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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 76 42 Program Objects table2.dat 68 135 JHKL Fluxes table3.dat 52 42 Spectral indices refs.dat 74 42 References
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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
Note (1): position added from SIMBAD data-base
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
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.
Note (1): a) Near a bright star b) Significant positive curvature c) Spectral index is derived after subtraction of the thermal component
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
2- 3 I2 --- RefNum Reference number 5- 23 A19 --- BibCode The 19-digit bibcode, when existing 25- 74 A50 --- Text Authors
History: * 19-Mar-1993: Tables received from Marco Bersanelli * 11-Apr-2000: Added file refs.dat
(End) Francois Ochsenbein [CDS] 11-Apr-2000
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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