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Multi-band optical micro-variability observations of BL Lacertae
I. E. Papadakis, P. Boumis, V. Samaritakis +1
We have observed BL Lacertae in the B, R and I bands for 2 nights in July, 1999, and 3 nights in July, 2001. The observations resulted in almost evenly sampled light curves, with a…
New Planetary Nebulae in the Galactic Bulge region with l>0deg - I. Discovery method and first results
Panayotis Boumis, Euthimios V. Paleologou, Fotis Mavromatakis +1
We present the first results of an [O III] 5007 A interference filter survey for Planetary Nebulae (PNe) in the Galactic bulge. Covering (at first) the 66 per cent of the survey ar…
Optical Survey of Planetary Nebulae in the northern Galactic Bulge
Panayotis Boumis, John Papamastorakis
We present preliminary results of an optical survey for Planetary Nebulae (PNe) in the northern part of the Galactic Bulge. In particular, observations at wavelengths corresponding…
First optical light from the supernova remnant G 17.4-2.3
P. Boumis, F. Mavromatakis, E. V. Paleologou
Deep optical CCD images of the supernova remnant G 17.4-2.3 were obtained and faint emission has been discovered. The images, taken in the emission lines of Halpha+[N II], [S II] a…
Imaging and spectroscopy of the faint remnant G 114.3+0.3
F. Mavromatakis, P. Boumis, E. V. Paleologou
We present the first calibrated CCD images of the faint supernova remnant G 114.3+0.3 in the emission lines of [OII], [OIII], Halpha+[NII] and [SII]. The deep low ionization CCD im…