SU Lyn Call for observations by Katarzyna Drozd

[Olivier GARDE]

A comparison between 2 spectra taken about 1 month interval (28th march and yesterday).

H Alpha and H beta line intensity increase about 60% (corrected from heliocentric velocity)

[Francois Teyssier]

Je l'ai observée également hier soir

Mise à jour du suivi :

sulyn_ha.png (46.11 KiB) Viewed 11993 times

François

[Jacques Montier]

Hello,

My contribution to SU Lyn

20170421_sulyn.png (50.3 KiB) Viewed 11981 times

Regards,

[James Foster]

Hi. Here is my latest low resolution (R= 993) spectra of SU Lyn (11X90sec 2x2 bin exposures with the CDK17 at F/6.8):

Per previous advice, I scaled the spectrum "long" on the Y-axis to bring up more detail on the shorter-wavelength side of the spectrum.

I'll try to get one more high resolution (Grating 1800 l/mm) spectra of the Ha region of SU Lyn before it slips behind my house in the next week or two.

James

[umberto sollecchia]

Bonjour, mon observation de 25/04/2017.
Umberto

Profilo SU _Lyn.png (8.02 KiB) Viewed 11898 times

[JP Nougayrede]

Buongiorno,
SU Lyn en basse résolution le 20.8/04/2017, flux absolu, pour référence HD 50420 (V 6.15 à 5293A)
Bon ciel,
Jean-Philippe

SULyn.png (27.5 KiB) Viewed 11873 times

[Francois Teyssier]

Impeccable, Jean-Pierre, j'attends ton spectre pour la base

James:
- OK for the Ca II absorptions
- HI balmer exist but are not visible at such a resolution (for this star at this phase)
- The other identifications (Ca and Cl) are wrong
You have only the variations of the pseudo contnuum
Cl III is not a common line in symbiotics. It appears, faint, in some planetary nebula
Highly ionized Ca lines can be observed in some symbiotics but require higher resolution

For lines identification, I suggest you choose stars with strong emissions, such as AG Dra, CI Cyg, CH Cyg, BF Cyg ...

François

[James Foster]

To: François

RE:"James:
- OK for the Ca II absorptions
- HI balmer exist but are not visible at such a resolution (for this star at this phase)
- The other identifications (Ca and Cl) are wrong
You have only the variations of the pseudo contnuum
Cl III is not a common line in symbiotics. It appears, faint, in some planetary nebula
Highly ionized Ca lines can be observed in some symbiotics but require higher resolution..."

Ok. I reverted to my more trusty Bass V1.96 plot....will stick with that for awhile; hopefully the Fe at 4226A is real.
Wasn't that comfortable with Plotspectra in any case....

I'll leave the non-balmer lines out of the spectra to be less controversial.
Isis is almost too powerful for this novice user!

Sincerely

James

[umberto sollecchia]

Bonjour à tous, placez l'observation du jour 05/05/2017.
Umberto

Profilo SU Lyn.png (7.75 KiB) Viewed 11744 times

[Francois Teyssier]

SU Lyn tonight
Impressive change in the absorption of H alpha

François