Tuorla Quasar Monitoring (Katajainen+ 2000)

Details Tuorla Quasar Monitoring (Katajainen+ 2000) Tuorla Quasar Monitoring (Katajainen+ 2000)

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ycat..41430357k&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/143/357. Originally published in: 2000A&AS..143..357K

Other

Qsos, Photometry: Ubvri, Photometry: Ccd

Scientific paper

The observations presented in table 3 were made by using the 1.03m Dall-Kirkham-type telescope (f/8.45) of Tuorla Observatory with a SBIG ST-8 CCD-camera and a standard V-band filter. Table 4 includes data (B-, V- , and R-bands) observed at the Nordic Optical Telescope (NOT) on La Palma. Corrections for dark-current effects, additive effects (bias) and multiplicative effects (flatfield) were applied. Due to the relatively small field of view of the telescope separate frames of comparison stars were exposed for Mrk 421 and 4C 29.45. For the other objects normal differential photometry methods were applied. Exposure times with the Tuorla 1.03 meter telescope were between 60 and 240 seconds for objects brighter than 16 mag. For fainter objects, we have combined several exposures to achieve a sufficiently high signal to noise ratio. (3 data files).

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