The Hamburg Quasar Monitoring program (HQM) at Calar Alto. II. Lightcurves of weakly variable objects
Abstract
HQM is an optical broad-band photometric monitoring program carried out since Sept. 1988. We use a CCD camera equipped to the MPIA 1.2 m telescope. Fully automatic photometric reduction relative to stars in the frames is done within a few minutes after each exposure, thus interesting brightness changes can be followed in detail. The typical photometric error is 1-2% for a 17.5 mag quasar. We here present lightcurves already evaluated but not shown in Paper I. We also discuss existing literature data.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- May 1994
- DOI:
- 10.48550/arXiv.astro-ph/9403049
- arXiv:
- arXiv:astro-ph/9403049
- Bibcode:
- 1994A&AS..104..473S
- Keywords:
-
- QUASARS: GENERAL;
- TECHNIQUES: PHOTOMETRIC;
- Astrophysics
- E-Print:
- Astron. &