<?xml version='1.0'?><?xml-stylesheet href='/static/xsl/oai.xsl' type='text/xsl'?><ri:Resource created="2015-12-01T11:00:00Z" status="active" updated="2024-12-27T08:31:13Z" version="1.2" xmlns:g-colstat="http://dc.g-vo.org/ColStats-1" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://dc.g-vo.org/ColStats-1 http://vo.ari.uni-heidelberg.de/docs/schemata/Colstats.xsd http://www.ivoa.net/xml/RegistryInterface/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/RegistryInterface.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>Scans of the Palomar-Leiden Trojan Survey Plates</title><shortName>plts plates</shortName><identifier>ivo://org.gavo.dc/plts/q/web</identifier><altIdentifier>doi:10.21938/8jkMIdbl9xGrJn6_GDTzWA</altIdentifier><curation><publisher>The GAVO DC team</publisher><creator><name>van Houten-Groeneveld, I.</name></creator><creator><name>van Houten, C.J.</name></creator><creator><name>Wisse-Schouten, M.</name></creator><creator><name>Bardwell, C.</name></creator><creator><name>Gehrels, T.</name></creator><date role="Updated">2026-01-16T10:24:30Z</date><date role="ExportRequested">2023-11-08</date><contact><name>GAVO Data Centre Team</name><address>Mönchhofstrasse 12-14, D-69120 Heidelberg</address><email>gavo@ari.uni-heidelberg.de</email><telephone>+49 6221 54 1837</telephone></contact></curation><content><subject>jupiter-trojans</subject><subject>trojan-asteroids</subject><subject>wide-field-telescopes</subject><subject>orbit-determination</subject><description>
This service publishes plate scans of the Palomar-Leiden Troian
surveys conducted between 1960 and 1977.  The surveys led to the
discovery of more than 2,000 asteroids (1,800 with orbital information),
with another 2,400 asteroids, including 19 Trojans, found after further
analysis of the plates.

Note that because of the large size of the plates, in this service each
original plate is contained in two parts, marked with "_1" and "_2",
respectively.  The central parts
of the two parts overlap.</description><source format="bibcode">1989A&amp;A...224..299V</source><referenceURL>http://dc.g-vo.org/plts/q/web/info</referenceURL><type>Survey</type><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>ivo://org.gavo.dc/hppunion/q/im</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://org.gavo.dc/__system__/obscore/obscore">GAVO Data Center Obscore</relatedResource><relatedResource ivo-id="ivo://org.gavo.dc/tap">GAVO Data Center TAP service</relatedResource><relatedResource ivo-id="ivo://org.gavo.dc/hppunion/q/im">Historical Photographic Plate Image Archive</relatedResource></relationship></content><rights> Based on photographic plates obtained with the Samuel Oschin
telescope at Palomar Observatory.

Digitization project by the Astronomisches Rechen-Institut (ARI/ZAH),
Heidelberg in collaboration with the Institut fuer Erdmessung (IFE),
Hannover and funded by the Klaus Tschira Foundation gGmbH.</rights><facility>Palomar Observatory</facility><instrument>122-cm Schmidt telescope</instrument><coverage><spatial>2/70,102
3/10,80-82,96-97,160,162,270-271,275,284,286-287,293,304-305,307-310,397,399,403,432,434-435,439,441,443-444,446,700-701,703
4/32,34-35,44,46,128-130,279,285,299,302,332-334,336-338,353,392-393,395-398,402,646,652,654,672-673,1071,1075,1077-1079,1091,1094-1095,1097,1099,1112,1114-1115,1140,1142-1143,1168-1169,1171,1180-1181,1224-1225,1244-1245,1253,1264,1567,1593,1595,1609-1611,1626,1648,1684-1685,1687,1693,1732,1734-1735,1751-1752,1754,1761,1763,1771,1781,1788,1790,1952,1954-1955,1960,2783,2808-2809,2811</spatial><temporal>37190 37250</temporal><temporal>38776 38802</temporal><temporal>41022 41107</temporal><temporal>41387 41409</temporal><temporal>41936 41979</temporal><temporal>43416 43454</temporal><spectral>3.00977e-19 6.01953e-19</spectral><footprint ivo-id="ivo://ivoa.net/std/moc">http://dc.g-vo.org/plts/q/web/coverage</footprint><waveband>Optical</waveband></coverage><tableset><schema><name>plts</name><title>Scans of the Palomar-Leiden Trojan Survey Plates</title><description>
This service publishes plate scans of the Palomar-Leiden Troian
surveys conducted between 1960 and 1977.  The surveys led to the
discovery of more than 2,000 asteroids (1,800 with orbital information),
with another 2,400 asteroids, including 19 Trojans, found after further
analysis of the plates.

Note that because of the large size of the plates, in this service each
original plate is contained in two parts, marked with "_1" and "_2",
respectively.  The central parts
of the two parts overlap.</description><table type="output"><name>output</name><description>
This service publishes plate scans of the Palomar-Leiden Troian
surveys conducted between 1960 and 1977.  The surveys led to the
discovery of more than 2,000 asteroids (1,800 with orbital information),
with another 2,400 asteroids, including 19 Trojans, found after further
analysis of the plates.

Note that because of the large size of the plates, in this service each
original plate is contained in two parts, marked with "_1" and "_2",
respectively.  The central parts
of the two parts overlap.</description><column><name>accref</name><description>Access key for the data</description><ucd>meta.ref.url</ucd><utype>Access.Reference</utype><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>accsize</name><description>Size of the data in bytes</description><unit>byte</unit><ucd>VOX:Image_FileSize</ucd><utype>Access.Size</utype><stats><min>627727680</min><percentile03>772384320.0</percentile03><median>772384320.0</median><percentile97>1544757120.0</percentile97><max>1544757120</max><fillFactor>1.0</fillFactor></stats><dataType xsi:type="vs:VOTableType">long</dataType><flag>nullable</flag></column><column><name>imagetitle</name><description>Synthetic name of the image</description><ucd>meta.title</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>centeralpha</name><description>Approximate center of image, RA</description><unit>deg</unit><ucd>pos.eq.ra</ucd><stats><min>0.0594023</min><percentile03>0.464026</percentile03><median>11.5676</median><percentile97>356.407</percentile97><max>359.47</max><fillFactor>1</fillFactor></stats><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>centerdelta</name><description>Approximate center of image, Dec</description><unit>deg</unit><ucd>pos.eq.dec</ucd><stats><min>-11.4021</min><percentile03>-6.01196</percentile03><median>3.33087</median><percentile97>28.1723</percentile97><max>30.9305</max><fillFactor>1</fillFactor></stats><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>dateobs</name><description>Epoch at midpoint of observation</description><unit>d</unit><ucd>VOX:Image_MJDateObs</ucd><stats><min>37201.3</min><percentile03>37201.4</percentile03><median>41043.4</median><percentile97>43437.5</percentile97><max>43438.5</max><fillFactor>1</fillFactor></stats><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>exposure</name><description>Effective exposure time</description><unit>s</unit><ucd>time.duration;obs.exposure</ucd><stats><min>240</min><percentile03>600</percentile03><median>720</median><percentile97>2400</percentile97><max>43200</max><fillFactor>1</fillFactor></stats><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>emulsion</name><description>Emulsion of the original plate</description><ucd>instr.plate.emulsion</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>bandpassid</name><description>Free-form name of the bandpass used</description><ucd>instr.bandpass</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column></table></schema></tableset></ri:Resource>