J/AJ/107/1245ivo://CDS.VizieR/J/AJ/107/1245doi:10.26093/cds/vizier.51071245CDSSchneider D.P.Schmidt M.Gunn J.E.2023-04-06T16:50:06Z1997-12-09T20:16:10ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frquasarsredshiftedThis paper reports the initial results of the Palomar Transit Grism Survey (PTGS). The PTGS was designed to produce a sample of z>2.7 quasars that were identified by well-defined selection criteria. The survey consists of six narrow (~8.5' wide) strips of sky; the total effective area is 61.47deg^2^. Low-resolution slitless spectra, covering the wavelength range from 4400 to 7500A, were obtained for approximately 600000 objects. The wavelength- and flux-calibrated spectra were searched for emission lines with an automatic software algorithm. A total to 1655 emission features in the grism data satisfied our signal-to-noise ratio and equivalent width selection criteria; subsequent slit spectroscopy of the candidates confirmed the existence of 1052 lines (928 different objects). Six groups of emission lines were detected in the survey: Lyman alpha+N V, C IV, C III], Mg II, Hbeta+[O III], and Halpha+[S II]. More than two-thirds of the candidates are low-redshift (z<0.45) emission-line galaxies; ninety objects are high-redshift quasars (z>2.7) detected via their Lyman alpha+N V emission lines. The survey contains three previously unknown quasars brighter than 17th magnitude; all three have redshifts of ~1.3. In this paper we present the observational properties of the survey, the algorithms used to select the emission-line candidates, and the catalog of emission-line objects.1994AJ....107.1245Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/107/1245CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/107/1245https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/107/1245http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/107/1245https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/107/1245https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/107/1245http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/107/1245GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/107/1245/table5 (Transit grism line detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/107/1245/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/107/1245/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/107/1245/table5?GETtext/xml+votable180.050000true0.9003842.5136720.0055555555555555565/1395 1400 1439 1459-1460 1475 1480 2483-2484 2504 2739 2760 2819-2820 4445 4461 4465 4802 6/4-6 9-10 16 5495 5499-5500 5502-5503 5559 5565-5567 5579 5584-5585 5587-5589 5594 5604-5606 5608-5610 5815 5820-5822 5844 5846 5848-5849 5856 5858-5861 5895 5899 5904-5906 5908-5909 5912 5924-5926 5928-5930 6061-6063 6072 6527 6612 6614 6616 6618 7007 7021 7025-7027 7032 7183 7187-7188 7190 7192-7193 7204-7205 7208 7210 7261-7263 7277-7279 7282 7284 7288 7325 7327 7342-7343 7345 7347 7352 7361-7364 7425-7428 7432 7681-7684 9183 9199 9204 9208 9439 9453 9455 9663 9704 9706 9759 9775 9793-9795 9800 9847 9851 9853-9855 9859 9911 9927 9931 9940-9942 9944 9946 9953-9956 9958 9960 9962 9991 9995 9997-9998 10003-10004 10008 10024-10025 10461-10463 10477 10479 10483 10488 10541 10543 10546 10548 10552 10561 10563-10564 10621-10623 10627 10679 10685-10687 10699 10701-10703 10706-10708 10710 10712-10713 10721-10724 10726 10728 10781-10782 10798 10803-10804 10808 10819-10820 10824 10875 10877-10879 10881 10884 10939 10941 10943 10951 10961-10965 10968-10970 10976-10978 10980-10982 10984-10986 11015 11021-11026 11028-11030 11032 11034 11044 11046 11050 11271 11275 11284-11285 11288 11297-11302 11304 11306 12289 12291 12293 12296 12304 17759 17775 17777-17779 17784-17785 17821-17823 17837-17838 17843 17848-17850 17858-17859 17864-17866 17888 18013-18015 18029 18031 18034-18035 18037-18038 18040-18042 18077 18101-18102 18106 18116-18118 18120-18122 18124 18128 18144 18180 18182-18183 18185 18187-18188 18783 18799 18803 18805-18806 18808-18809 18811-18812 18863 18867 18869 18873-18875 18881 18884 18886 18888-18890 18892 19037-19039 19057 19059-19061 19064 19068 19103 19118-19119 19121 19125-19128 19130 19132 19137-19138 19141-19142 19145 19148 19168 19201 19203-19204 19206-19207 19460-19462 19464 19466 19468 19472 22957 22959 22962 23133 23151 23155 23158 23164 23213-23215 23220 23222-23224 23233-23234 23236 23238 23242-23243 23300 23302-23303 28637 28639 28653 28655 28658-28660 28664 30045 30047https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/107/1245?format=asciiOpticaldefaultJ/AJ/107/1245/table5Transit grism line detectionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPTGSName with multiplicity index (1)meta.code.multip;spect.indexcharRA1950Right ascension (1950)pos.eq.ra;meta.mainDE1950Declination (1950)pos.eq.dec;meta.mainr4r_4_ magnitude calculated from the slit spectrummagphot.magfloatzSource redshift based on measurements of the slit spectrumsrc.redshiftfloat-logFNegative logarithm of the detected emission line fluxmW.m**-2phot.flux;spect.linefloatEWObserved equivalent width of the emission feature ID measured in the slit spectrum (2)0.1nmmeta.id;spect.line.eqWidthintSNSignal-to-noise ratio of the emission line in the grism spectrumstat.snr;spect.linefloatW0Intrinsic observed line width measured from the slit spectrum for ID line0.1nmspect.line.widthintIDIdentification code for line (3)meta.codeint_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexed