Host galaxy subtraction of TeV candidate BL Lacertae objects

Abstract

We have derived R-band host galaxy fluxes of 20 TeV candidate BL Lacertae objects as a function of aperture radius and FWHM. The results are given as correction tables, that list the fluxes (in mJy) of all ``contaminating'' sources (host galaxy + significant nearby objects) as a function of aperture radius and FWHM. We found that the derived fluxes depend strongly on aperture radius, but the FWHM has only a minor effect (a few percent). We also discuss the implications of our findings to optical monitoring programs and potential sources of error in our derived fluxes. During this work we have also constructed new calibration star sequences for 9 objects and present the finding charts and calibrated magnitudes.

Accepted for publication in A&A, 24 pages, 6 figures, 3 minor typos corrected

Cited by in corpus (4)

• Simultaneous multiwavelength observations of the blazar 1ES1959+650 at a low TeV flux
• INTEGRAL observations of the blazar Mrk 421 in outburst (Results of a multi-wavelength campaign)
• The debeamed luminosity, sychrotron peak frequency and black hole mass of BL Lac objects
• Incidence of the host galaxy on the measured optical linear polarization of blazars