T CrB update
https://www.astronomerstelegram.org/?read=17030Il semble bien que l’intensité de la raie H_alpha augmente sensiblement depuis l’été dernier !
Which my Français-de-chien translates as "It seems that the intensity of the H_alpha line [in the emission spectrum] is considerably stronger now than last summer. Which was specifically one of the things Schaeffer was mentioning as needing close monitoring in his alert of 10 months ago. It hasn't "gone" yet, but that's what would be expected in the run-up to an outburst.
Merci beaucoup à Alain Lecacheux at [PSM observatory], Alain Figer, Al Grycan and Jean Lecacheuxfor the "heads-up!"
Further update
https://www.astronomerstelegram.org/?read=170410Overall, given the rapid and drastic increase in intensity and width of the Hα profile, we strongly anticipate that the T CrB outburst may occur soon.
Spectroscopy on Jan 15, 29 and Feb 07 continue to show rapid increases in the H&aplha; line, in both intensity and width (indicating a larger size of the accretion disc).
In other words, thinga are hotting-up.
Similar changes have been observed in other "cataclysmic variables" in thye run-up to recent outbursts, though none have the historical record of reaching naked-eye visibility that T CrB has. You probably won't need to carry sunglasses all night, unless you're wanting to pose.
I don't see other mention of T CrB in other ATels back to mid-January.
