Damped Ly{alpha} systems from SDSS DR16Q J/ApJS/258/18 ivo://CDS.VizieR/J/ApJS/258/18 doi:10.26093/cds/vizier.22580018 CDS Chabanier S. Etourneau T. Le Goff J.-M. Rich J. Stermer J.,Abolfathi B. Font-Ribera A. Gonzalez-Morales A.X. de la Macorra A.,Perez-Rafols I. Petitjean P. Pieri M.M. Ravoux C. Rossi G.,Schneider D.P. 2023-11-13T07:54:09Z 2022-06-10T13:58:18Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr intergalactic-medium quasars visible-astronomy spectroscopy redshifted We present the characteristics of the damped Ly{alpha} (DLA) systems found in data release DR16 of the extended Baryon Oscillation Spectroscopic Survey of the Sloan Digital Sky Survey. The DLAs were identified using the convolutional neural network of Parks et al. (2018MNRAS.476.1151P). A total of 117458 absorber candidates were found with 2<=z_DLA_<=5.5 and 19.7<=log(N(H_I_)/cm^-2^)<=22, including 57136 DLA candidates with log(N(H_I_)/cm^-2^)>=20.3. Mock quasar spectra were used to estimate the DLA detection efficiency and the purity of the resulting catalog. Restricting the quasar sample to bright forests, i.e., those with mean forest fluxes f_{lambda}_>2x10^-19^W/m^2^/nm, the efficiency and purity are greater than 90% for DLAs with column densities in the range 20.1<=log(N(H_I_)/cm^-2^)<=22. 2022ApJS..258...18C https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/258/18 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020) VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020) J/ApJ/635/123 : The SDSS-DR3 damped Ly{alpha} survey (Prochaska+, 2005) J/A+A/505/1087 : DLAs in SDSS-DR7 (Noterdaeme+, 2009) J/A+A/547/L1 : SDSS-III DR9 DLA catalogue (Noterdaeme+, 2012) J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012) J/ApJ/775/78 : Lyman limit abs. systems in z~3 QSOs (Fumagalli+, 2013) J/A+A/559/A85 : 1D Lya forest power spectrum (Palanque-Delabrouille+, 2013) J/MNRAS/472/1850 : Detecting damped Ly{alpha} absorbers (Garnett+, 2017) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/258/18 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/258/18 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/258/18 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/258/18 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/258/18 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/258/18 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJS/258/18/dr16dla (The DR16 damped Ly{alpha} (DLA) catalog) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/258/18/dr16dla? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/258/18/dr16dla? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/258/18/dr16dla? GET text/xml+votable 180.0 50000 true 38.7338699 -5.8647737 0.005555555555555556 1/10 2/19 22-23 25 77 107 109-111 3/32 34 65-67 70-73 75 80-81 83 85-87 97 112-114 130-131 134-135 137-139 142-143 146-147 150 153-155 176-178 184 208 276-278 281 283-284 286-287 300-301 303-306 313 315-318 413 415 432-434 4/40 42-43 46 132 134 140 160 257-259 272-274 276 278-279 296 299 328-329 331 337-339 385 397 460-461 465-468 472 512 515-517 529-534 544-545 547 560-562 564 566-567 576-577 579 581-583 592 594-595 609-611 624 626 632 634 716 718 720 740 744-746 788-789 791 797 836-838 840-841 848 1084-1085 1087 1095 1101-1103 1116 1118 1121-1123 1128-1130 1140 1142-1143 1173-1175 1177-1178 1180-1181 1183 1189-1190 1193 1195-1196 1198-1199 1208 1210 1228-1229 1231 1250-1251 1256-1257 1259 1276 1367 1373 1397 1621 1623 1625-1627 1630-1631 1638-1639 1641 1643-1645 1647-1649 1651 1656-1658 1685-1686 1689-1691 1693-1695 1702 1706-1709 1711 1741-1742 1961-1963 1965-1967 1979 1982-1983 2026-2027 2030 2299 2302 5/2 8 10 138 164 166-167 190 532-533 535 540-542 568 576 644 648 650 1024-1026 1100-1102 1109-1111 1188-1190 1192-1193 1195 1320-1321 1323 1344 1346-1347 1537 1548-1549 1585 1596-1597 1599 1685 1729 1848-1850 1852-1854 1857-1859 1876-1878 1880-1881 1896 2053-2055 2057-2059 2072-2073 2075-2077 2079 2112 2114-2115 2140-2141 2143 2184-2186 2252-2253 2255 2261-2263 2312 2314-2315 2321-2322 2372 2374-2375 2432-2433 2435 2500 2502 2508 2510 2532 2534 2540 2868 2870 2876 2878 2888-2890 2968 2970 2988 3077 3079 3088-3090 3092-3094 3096 3141 3160-3161 3163 3185 3196-3197 3199 3356-3358 3368-3369 3376-3377 3396 3400 4309 4313-4315 4318-4319 4325 4345 4374-4375 4377 4397-4399 4401-4403 4468 4470 4476 4478 4481-4483 4524-4526 4669-4671 4685-4687 4690-4691 4705-4707 4716-4717 4728 4730-4731 4749-4751 4753 4755 4764-4765 4767 4769-4771 4776-4777 4779 4788-4789 4791 4837-4839 4844 4846-4847 4920 4922 4992 4994-4996 4998-4999 5032-5034 5109-5110 5112-5113 5461 5463 5465-5467 5477 5488-5489 5491 5499-5502 5596-5597 5599 5621 5623 5798 5802 6398-6399 6461-6463 6477-6479 6481-6483 6489-6490 6497-6499 6512 6514-6515 6517-6519 6541-6543 6545-6546 6548 6550-6551 6561 6563 6568 6570-6571 6584 6586-6587 6600-6601 6603 6636-6637 6639 6717-6719 6733-6735 6739 6748-6749 6751 6754-6755 6768 6771 6797 6799 6802-6806 6812 6814-6815 6817 6821-6823 6840-6842 6960-6962 6972 6974-6975 7509 7839 7843 7858-7859 7882 7905-7908 7910 7912-7914 7921-7924 7926-7927 8098-8099 8102-8103 8114 8118-8119 8125-8127 8170-8171 8174 9191 9195 9202 9214 11261 6/0 2-3 12 14 22-23 36 38 128 521 523 544 546-547 556 558-559 662-663 714-716 727 754 764 766 902 907 938 972 975 2023 2137-2139 2172-2174 2256-2258 2264 2276 2278 2280-2282 2297 2300 2312 2314 2580-2582 2584-2586 2596-2598 2604 2608 2688 4108 4110-4111 4413-4415 4433-4435 4764-4765 4767 4776-4777 5288-5289 5291 5380-5381 5383 6147 6157 6159 6183 6200-6201 6204-6205 6295 6303 6337-6339 6345 6348-6349 6351 6372-6373 6393-6395 6708 6710 6736-6737 6739 6912-6914 6928-6930 6932-6933 6935 6976-6977 6980-6981 6992-6993 6996-6997 7163 7404-7406 7420-7422 7425-7427 7516-7518 7528-7530 7532 7536-7538 7568-7570 7572 7588 7590 7592-7593 7597 7600 7604 7606 7680-7681 7684-7685 7696-7697 8208-8209 8211 8224-8225 8227 8296 8298-8299 8312 8314-8315 8452-8453 8455 8568-8570 8748 8750-8751 9016 9018-9019 9040 9042-9043 9252-9253 9281-9283 9292-9293 9295 9492 9494-9495 9568 9576 9578 9664 9666 9672 9737-9739 10004-10006 10012 10014 10036 10038 10044 10046 10067 10072 10087 10092 10104 10168-10170 10177 10180 10182 10189 10192-10193 10213-10214 10217 10219 10226 11476-11478 11484 11486 11536 11538 11544 11546 11551 11564-11566 11572 11588 11599 11648-11650 11652 11856 11858 11876-11878 11884 11886 11956 11960 11968-11969 12293 12304-12305 12307 12313 12315 12341 12343 12364-12366 12380 12388 12392 12396 12408 12544-12546 12548-12549 12552 12560-12561 12563 12573 12575 12597 12599 12648-12649 12651 12749 12751 12773 12793 13437 13480-13481 13484 13488-13489 13492 13512-13514 13520-13521 13588-13590 13592-13593 13604 13657-13658 13767 14997 15918 17150 17211 17213-17215 17229 17245-17249 17251 17265-17268 17270-17271 17294-17295 17297 17299 17306 17309 17311 17317 17320-17321 17324 17333 17377 17389 17391 17471 17487 17493-17495 17512-17513 17517-17519 17556 17565-17567 17570 17578-17579 17581-17583 17585-17587 17601-17603 17876-17878 17908 17910 17916 17921-17923 18108-18110 18256 18258 18264 18266-18267 18270-18271 18516 18521-18522 18524 18535 18537 18541 18545 18580 18582 18586 18588-18589 18604 18607 18610-18611 18624 18632 18654-18655 18669 18671 18673-18675 18689 18717-18719 18734-18735 18738-18739 18753-18755 18757-18759 18817 18819 18872-18874 18876 18878-18879 18916-18918 18949 18956 18975 18989-18991 18993-18995 19009-19011 19016 19018-19019 19065-19067 19073-19075 19113-19114 19160-19162 19345-19347 19380-19381 19383 19684-19686 19692 19694-19695 19972 19974-19975 19988 19990-19991 20140 20142-20143 20432-20433 20435 20444 20456-20458 20460-20461 20464 20473-20474 21823 21839-21841 21843 21849-21851 21859 21907 21913 21915-21918 21940 21961 21963 21988-21989 21991 21995 22012-22013 22015 22340-22341 22343 22373 22393 22462 22517 22519 22525 22654 22743 22892 23046 23049 23052-23054 23057-23059 23065 23072 23076 23103 23144-23146 23183 23185-23188 23190-23191 23196-23197 23201-23206 23213 23216-23217 23232 23234 23354 23405 23429 23534 25247 25316 25530 25565 25567 25583 25587 25771 25821-25823 25837-25839 25841-25843 25887 25902-25903 25905 25907 25923 25953-25955 25964-25966 25986-25987 26052-26054 26064-26065 26067 26112 26141 26143 26157 26159 26161 26179 26188-26189 26191 26197-26199 26249-26251 26276-26278 26340-26341 26343 26408 26410-26411 26553-26555 26863 26867 26909 26911 26927 26931 26947 26949-26951 26953-26955 27000-27002 27011-27012 27014-27015 27076-27078 27080 27082-27083 27167 27183 27187 27193-27195 27203-27204 27206-27207 27228-27229 27254 27273-27274 27276-27278 27280-27282 27372-27374 27852 27854-27855 27892-27894 30033 30035 30043-30044 31289-31290 31292 31294-31295 31316 31320 31326 31331 31342 31351 31354-31355 31366-31367 31370-31371 31424 31426-31427 31429-31431 31522 31534-31535 31546-31547 31550-31551 31598-31599 31614 31617-31619 31636 31644 31646-31647 31660-31662 31681 31683 31700 31702-31703 32386 32390-32391 32403 32460 32462-32463 32497-32499 32642 32649-32651 32672-32674 32678-32679 32690 32702 36725 36727 36759 36761 36763 36773-36775 36777-36779 36800 36802-36803 36812 36814-36815 36848 36850-36851 36860 36862-36863 40949-40951 40958-40959 45039 45049-45051 45053-45055 49018-49019 49086 49100-49101 49103 49105 49117 49119 49121 49128 49151 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/258/18?format=ascii Optical default J/ApJS/258/18/dr16dla The DR16 damped Ly{alpha} (DLA) catalog SimbadName Simbad column added by the CDS meta.id char nullable recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int ID [7095815/554679218]? The SDSS identifier as found in DR16Q, Cat. VII/289 (THING_ID) meta.id;meta.main long nullable zQSO [2/5.6] Quasar redshift of the sight line using the Z_PCA estimator of DR16Q (Z_QSO) (1) src.redshift;pos.heliocentric double zCNN [2/5.4] Absorber redshift as found by the convolutional neural networks (CNN; Parks+ 2018MNRAS.476.1151P) (Z_CNN) src.redshift;pos.heliocentric double Conf [0.1/1] Confidence parameter of the CNN (>0.5=highly confident absorbers) (CONF_CNN) meta.code.qual float NHIcnn [19.7/22.3] Logarithm of the absorber column density as found by the CNN (NHI_CNN) log(cm**-2) phys.columnDensity float Flux [-0.99/73.6]? Mean forest flux in 10^-19^W/m^2^/nm units (MEAN_FLUX) (2) 1e-19W.m**-2.nm**-1 phot.flux double nullable SNR [-1.3/41] Mean signal-to-noise ratio of the sight line stat.snr;stat.mean float Plate [269/11704] SDSS spectroscopic plate of the sight line as found in DR16Q pos.parallax.spect;instr.plate int MJD [51612/58543] SDSS modified Julian date of observation of the sight line as found in DR16Q d time.epoch int indexed Fiber [1/1000] SDSS spectroscopic fiber identification of the sight line as found in DR16Q (FIBERID) meta.id.assoc;pos.parallax.spect;spect.line int RAJ2000 Right ascension (J2000) of the sight line as found in DR16Q (RA) deg pos.eq.ra;meta.main indexed DEJ2000 [-17.6/70] Declination (J2000) of the sight line as found in DR16Q (DEC) deg pos.eq.dec;meta.main indexed NHIfit [19.29/22.4]? Logarithm of the absorber column density as found by the Voigt profile fitter for absorbers in the rest-frame range 1040{AA}<={lambda}_RF_<1216{AA} (NHI_FIT) log(cm**-2) phys.columnDensity float nullable Sp Interactive spectrum from SDSS-DR16 meta.ref.url char NED NED column added by the CDS meta.ref.url char