Access to Astronomical Catalogues

← Click to display the menu
J/A+A/402/1157  Photometric standards around gravitational lenses  (Nakos+ 2003)

A catalog of secondary photometric standard stars around gravitational lenses. Nakos T., Ofek E.O., Boumis P., Cuypers J., Sinachopoulos D., van Dessel E., Gal-Yam A., Papamastorakis J. <Astron. Astrophys. 402, 1157 (2003)> =2003A&A...402.1157N
ADC_Keywords: QSOs ; Gravitational lensing ; Photometry, standards ; Photometry, UBVRI Keywords: techniques: photometry - gravitational lensing - quasars: general Abstract: We present a catalog of secondary photometric standard stars in the neighborhood of 14 gravitationally lensed quasars. These stars were verified to be non variable using long-term monitoring. The instrumental magnitudes of the new standard stars have been transformed to the Johnson-Cousins BV(RI)c photometric system. For ten gravitational lenses (GLs) we also provide the BV(RI)c mean magnitudes of the integrated flux of all the lens components, for the epochs of the photometric calibration. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 101 14 General information regarding the observations on which the selection (Wise Observatory) and the calibration (Skinakas and SAAO Observatories) of the secondary photometric standard stars was based table2.dat 106 42 Photometry and astrometry for the new set of secondary photometric standard stars in the fields of 14 gravitational lenses table3.dat 67 10 Photometry for ten gravitational lenses (integrated flux measured by aperture photometry) tables.tex 188 181 LaTeX version of the tables
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq Sequential number of the gravitational lens 4- 17 A14 --- Lens Gravitational lens name 19- 28 A10 "YYYY/MM/DD" StDate Starting date of the observations at Wise Observatory 30- 39 A10 "YYYY/MM/DD" EnDate Ending date of the observations at Wise Observatory 41- 43 I3 --- NDet ? Total number of frame used for the detection of the non-variable stars 45 I1 --- NCal Number of nights at SAAO and Skinakas used for the calibration to the Johnson-Counsins photometric system 47- 48 I2 --- o_Bmag ? Total number of exposures in B filter 49 A1 --- --- [/] 50- 51 I2 --- o_Vmag ? Total number of exposures in V filter 52 A1 --- --- [/] 53- 54 I2 --- o_Rcmag ? Total number of exposures in Rc filter 55 A1 --- --- [/] 56- 57 I2 --- o_Icmag ? Total number of exposures in Ic filter 59- 68 A10 "DD/MM/YYYY" Date1 Date in which the photometric calibration has been carried out (1) 70- 79 A10 "DD/MM/YYYY" Date2 Date in which the photometric calibration has been carried out (1) 81- 90 A10 "DD/MM/YYYY" Date3 Date in which the photometric calibration has been carried out (1) 92-101 A10 "DD/MM/YYYY" Date4 Date in which the photometric calibration has been carried out (1)
Note (1): For the photometric calibration, systems 7, 8, 13 and 14 were observed at SAAO, while the other systems were observed at Skinakas.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Lens Field name 17 I1 --- NLens Number of star in the field 19- 20 I2 h RAh Right Ascension J2000 (hours) 22- 23 I2 min RAm Right Ascension J2000 (minutes) 25- 29 F5.2 s RAs Right Ascension J2000 (seconds) 32 A1 --- DE- Declination J2000 (sign) 33- 34 I2 deg DEd Declination J2000 (degrees) 36- 37 I2 arcmin DEm Declination J2000 (minutes) 39- 42 F4.1 arcsec DEs Declination J2000 (seconds) 45- 50 F6.3 mag Vmag V magnitude 52- 56 F5.3 mag e_Vmag Mean error on Vmag 58- 63 F6.3 mag B-V ? B-V Johnson-Cousins color index 65- 69 F5.3 mag e_B-V ? Mean error on B-V 71- 76 F6.3 mag V-Rc V-Rc Johnson-Cousins color index 78- 82 F5.3 mag e_V-Rc Mean error on V-Rc 84- 89 F6.3 mag V-Ic V-Ic Johnson-Cousins color index 91- 95 F5.3 mag e_V-Ic Mean error on V-Ic 97-106 A10 --- OName Other name of the gravitational lens
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Lens Gravitational lens name 17- 22 F6.3 mag Vmag V magnitude (1) 24- 28 F5.3 mag e_Vmag rms uncertainty on Vmag (2) 31- 35 F5.3 mag B-V ? B-V colour index (1) 37- 41 F5.3 mag e_B-V ? rms uncertainty on B-V (2) 44- 48 F5.3 mag V-Rc V-Rc colour index (1) 50- 54 F5.3 mag e_V-Rc rms uncertainty on V-Rc (2) 57- 61 F5.3 mag V-Ic V-Ic colour index (1) 63- 67 F5.3 mag e_V-Ic rms uncertainty on V-Ic (2)
Note (1): The magnitudes presented are the mean values over the epochs listed in table1.dat. Note (2): The photometric errors were calculated in the same way as for the standards in table2.dat.
History: From electronic version of the journal
(End) Francois Ochsenbein [CDS] 26-Aug-2003
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

catalogue service

© UDS/CNRS

Contact