J/AN/329/418 UBVRcIc photometry in fields of Seyfert galaxies (Mihov+, 2008)
Johnson-Cousins magnitudes of comparison stars in the fields of ten
Seyfert galaxies.
Mihov B.M., Slavcheva-Mihova L.S.
<Astron. Nachrichten, 329, 418-425 (2008)>
=2008AN....329..418M 2008AN....329..418M
ADC_Keywords: Galaxies, Seyfert ; Stars, standard ; Photometry, UBVRI
Keywords: galaxies: Seyfert - techniques: photometric
Abstract:
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 5x5arcmin fields centred on the Seyfert galaxies, their V
band flux ranges from 11.7 to 18.2mag with a median value of 16.3mag,
and their B-V colour index ranges from 0.4 to 1.6mag with a median
value of 0.8mag. The median errors of the calibrated UBVRCIC
magnitudes are 0.08, 0.04, 0.03, 0.04, and 0.06mag, 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 the U band.
Description:
All observations were done by the authors using the 2-m telescope of
NAO during the period 1997-2003.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 89 10 List of selected Seyfert galaxies
table2.dat 114 49 Apparent Johnson-Cousins UBVRcIc magnitudes of
the comparison stars
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See also:
J/other/Ap/48.304 : BVRI of comparison stars in AGN fields (Doroshenko+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Gal Galaxy name (1)
10- 47 A38 --- ONames Other name(s) (1)
49- 50 I2 h RAh Right ascension (J2000) (1)
52- 53 I2 min RAm Right ascension (J2000) (1)
55- 60 F6.3 s RAs Right ascension (J2000) (1)
62 A1 --- DE- Declination sign (J2000) (1)
63- 64 I2 deg DEd Declination (J2000) (1)
66- 67 I2 arcmin DEm Declination (J2000) (1)
69- 73 F5.2 arcsec DEs Declination (J2000) (1)
75- 81 F7.5 --- z Redshift (1)
83- 85 F3.1 --- SyType Seyfert type (1)
87 A1 --- N Number of different observing nights
89 I1 --- n ? Number of nights used in the internal check for
variability of the newly calibrated stars (2)
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Note (1): Data taken from NED.
Note (2): No n value means that no new comparison stars were added to the
corresponding fields
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Gal Galaxy name
11 A1 --- Star [A-G] Star designation (1)
13 A1 --- OName1 Other name
14- 16 A3 --- r_OName1 Reference for OName1 (2)
18- 19 A2 --- OName2 Other name
20 A1 --- r_OName2 Reference for OName2 (2)
22 A1 --- OName3 Other name
23 A1 --- r_OName3 Reference for OName3 (2)
25- 26 I2 h RAh Right ascension (J2000)
28- 29 I2 min RAm Right ascension (J2000)
31- 36 F6.3 s RAs Right ascension (J2000)
38 A1 --- DE- Declination sign (J2000)
39- 40 I2 deg DEd Declination (J2000)
42- 43 I2 arcmin DEm Declination (J2000)
45- 49 F5.2 arcsec DEs Declination (J2000)
51- 55 F5.2 mag Umag ?=- Johnson U magnitude
57- 60 F4.2 mag e_Umag ?=- rms uncertainty on Umag
62 I1 --- o_Umag ?=- Number of individual estimates used to
obtain the final U magnitude
64- 68 F5.2 mag Bmag Johnson B magnitude
70- 73 F4.2 mag e_Bmag rms uncertainty on Bmag
75 I1 --- o_Bmag Number of individual estimates used to
obtain the final B magnitude
77- 81 F5.2 mag Vmag Johnson V magnitude
83- 86 F4.2 mag e_Vmag rms uncertainty on Vmag
88 I1 --- o_Vmag Number of individual estimates used to
obtain the final V magnitude
90- 94 F5.2 mag Rcmag ?=- Cousins R magnitude
96- 99 F4.2 mag e_Rcmag ?=- rms uncertainty on Rcmag
101 I1 --- o_Rcmag ?=- Number of individual estimates used to
obtain the final Rc magnitude
103-107 F5.2 mag Icmag ?=- Cousins I magnitude
109-112 F4.2 mag e_Icmag ?=- rms uncertainty on Icmag
114 I1 --- o_Icmag ?=- Number of individual estimates used to
obtain the final Ic magnitude
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Note (1): Stars identified as [MS2008] Gal A in Simbad.
Note (2): References as follows:
a = Penston et al., 1971PASP...83..783P 1971PASP...83..783P, PPS Gal A in Simbad
b = Curry et al., 1998, IAPPP Comm. 73, 18, [SRB2001] in Simbad
c = Bachev et al., 2000A&AS..147..175B 2000A&AS..147..175B, [BSD2000] Gal A in Simbad
d = Shemmer et al., 2001ApJ...561..162S 2001ApJ...561..162S
e = Doroshenko et al., 2005Ap.....48..156D 2005Ap.....48..156D
f = Doroshenko et al., 2005, Cat. J/other/Ap/48.304,
[DSM2005] Gal N in Simbad
The stars without other designations have been calibrated for the
first time by us.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 13-Jun-2008