Astron. Astrophys. Suppl. Ser.
Volume 130, Number 3, June II 1998
|Page(s)||495 - 500|
|Published online||15 June 1998|
BVR photometry of comparison stars in selected blazar fields
II. Photometric sequences for 9 quasars
Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, Italy
2 Istituto di Fisica Generale dell'Università di Torino, Via P. Giuria 1, I-10125 Torino, Italy
Send offprint request to: C.M. Raiteri, e-mail: email@example.com
Accepted: 28 January 1998
In the course of the blazar monitoring activity at the Torino Astronomical Observatory, we obtained standard BVR magnitudes for 36 stars and standard VR magnitudes for 10 stars in the fields of 9 quasars. Observations were done during 14 photometric nights with the Cassegrain REOSC telescope equipped with a pixel CCD camera. All stars are brighter than and are useful comparison objects for the evaluation of the quasar magnitudes.
Key words: galaxies: active / quasars: general
© European Southern Observatory (ESO), 1998