3C 390.3 BVRI and H photometry (Dietrich+, 1998)

Computer Science

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Active Gal. Nuclei, Photometry: Ubvri, Photometry: H-Alpha, Photometry: H-Beta, Photometry: H-Gamma

Scientific paper

Results of a ground-based optical monitoring campaign on 3C 390.3 in 1994-1995 are presented. The broadband fluxes (B, V, R, and I), the spectrophotometric optical continuum flux Fλ(5177Å), and the integrated emission-line fluxes of Hα, Hβ, Hγ, He I 5876, and He II λ4686 all show a nearly monotonic increase with episodes of milder short-term variations superposed. The amplitude of the continuum variations increases with decreasing wavelength (4400-9000Å). The optical continuum variations follow the variations in the ultraviolet and X-ray with time delays, measured from the centroids of the cross-correlation functions, typically around 5 days, but with uncertainties also typically around 5 days; zero time delay between the high-energy and low-energy continuum variations cannot be ruled out. The strong optical emission lines Hα, Hβ, Hγ, and He I λ5876 respond to the high-energy continuum variations with time delays typically about 20 days, with uncertainties of about 8 days. There is some evidence that He II λ4686 responds somewhat more rapidly, with a time delay of around 10 days, but again, the uncertainties are quite large (~8 days). The mean and rms spectra of the Hα and Hβ line profiles provide indications for the existence of at least three distinct components located at +/-4000 and 0km/s relative to the line peak. The emission-line profile variations are largest near line center. (16 data files).

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

3C 390.3 BVRI and H photometry (Dietrich+, 1998) 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 3C 390.3 BVRI and H photometry (Dietrich+, 1998), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 3C 390.3 BVRI and H photometry (Dietrich+, 1998) will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-848126

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.