B[e] star IRAS 17449+2320: call for observations

[Francois Teyssier]

Great work!
Congratulations to all

A comparison of Tim and Peter spectra (resp. R = 9000 and 15000)
Impressive changes

iras17449+2320b.png (19.37 KiB) Viewed 8931 times

François

[Francisco Campos]

Fantastic spectra from everybody!

Here is my contribution from the last night. I took 12 spectra and did some Johnson V-band photometry (no variation: stable +/-0.005 mag.). Maybe if I reduce all spectra single I will see some kind of variation.

By the way, caution with the H-beta band: it shows some emision profile

_iras17449+2320_20170605_869_FPC.png (7.6 KiB) Viewed 8924 times

iras17449+2320_ 20170605_869_FPC H-beta.png (16.33 KiB) Viewed 8924 times

IRAS 17449+2320.gif (21.78 KiB) Viewed 8921 times

Greetings
Fran

[Paolo Berardi]

Hi all, congratulations for your excellent spectra and photometry.

Joan wrote:

What is the integration time of each?

960 sec. The graph shows six consecutive profiles.

Clear sky!
Paolo

[Joan Guarro Flo]

Hi,
This is my first contribution of the IRAS 17499+2320. I'll try improve the graphics in de next editions..
Joan.

[Tim Lester]

Results for June 08: Halpha region at R=9000 and Hbeta region at R = 6300.

Halpha compared to my last result on the 4th

iras17449+2320_20170608_110_Halpha_tlester.png (20.62 KiB) Viewed 8882 times

iras_1749+2320_20170608_235_HBeta_tlester.png (24.05 KiB) Viewed 8882 times

Tim

[Olivier GARDE]

Spectrum of IRAS 17449+2320 taken last night with my eshel spectrograph and Astrosib RC 400 telescope

[Jacques Montier]

Hello everybody

My contribution to the Be star iras17449+2320

IRAS_17449+2320.png (68.72 KiB) Viewed 8839 times

Best regards

[Paolo Berardi]

Very nice observations! Your spectra prove that there are relatively fast changes. Tim spectrum confirms variations on R-peak h-alpha emission line. Also h-beta line profile changed a lot in just two days. On ArasBeAm the star has an expected observation period of 365 days. I wonder if the star is currently undergoing a particular event. We look forward to read news from François/Steve...

Paolo

[James Foster]

Is there an AASVO Designation/Chart for this object? If there is, I'll take photometry as well as spectra
when I'm at my dark sky/high altitude site starting tomorrow night.

James

[Paolo Berardi]

Hi James, I don't know (it seems not). I used APASS V magnitudes (https://www.aavso.org/apass) included in UCAC4 catalog.

Maybe Fran or someone else can give other suggestions (I'm not expert).

Paolo