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The classification of BL Lacertae objects: the Ca H&K break |
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| Authors: | Hermine Landt Paolo Padovani †‡ Paolo Giommi |
| Institution: | Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA;Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany;ASI Science Data Centre, c/o ESRIN, Via G. Galilei, I-00044 Frascati, Italy |
| Abstract: | |
| Keywords: | BL Lacertae objects: general |