S5 1803+78
Type: BLLAC Extragalactic BL Lacertae
AAVSO lightcurve (2020 )
AAVSO lightcurve (index)
Extragalactic BL Lacertae-type objects are compact quasi-stellar objects showing
almost continuous spectra with weak emission and absorption lines and relatively rapid
irregular light changes with amplitudes up to 3 magnitudes in V or more. Sources of
strong X-ray radiation and radio waves, their emission displays strong and variable
linear polarization in the visible and infrared spectral regions.
AAVSO Special Notice #407 2 September 2015, Blazar S5 1803+78 active
AAVSO observer Adolfo Darriba Martinez y Oscar Ortuo (DAM, Observatorio Las
Casqueras, Madrid, Spain) reports that the blazar S5 1803+78 has brightened
significantly. S5 1803+78, which is magnitude 16-17 V at minimum, is currently
magnitude 14.237 V (LPAB, P. Lampens- Vancauteren (Ukkel, Belgium). Previous
outbursts are recorded in the AAVSO International Database in November 2007,
February 2012, and September 2014.