SIMBAD references

2008MNRAS.386..819O - Mon. Not. R. Astron. Soc., 386, 819-825 (2008/May-2)

Optical monitoring of the z = 4.40 quasar Q2203+292.

OVCHAROV E.P., NEDIALKOV P.L., VALCHEVA A.T., IVANOV V.D., TIKHONOV N.A., STANEV I.S., KOSTOV A.B. and GEORGIEV T.B.

Abstract (from CDS):

We report Cousins R-band monitoring of the high-redshift (z = 4.40) radio-quiet quasar Q2203+292 from 1999 May to 2007 October. The quasar shows maximum peak-to-peak light curve amplitude of ∼0.3 mag during the time of our monitoring, and ∼0.9 mag when combined with older literature data. The rms of a fit to the light curve with a constant is 0.08 and 0.2 mag, respectively. The detected changes are at ∼3σ level. The quasar was in a stable state during the recent years and it might have undergone a brightening event in the past. The structure function analysis concluded that the object shows variability properties similar to those of the lower redshift quasars. We set a lower limit to the Q2203+292 broad-line region mass of 0.3-0.4Msolar. Narrow-band imaging search for redshifted Lyα from other emission-line objects at the same redshift shows no emission-line objects in the quasar vicinity.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): quasars: general - quasars: individual: Q2203+292

CDS comments: Standard stars are not in Simbad except Star A : USNO-B1.0 1195-0563359 and Star B : USNO-B1.0 1195-0563356

Simbad objects: 8

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2020.01.27-02:11:56

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