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J/A+AS/144/481 BVRI photometry of five X-ray selected BL Lacs (Villata+, 2000)
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Optical observations of five X-ray selected BL Lacertae objects
Villata M., Raiteri C.M., Popescu M.D., Sobrito G., De Francesco G.,
Lanteri L., Ostorero L.
<Astron. Astrophys. Suppl. Ser. 144, 481 (2000)>
=2000A&AS..144..481V
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ADC_Keywords: BL Lac objects ; Photometry, UBVRI
Keywords: BL Lacertae objects: general - BL Lacertae objects: individual:
1ES 0145+138, 1ES 0323+022, 1ES 1028+511, 1ES 1118+424, 1ES 1959+650
Abstract:
We present optical data obtained with the 1.05 m telescope of the
Torino Astronomical Observatory for five X-ray selected BL Lacertae
objects. The data are in the Johnson's B, V, and Cousins' R bands. As
the observing periods include the pointings of the Satellite per
Astronomia X ``Beppo'' (BeppoSAX), our optical information will be
comparable with the X-ray observations for a better understanding of
the properties of these objects. The present data also provide optical
information on sources that have been rarely observed in the optical
band. Variability on short time scales (a few days) was found only for
1ES 1959+650.
Objects:
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RA (2000) DE Designation(s)
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01 48 29.8 +14 02 19 1ES 0145+13.8
03 26 14.0 +02 25 15 1ES 0323+02.2
10 31 19.0 +50 53 30 1ES 1028+51.1
11 20 48.1 +42 12 12 1ES 1118+42.4
19 59 59.9 +65 08 55 1ES 1959+65.0
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tab2-6.dat 39 130 BVRI observations
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See also:
J/A+AS/132/361 : Optical observations of eight BL Lacs (Raiteri+ 1998)
Byte-by-byte Description of file: tab2-6.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- 1ES Object name (1ES hhmm+dd.d)
15- 26 F12.4 d HJD Observation date
28 A1 --- Band [BVRI] Band
30- 34 F5.2 mag mag Magnitude in band (1)
36- 39 F4.2 mag e_mag rms uncertainty on mag
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Note (1): Minumum and maximum magnitudes:
0145+138 R band (20 Nov 96 - 22 Dec 98) min = 17.17 max = 17.61
0145+138 V band (22 Oct 96 - 22 Dec 98) min = 17.87 max = 18.18
0323+022 I band (17 Jan 98 - 14 Oct 98) min = 15.89 max = 16.22
0323+022 R band (17 Dec 96 - 23 Jan 99) min = 16.16 max = 16.83
0323+022 V band (23 Oct 96 - 21 Oct 98) min = 16.77 max = 17.28
0323+022 B band (13 Jan 97 - 17 Jan 98) min = 17.36 max = 17.96
1028+511 R band (03 Dec 96 - 08 May 97) min = 16.53 max = 16.71
1028+511 V band (13 Mar 97 - 01 May 97) min = 16.89 max = 16.97
1028+511 B band (01 May 97) min = 17.24 max = 17.24
1118+424 R band (17 Jan 97 - 21 May 97) min = 16.94 max = 17.26
1959+650 R band (29 Feb 96 - 30 May 97) min = 14.54 max = 15.05
1959+650 V band (08 Apr 96 - 09 May 97) min = 15.00 max = 15.54
1959+650 B band (08 Apr 96 - 09 May 97) min = 15.58 max = 16.14
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Acknowledgements: Massimo Villata <VILLATA@otoax3.to.astro.it>
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(End) Patricia Bauer [CDS] 19-Jun-2000