Monitoring of active galactic nuclei. I. The quasars 1302-102 and 1217+023

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Presents the results of a five-month spectroscopic monitoring campaign of two radio-loud quasars PKS 1217+023 and PKS 1302-102. There is a pronounced lack of variability in 1302-102 apart from a possible small change in the continuum level near the end of the monitoring period, but 1217+023 underwent a 20% continuum decrease in the middle of the campaign. No line variability at all was observed. The co-added data represent two of the best spectra yet obtained of any radio-loud quasar other than 3C 273, and the shape of the Hbeta line and the presence underneath it of other contaminating lines are well determined. The Hbeta broad line in 1302-102 is redshifted by 3 Aring with respect to the narrow line region and there is evidence for a separate broad Hbeta feature on top of the main Hbeta emission in both quasars. This feature is stronger in 1217+023 than in 1302-102

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
Experimental/ astronomical spectra
galactic nuclei
quasars
red shift
spectral line breadth
visible astronomical observations/ H beta line relative redshift
AD 1990 01 02 to 06 04
QSOs broad-line regions geometry
Hbeta line profile
optical continuum variations
quasars optical spectra
quasar classification schemes
redshift 0.240
redshift 0.286
active galactic nuclei
spectroscopic monitoring campaign
radio-loud quasars
PKS 1217+023
PKS 1302-102
line variability
Hbeta broad line
narrow line region
separate broad Hbeta feature
main Hbeta emission
200 km/s
486.1 nm
476 to 660 nm/ A9870J Quasars A9580J Photographic region astronomical observations A9850H Red shift
distances
and spatial distribution of galaxies/ velocity 2.0E+05 m/s
wavelength 4.861E-07 m
wavelength 4.76E-07 to 6.6E-07 m

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