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J/A+A/300/323       NOT GL survey of multiply imaged quasars    (Jaunsen+, 1995)

The NOT gravitational lens survey for multiply imaged quasars JAUNSEN A.O., JABLONSKI M., PETTERSEN B.R., STABELL R. <Astron. Astrophys. 300, 323 (1995)> =1995A&A...300..323J (SIMBAD/NED BibCode)
ADC_Keywords: QSOs; Gravitational lensing; Photometry; Colors; Spectroscopy; Redshifts Keywords: cosmology: gravitational lensing - large-scale structure of the Universe - dark matter - quasars: general Description: A gravitational lens (GL)-search program, initiated in 1990 at the Nordic Optcal Telescope (NOT), has revealed several possible GL-candidates among a sample of 168 quasars (QSOs), chosen from three lists compiled by C. Hazard, D. Reimers and J. Surdej, respectively. Some of these candidates, selected for having close companions (within 5 arcseconds), were imaged in several filters and their colours compared. Low dispersion spectra of the most promising candidates were also obtained at the NOT and ESO New Technology Telescope (NTT). None of these has proved to be strong candidates of gravitational lensing effects. We present this new sample of QSOs and combine it with previously published optical QSO samples in a statistical analysis to yield constraints on flat cosmologies and galaxy velocity dispersions. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1 77 168 The complete observational list of the 168 QSOs in the NOT sample
Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 13 A13 --- QSO QSO identification, where the first letter(s) indicates the origin: H: from Hazard, HS: from Reimers (Hamburg Sternwarte) others from the Veron catalogue 16- 17 I2 h RAh Right ascension 1950 18- 19 I2 min RAm Right ascension 1950 20- 24 F5.2 s RAs Right ascension 1950 26 A1 --- DE- Declination sign 27- 28 I2 deg DEd Declination 1950 29- 30 I2 arcmin DEm Declination 1950 31- 34 F4.1 arcsec DEs Declination 1950 37 A1 --- Filter [IRV] Filter types 41- 44 F4.2 arcsec FWHM Seeing (FWHM) 47- 51 F5.3 --- z Redshift z of the QSO 54- 58 F5.2 mag Vmag V-band magnitude of the QSO as estimated from our data or tabulated in other QSO catalogues. The QSOs with no previously measured magnitude were estimated by comparing them to QSOs on other CCD frames (for a similar exposure time) These estimated magnitudes are marked by an asterisk (*) and have errors up to ± 0.5 mag 60- 64 F5.2 mag Dmag []? Magnitude difference between closest companion with weaker apparent brightness and within 5 arcsec of QSO 66- 69 F4.1 arcsec Sep []? Separation of closest companion with weaker apparent brightness and within 5 arcsec of QSO 72 I1 --- GLc See Note (1) 76- 77 A2 --- Note See Note (2)
Note (1): 1 indicates that the QSO is treated as a possible GL candidate while 2 indicates that the object is elongated, diffuse or otherwise especially interesting. The latter objects are not treated as GL candidates in the present analysis, but should be further analysed in future work. Note (2): 1 indicates that there are one or more PSFs and the QSO is not elongated 2 indicates that the QSO appears elongated (this is sometimes due 3 indicates that there are no PSFs other than the QSO in the image to bad tracking)

(End) Patricia Bauer [CDS] 17-Feb-1995
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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