J/AJ/104/28 JHKL photometry of BL Lac Objects (Bersanelli+ 1992)
Homogeneous JHKL photometry of a sample of BL Lac Objects
Bersanelli M., Bouchet P., Falomo R., Tanzi E.G.
<Astron. J. 104, 28 (1992)>
=1992AJ....104...28B 1992AJ....104...28B
ADC_Keywords: BL Lac objects; Photometry, infrared
Description:
Homogeneous J, H, K, L, photometry of 42 BL Lacertae objects is
presented. The observations cover a period of 3 yr with a typical
time interval of 6 months.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 76 42 Program Objects
table2.dat 68 135 JHKL Fluxes
table3.dat 52 42 Spectral indices
refs.dat 73 42 References
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name BL Lac name
10- 11 I2 h RAh Right Ascension J2000 (hours) (1)
13- 14 I2 min RAm Right Ascension J2000 (minutes) (1)
16- 19 F4.1 s RAs Right Ascension J2000 (seconds) (1)
21 A1 --- DE- Declination J2000 (sign) (1)
22- 23 I2 deg DEd Declination J2000 (degrees) (1)
25- 26 I2 arcmin DEm Declination J2000 (minutes) (1)
28- 29 I2 arcsec DEs Declination J2000 (seconds) (1)
31- 35 F5.3 --- z ? Redshift
39- 42 F4.2 mag Av Absorption
47 A1 --- X/R X or Radio flag
49- 67 A19 --- Comments Free-text comments
69- 76 A8 --- r_Comments Comma-separated list of references
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Note (1): position added from SIMBAD data-base
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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 --- Name BL Lac name
10- 20 F11.3 JD JD Julian Date of observation
22- 26 F5.2 mJy Jmag ? Flux in filter
28- 32 F5.2 mJy e_Jmag ? mean error on J
34- 38 F5.2 mJy Hmag ? Flux in filter
40- 44 F5.2 mJy e_Hmag ? mean error on H
46- 50 F5.2 mJy Kmag ? Flux in filter
52- 56 F5.2 mJy e_Kmag ? mean error on K
58- 62 F5.2 mJy Lmag ? Flux in filter
64- 68 F5.2 mJy e_Lmag ? mean error on L
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name BL Lac name
10 A1 --- Note Notes (1)
13- 17 F5.2 --- Sp-Index ? spectral index (F proportional (nu)**(-a)
20- 21 I2 --- Nobs Number of observations
23- 27 F5.2 --- amin ? Minimal value of spectral index
30- 33 F4.2 --- e_amin ? mean error on amin
35- 39 F5.2 --- amax ? Maximal value of spectral index
43- 46 F4.2 --- e_amax ? mean error on amax
50- 52 I3 % pcGal ? Fractional estimated flux contribution of
the host galaxy to the observed spectrum.
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Note (1):
a) Near a bright star
b) Significant positive curvature
c) Spectral index is derived after subtraction of the thermal component
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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2- 3 I2 --- RefNum Reference number
5- 23 A19 --- BibCode The 19-digit bibcode, when existing
25- 74 A50 --- Text Authors
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History:
* 19-Mar-1993: Tables received from Marco Bersanelli
* 11-Apr-2000: Added file refs.dat
(End) Francois Ochsenbein [CDS] 11-Apr-2000