A historical light curve of ON 231 and its periodic analysis

Details A historical light curve of ON 231 and its periodic analysis A historical light curve of ON 231 and its periodic analysis

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...295....1l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 295, no. 1, p. 1-10

Astronomy and Astrophysics

Astrophysics

65

Active Galactic Nuclei, Bl Lacertae Objects, Brightness Distribution, Light Curve, Periodic Variations, Astronomical Photography, Fourier Analysis, Line Spectra, Linear Polarization, Long Term Effects

Scientific paper

All data in the B band for BL Lac object ON 231 have been compiled into a light curve from twenty-six publications, dating back to 1982; 560 values are available. The light curve shows that ON 231 is very active and exhibits very complicated non-sinusoidal variations. The light curve probably consists of three kinds of behaviors. The first may be non-periodic or with a period at least longer than the duration of historical observations. In this case, the source seems to maintain two states of intensities, changing in mean behavior from a bright level with mean B magnitude 15.45 to a faint level with about 16.45 mag between 1969 and 1972. After detailed Jurkevich V2m test analysis, we found that the second is periodic, with a period of 13.6 +/- 1.3 years (or 26.6 +/- 0.8 years) with outburst structure of one magnitude with total width of about 6 years. The third one is sporadic, superposing on the previous two behaviors. The periods of 0.981 +/- 0.005 years (or 2.02, 3.01, ... years) and of a few days are not significant and may be spurious.

Affiliated with

Also associated with

No associations

Rating

A historical light curve of ON 231 and its periodic analysis does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A historical light curve of ON 231 and its periodic analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A historical light curve of ON 231 and its periodic analysis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-881157