Johnson-Cousins magnitudes of comparison stars in the fields of ten Seyfert galaxies

Details Johnson-Cousins magnitudes of comparison stars in the fields of ten Seyfert galaxies Johnson-Cousins magnitudes of comparison stars in the fields of ten Seyfert galaxies

2007-11-08

arxiv.org/abs/0711.1212v2

Astronomy and Astrophysics

Astrophysics

Accepted for publication in Astronomische Nachrichten, the article title shortened

Scientific paper

10.1002/asna.200710850

We present UBVRcIc magnitudes of 49 comparison stars in the fields of the Seyfert galaxies Mrk 335, Mrk 79, Mrk 279, Mrk 506, 3C 382, 3C 390.3, NGC 6814, Mrk 304, Ark 564, and NGC 7469 in order to facilitate the photometric monitoring of these objects; 36 of the stars have not been calibrated before. The comparison stars are situated in 5x5 arcmin fields centred on the Seyfert galaxies, their V band flux ranges from 11.7 to 18.2 mag with a median value of 16.3 mag, and their B-V colour index ranges from 0.4 to 1.6 mag with a median value of 0.8 mag. The median errors of the calibrated UBVRcIc magnitudes are 0.08, 0.04, 0.03, 0.04, and 0.06 mag, respectively. Comparison stars were calibrated for the first time in three of the fields (Mrk 506, 3C 382, and Mrk 304). The comparison sequences in the other fields were improved in various aspects. Extra stars were calibrated in four fields (Mrk 335, Mrk 79, NGC 6814, and NGC 7469) - most of these stars are fainter and are situated closer to the Seyfert galaxies compared to the existing comparison stars. The passband coverage of the sequences in five fields (Mrk 335, Mrk 79, Mrk 279, NGC 6814, and Ark 564) was complemented with U band.

Affiliated with

Also associated with

No associations

Rating

Johnson-Cousins magnitudes of comparison stars in the fields of ten Seyfert galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Johnson-Cousins magnitudes of comparison stars in the fields of ten Seyfert galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Johnson-Cousins magnitudes of comparison stars in the fields of ten Seyfert galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-377417