spectro-aras.com

I've asked Tamas Tordai to prepare his simultaneous observation serie, covering also my time. He has prepared for us these graphs (JUN.7 - JUN.11 at this time), he is mostly doing differential photometry with a clear filter: asassn-19om_Tamas_Tordai_0607_0609.gif Summary of first 3 days since alert:...

Hello Robin, no I can't find anything conclusive (besides the fact that of course, the intensities vary): Ha_HeII4686_velocities_75pct.jpg (In raw ADU unit, no response calibration - except flat/bias/dark, and disabled cosmic ray removal for this graph) Other lines too noisy or obviously inconclusiv...

Glad to see it's an interesting object, yesterday night made a repeat with the same setup: asassn-19om_20190607_vs_0608.png I believe the target has faded a lot, hence the narrow spikes should be coming from noise on the new spectrum. Verified also the continuum's blue fade validity (taken Iot Cyg 3...

Fresh result from last night, switching to the Alpy setup quickly when received the vsnet-alert: guide_asassn-19om_20190607_889.jpg 6 x 30 minute, 300/1200 Newton + Alpy 600 (18 micron slit), ATIK 414 EXm camera: asassn-19om_20190607_889.png Strong and narrow Balmer and He I lines + HeII 4686 presen...

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_3comp...

Nice spectra gathered up here, especially the 15cm scope with 19 micron slit at high resolution! However, my intention is using the 35 micron further (giving my 12"-scope access to RS CVn, CH Cyg and VV Cep in this region...). Besides resolution, I suspect the S-index formula will be also depen...

Benji, The article doesn't explicitly says, but my co-authorship is only observational (offered to me by the author), due to having observation in the ARAS DB at critical time with no others or professional optical spectra around (Umberto's case should be similar to mine). The author was more focusi...

Thank you Benji for the reference correction and the look! You are true, this document is comparing 2 techniques. However, in 2.3 it is clearly stated that " The spectral subtraction technique provides better results when..." - something that applies for BF Lyn - e.g. multiple lines to deb...

Hello again, During vacation + 2 clear skies, I've made further experimental progress on this area. On 04.15, I've been shooting repeats of stars Christian mentioned, attaching as a zip (so everyone can compare). No heliocentric correction made. One of the interesting repeated star of SNR perspectiv...

Nice (and perhaps longterm) program Christian, once there is a public database to see it online which star deserves coverage at the given moment - I'd certainly shoot 1-2 of such targets occasionally (including other target types). I'd also suggest having a reference target to occasionally check and...