Spectra of AZ Cas taken in the blue are showing dramatic changes associated with impending ingress. (see attached raw spectra) Absorption lines from the outer atmosphere of the M star have appeared superimposed on the M star spectrum.
Robin
www.threehillsobservatory.co.uk [1]
| Attachment | Size |
|---|---|
| AZCas_20121021_1117_annot.jpg [2] | 48.73 KB |
Links:
[1] http://www.threehillsobservatory.co.uk
[2] http://www.aavso.org/sites/default/files/AZCas_20121021_1117_annot_0.jpg
[3] http://www.aavso.org/forums/variable-star-observing/campaigns-observation-reports
