| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 130, Number 3, June II 1998
|
|
|---|---|---|
| Page(s) | 495 - 500 | |
| DOI | https://doi.org/10.1051/aas:1998420 | |
| Published online | 15 June 1998 | |
BVR photometry of comparison stars in selected blazar fields
II. Photometric sequences for 9 quasars
1
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: emailraiteri@to.astro.it
Received:
22
December
1997
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