2000ApJS..130..165W

Query : 2000ApJS..130..165W

2000ApJS..130..165W - Astrophys. J., Suppl. Ser., 130, 165-176 (2000/September-0)

Comparison star sequences for optical photometry of active galactic nuclei and quasars.

WEBB W. and MALKAN M.

Abstract (from CDS):

As part of a campaign to monitor 23 quasars and Seyfert 1 galaxies on timescales of minutes to a few months, we obtained broadband relative photometry of more than 140 different ``comparison'' stars. We attained typical 1 σ flux uncertainties of 2% through differential photometry of field stars in the same CCD frames as the active galactic nuclei (AGNs). These stars form i-band (λeff∼0.7 µm), yellow (0.59 µm), and blue (0.45 µm) photometric sequences for the further monitoring of these AGNs. For about half these fields, we use absolute photometry to calibrate the relative magnitudes. Finding charts, filter prescriptions, comparison star relative photometry, and some tentative variable star identifications are presented. Also included are the foundations of the AGN photometry, which appears in a companion paper in The Astrophysical Journal.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Active - Galaxies: Photometry - Galaxies: Seyfert - Galaxies: Quasars: General

Nomenclature: Table 2: [WM2000b] MCG +8-11-11 N (Nos 1-7), [WM2000b] Mrk NNN N (Nos 1-7)x11, [WM2000b] Ton 951 N (Nos 1-7), [WM2000b] NGC NNNN N (Nos 1-7)x4, [WM2000b] 3C NNN N (Nos 1-7)x2, [WM2000b] PG HHMM+DD N (Nos 1-7)x2, [WM2000b] I Zw 92 NN (Nos 1-11), [WM2000b] II Zw 136 NN (Nos 1-12).

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Hilt 102 * 01 09 05.0413038576 +62 47 30.268502016 10.88 11.10 10.42     B0III 53 0
2 BD+12 237 * 01 49 09.4876255128 +13 33 11.799646344   10.38 10.19     sdA0IVHe1 94 0
3 HD 19445 Pe* 03 08 25.5883873084 +26 19 51.400965175 8.29 8.52 8.06 7.60 7.27 G2VFe-3 801 0
4 HZ 15 HS* 04 40 39.3324302472 +08 40 45.409971828   12.580 12.600     sdB2IIHe15 36 0
5 Z 232-3 Sy1 05 54 53.6080860768 +46 26 21.624853488   15.37 14.62     ~ 563 3
6 HD 289002 * 06 45 13.3725491952 +02 08 14.685250596 10.06 10.62 10.44     B1 277 0
7 Mrk 376 Sy1 07 14 15.0840050688 +45 41 55.900253292   15.17 14.62     ~ 194 1
8 Z 235-30 Sy1 07 42 32.8210670808 +49 48 34.783809768   14.74 14.27     ~ 769 1
9 Ton 951 Sy1 08 47 42.4485615096 +34 45 04.482515304   14.83 14.50     ~ 487 0
10 Mrk 110 Sy1 09 25 12.8479065576 +52 17 10.386311208   16.82 16.41     ~ 681 1
11 Z 62-35 Sy1 09 26 03.2694421008 +12 44 03.732389268   15.15 14.60     ~ 359 0
12 HD 84937 Pe* 09 48 56.0992891997 +13 44 39.326709913 8.49 8.68 8.32 7.97 7.70 F8Vm-5 831 0
13 NGC 3227 Sy1 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1807 2
14 Mrk 142 Sy1 10 25 31.2786898344 +51 40 34.867889004   16.33 16.12     ~ 330 0
15 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 731 0
16 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3938 2
17 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
18 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
19 2XMM J135315.8+634546 Sy1 13 53 15.8311116864 +63 45 45.683126676   14.54 14.28     ~ 404 1
20 LEDA 50824 Sy1 14 13 48.3306274368 +44 00 14.003371296   14.99 14.99     ~ 402 0
21 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2895 0
22 Z 296-15 Sy1 14 36 22.0820611632 +58 47 39.394934844   14.19 13.79     ~ 592 0
23 Z 273-23 Sy2 14 40 38.0960806920 +53 30 15.961505184   16.05 15.03     ~ 341 1
24 Mrk 478 Sy1 14 42 07.4714418744 +35 26 22.938625500   14.91 14.58     ~ 567 1
25 Mrk 290 Sy1 15 35 52.4031021552 +57 54 09.515660508   15.55 15.27     ~ 575 0
26 Mrk 486 Sy1 15 36 38.4011947776 +54 33 33.215039244   15.21 14.78     ~ 292 1
27 IC 4665 27 * 17 43 55.8394428292 +05 24 48.245014179   10.46 10.21     A3V 82 0
28 Z 173-14 Sy1 18 35 03.3896172576 +32 41 46.855964616   16.50 15.39 10.50   ~ 688 1
29 NGC 6814 Sy1 19 42 40.5862186152 -10 19 25.108718844   15.33 14.21 11.7 11.3 ~ 866 0
30 HD 338808 HS* 19 44 26.1391859472 +26 13 16.683280608 10.92 11.03 10.47     sdB0.5VIpHe9 98 0
31 Mrk 509 Sy1 20 44 09.7504483224 -10 43 24.727155528   13.35 13.12 10.7   ~ 1370 0
32 Mrk 1513 Sy1 21 32 27.8162556672 +10 08 19.252365396   14.92 14.64     ~ 651 0

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