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

Information about outbursts of eruptive stars, Be activity, ...
Francois Teyssier
Posts: 1520
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
Contact:

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

Post by Francois Teyssier »

Great work!
Congratulations to all

A comparison of Tim and Peter spectra (resp. R = 9000 and 15000)
Impressive changes
iras17449+2320b.png
iras17449+2320b.png (19.37 KiB) Viewed 7403 times
François
Francisco Campos
Posts: 88
Joined: Sun Nov 29, 2015 10:13 pm

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

Post by 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
_iras17449+2320_20170605_869_FPC.png (7.6 KiB) Viewed 7396 times
iras17449+2320_ 20170605_869_FPC H-beta.png
iras17449+2320_ 20170605_869_FPC H-beta.png (16.33 KiB) Viewed 7396 times
IRAS 17449+2320.gif
IRAS 17449+2320.gif (21.78 KiB) Viewed 7393 times
Greetings
Fran
Paolo Berardi
Posts: 578
Joined: Thu Sep 29, 2011 10:51 pm

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

Post by 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
Posts: 611
Joined: Thu Nov 03, 2011 8:50 pm

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

Post by 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.
Attachments
_iras17449+2320_20170607_872_JGF.png
_iras17449+2320_20170607_872_JGF.png (38.67 KiB) Viewed 7362 times
_iras17449+2320_20170607_872_JGF1.png
_iras17449+2320_20170607_872_JGF1.png (18.32 KiB) Viewed 7362 times
_iras17449+2320_20170607_872_JGF2.png
_iras17449+2320_20170607_872_JGF2.png (43.19 KiB) Viewed 7362 times
Tim Lester
Posts: 168
Joined: Fri Apr 04, 2014 6:31 pm
Location: Arnprior Ontario

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

Post by Tim Lester »

Results for June 08: Halpha region at R=9000 and Hbeta region at R = 6300.
iras17449+2320_20170608_110_tlester.png
Halpha compared to my last result on the 4th
iras17449+2320_20170608_110_Halpha_tlester.png
iras17449+2320_20170608_110_Halpha_tlester.png (20.62 KiB) Viewed 7354 times
iras_1749+2320_20170608_235_tlester.png
iras_1749+2320_20170608_235_HBeta_tlester.png
iras_1749+2320_20170608_235_HBeta_tlester.png (24.05 KiB) Viewed 7354 times
Tim
Olivier GARDE
Posts: 1243
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE
Contact:

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

Post by Olivier GARDE »

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

Image

Image

Image

Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Jacques Montier
Posts: 242
Joined: Sun May 13, 2012 2:46 pm

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

Post by Jacques Montier »

Hello everybody

My contribution to the Be star iras17449+2320
IRAS_17449+2320.png
IRAS_17449+2320.png (68.72 KiB) Viewed 7311 times
Best regards
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Paolo Berardi
Posts: 578
Joined: Thu Sep 29, 2011 10:51 pm

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

Post by 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
Posts: 439
Joined: Sun Jan 24, 2016 7:14 am

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

Post by 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
James Foster
eShel2-Zwo ASI6200MM Pro
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope
LISA IR/Visual Spectroscope (IR Configured)
Alpy 200/600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
Paolo Berardi
Posts: 578
Joined: Thu Sep 29, 2011 10:51 pm

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

Post by 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
Post Reply