Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:
 Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
J/AJ/162/72
  Random forests method to discover high-redshift QSOs (Wenzl+, 2021)
ReadMe+ftp
2021AJ....162...72W
Similar Catalogs
[METAcat] [METAcells] [stats]
Post annotation 		img(gal)
1.J/AJ/162/72/table7(c)List of quasar candidates that are part of the high-z candidates selection and information about their observation status (515 rows) (released 2022-03-14)
[METAtab] [METAcola]
2.J/AJ/162/72/table9(c)List of newly discovered quasars in this work (20 rows) (released 2022-03-14)
[METAtab] [METAcola]
Help Xmatch is

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  (1)Index   [0/514] Sequential running index (meta.code)
   (ALL)WISE (char) Name in ALLWISE catalog (meta.id;meta.main)
   (ALL)RAJ2000 deg (i) [0/360] Pan-STARRS Right Ascension, (J2000) (pos.eq.ra;meta.main)
   (ALL)DEJ2000 deg (i) [-30/86] Pan-STARRS Declination (J2000) (pos.eq.dec;meta.main)
  (1)zPSF mag [18.3/20.5] z stacked PSF mag in Pan-STARRS (meta.code)
  (1)Pz   [0.4/1] Probability for high-z class (meta.code;stat.probability)
  (1)PQSO   [0.4/1] Summed probability for quasar classes (meta.code;stat.probability)
  (1)PMstar (char) Probability for M star class (meta.code;stat.probability)
  (1)zPredicted   [4.8/6.2] High redshift regression result (meta.code)
  (1)zspec  (n) [4.7/6.3] Redshift determined from spectrum (meta.code)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)Known?  Boolean whether quasar is known in literature (meta.code)
  (1)Photo?  Boolean whether we obtained photometric follow-up (meta.code;stat.probability)
  (1)Obs?  Boolean whether we took a spectrum of the object (meta.code)
  (1)Still?  Boolean whether object still has to be observed (meta.code)
  (2)zMag mag [17.8/20.4] z stacked PSF magnitude in Pan-STARRS, extinction corrected (phot.mag)
  (2)M1450 mag [-28.3/-25.7] M1450 based on PS photometry (phot.mag)
  (2)Inst (char) Telescope and Instrument used for observation (instr.setup)
  (2)Obs "Y:M:D" [18/21] Observation year (time.epoch)
  (2)z   [4.6/5.8] Observed Spectroscopic redshift (src.redshift)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
Adapt form
 Display your selection only Reset to default columns
usage  Display UCD1+    UCD1  
.errorfile=/tmp/V-3.err (2025-04-05T04:15:10)
-3
-source=J/AJ/162/72
-ref=VIZ67f0ae4e3d4ece
elapse time 0

Options: wopt=0, optS=0, onote=0, opt1=8, opos=0

Contents of error file (/tmp/V-3.err):
CDSportal=http://cdsportal.u-strasbg.fr/StoreVizierData.html
COCAT=130.79.128.31
COCATPORT=1801
CONTEXT_DOCUMENT_ROOT=/srv/httpd/local/cgi/
CONTEXT_PREFIX=/local/viz-bin/
Content=text/html
DOCKER=yes
DOCUMENT_ROOT=/srv/httpd/Pages/
GATEWAY_INTERFACE=CGI/1.1
GLUDIR=/srv/glu
GLUHOME=/srv/glu
GROUP=root
HOME=/srv/httpd
HOST=5cb18c391f9b
HOSTTYPE=x86_64-linux
HTTP_ACCEPT=*/*
HTTP_ACCEPT_ENCODING=gzip, br, zstd, deflate
HTTP_CONNECTION=Keep-Alive
HTTP_HOST=cds:8082
HTTP_USER_AGENT=Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
HTTP_X_FORWARDED_FOR=18.221.113.108
HTTP_X_FORWARDED_HOST=viz-beta.u-strasbg.fr
HTTP_X_FORWARDED_SERVER=viz-beta.u-strasbg.fr
LC_ALL=C
LD_LIBRARY_PATH=/srv/httpd/../lib:/srv/lib:/usr/local/lib:/usr/lib
LOGNAME=root
MACHTYPE=x86_64
METADB=metaviz@VIZIR asu asu4VizieR
MOCCMD=mocset query /srv/httpd/mocs/mocset10.bin cone -p 5 
NEWS=/VizieR/+news.htx
OSTYPE=linux
PATH=/srv/httpd/bin:/usr/local/bin:/usr/bin:/bin
PATH_INFO=/
PWD=/srv/httpd/cgi
QMOCCMD=.ext-tsv/qat2s_asu --out.form tsv --noheader --out.max=999999999 --source=%s --moc=%s --out='!/_((RA)|(DE))J2000|recno/'
QUERY_STRING=-source=J%2FApJ%2F896%2F1
REMOTE_ADDR=130.79.128.30
REMOTE_PORT=39404
REQUEST_METHOD=GET
REQUEST_SCHEME=http
REQUEST_URI=/local/viz-bin/VizieR-3?-source=J%2FApJ%2F896%2F1
SCRIPT_FILENAME=/srv/httpd/local/cgi/VizieR-3
SCRIPT_NAME=/local/viz-bin/VizieR-3
SERVER_ADDR=172.17.0.2
SERVER_ADMIN=gilles.landais@astro.u-strasbg.fr
SERVER_NAME=cds
SERVER_PORT=8082
SERVER_PROTOCOL=HTTP/1.1
SERVER_SIGNATURE=
SERVER_SOFTWARE=Apache/2.4.57 (Unix)
SESAME_SERVER=glu
SHLVL=1
USER=root
VENDOR=unknown
VSEARCH_HOST=cdsarc.cds.unistra.fr
VSEARCH_REDIRECT=http://cdsarc.cds.unistra.fr
Vaccess=*
Vprog=/srv/httpd/bin/vizier
Vprog_ls=-rwxr-xr-x 1 root root 963656 Mar 12 13:03 /srv/httpd/bin/vizier
Vroot=/srv/httpd

################################################################
....(in): -source=J/ApJ/896/1
################################################################

....Trying '/srv/httpd/interfaces' => OK
....Trying '/srv/httpd/interfaces' => 3
....db1_interfaces(/srv/httpd/interfaces)
----db1_query(0 'metaviz@VIZIR'):
[1743826510]   Select ucdid, name, class, explain From METAucd where ucdid=321
----db1_reset(0 'metaviz@VIZIR')
----opt1= 8
----inherit(u=used, h=hidden):
     [u] +source=J/AJ/162/72
     [u] -ref=VIZ67f0ae4e3d4ece
====inherit(): added 0 hidden fields
----free temporary files
----db1_close(0 'metaviz@VIZIR')
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→ Rules of usage of VizieR data

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