011 10:14 am

Re: Chromospheric active stars: a key program for amateurs

Postby Dubreuil Pierre » Fri Sep 13, 2019 9:30 am

Bonjour à tous

Quelques détails dans H et K pour HD 210334 avec UVEX G1200 slit 25µ

HD 210334 chromospherique UV 1200.png
HD 210334 région H & K
HD 210334 chromospherique UV 1200.png (135.49 KiB) Viewed 3859 times


HD 210334 Zoom UV 1200.png
zone H & K
HD 210334 Zoom UV 1200.png (94.56 KiB) Viewed 3859 times


Le SNR est semble-t-il OK mais je ne sais pas l'estimer ! comment faire sous ISIS ?

Pierre
Dubreuil Pierre
 
Posts: 137
Joined: Sat Oct 01, 2011 12:34 pm

Re: Chromospheric active stars: a key program for amateurs

Postby Kevin Gurney » Sat May 16, 2020 7:52 pm

Hi there

My interest was piqued by this project so I tried a few targets....

sig Crb (HD 146361), Xi Boo (HD 131156) and Chi Dra.

My first post here, and not sure how to supply images (FAQ says they have to be on a public server...? Agh - I see you can attach and place inline)

I used two calibration lines (3948.979A, and 4044.418A) in the Lhires Neon lamp which are due to traces of Argon I believe (I hadn't changed to the Argon/neon lamp). I reverse engineered them from the spectral features, and the NIST database.

If I follow this further, I'll change the lamp!

I used a C11 with Atik460EX. Location is suburban area.


Xi_Boo_21_April_KG.png
Xi Boo 21 April
Xi_Boo_21_April_KG.png (87.97 KiB) Viewed 1739 times

Chi_Dra_6_May_KG.png
Chi Dra 6 May
Chi_Dra_6_May_KG.png (79.66 KiB) Viewed 1739 times

sig_crb_22_April_KG.png
sig Crb 22 April
sig_crb_22_April_KG.png (67.88 KiB) Viewed 1739 times


best regards

Kevin
Kevin Gurney
 
Posts: 5
Joined: Tue Nov 27, 2018 5:42 pm
Location: Sheffield, UK

Re: Chromospheric active stars: a key program for amateurs

Postby Christian Buil » Sat May 16, 2020 9:16 pm

Hi Kevin, excellent H&K spectra. I suspect you use a Lhires III 2400 l/mm + 23 microns slit. It's OK ?
(not easy to calibrate, fine use of faint argon lines)

Christian
Christian Buil
 
Posts: 1377
Joined: Mon Sep 26, 2011 6:59 pm

PreviousNext

Return to Spectra, results, information on activity ...

Who is online

Users browsing this forum: No registered users and 4 guests

x