{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:YOM65HG4R75OFFDZTBCDVUFYOJ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5f5cafca10695198217a60d17551d1701adae7593363940de596eb37a68ed92a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-28T23:10:14Z","title_canon_sha256":"32188330d92339840da8acc61600b88c6e89187ae868f81465e7f91f669873fe"},"schema_version":"1.0","source":{"id":"1508.07373","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.07373","created_at":"2026-05-18T01:30:22Z"},{"alias_kind":"arxiv_version","alias_value":"1508.07373v1","created_at":"2026-05-18T01:30:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.07373","created_at":"2026-05-18T01:30:22Z"},{"alias_kind":"pith_short_12","alias_value":"YOM65HG4R75O","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"YOM65HG4R75OFFDZ","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"YOM65HG4","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:92c8f8a5f3fa8d8ba2b95d1b692825beae232893220ff012f4352740070696fc","target":"graph","created_at":"2026-05-18T01:30:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We report on the properties of the most massive ultra-compact dwarf galaxy (UCD) in the nearby Virgo Cluster of galaxies using imaging from the Next Generation Virgo Cluster Survey (NGVS) and spectroscopy from Keck/DEIMOS. This object (M59-UCD3) appears to be associated with the massive Virgo galaxy M59 (NGC 4621), has an integrated velocity dispersion of 78 km/s, a dynamical mass of $3.7\\times10^8 M_\\odot$, and an effective radius ($R_e$) of 25 pc. With an effective surface mass density of $9.4\\times10^{10} M_\\odot/kpc^2$, it is the densest galaxy in the local Universe discovered to date, sur","authors_text":"10, (10) PUC, 11, (11) FONDECYT, 12, (12) CAS-CONICYT, 13), (13) CASSACA, (14) NAOC, (15) CEA/IRFU/SAp, (16) SHAO), 2), (2) Shanghai Key Lab for PPC, (3) corresponding author, 4, (4) PKU, 5), (5) KIAA, (6) UCO/Lick, 7), (7) Texas Tech, (8) CWRU, (9) NRC-HIA, Chengze Liu (1, Elisa Toloba (6, Emily C. Cunningham (6), Eric W. Peng (3, Gregory Herczeg (5), Hong-Xin Zhang (14, J. Christopher Mihos (8), Jean-Charles Cuillandre (15), Joel Roediger (9), Jun Yin (16) ((1) SJTU, Karla Alamo-Mart\\'inez (10, Laura Ferrarese (9), Patrick C\\^ot\\'e (9), Puragra Guhathakurta (6), Rub\\'en S\\'anchez-Janssen (9), Stephen Gwyn (9), Sungsoon Lim (4, Thomas H. Puzia (10)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-28T23:10:14Z","title":"The Most Massive Ultra-Compact Dwarf Galaxy in the Virgo Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.07373","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:c398baca185290fca4faecc224fe55d2832e5b057eee93d7a3dcafb3feb41bdd","target":"record","created_at":"2026-05-18T01:30:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5f5cafca10695198217a60d17551d1701adae7593363940de596eb37a68ed92a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-28T23:10:14Z","title_canon_sha256":"32188330d92339840da8acc61600b88c6e89187ae868f81465e7f91f669873fe"},"schema_version":"1.0","source":{"id":"1508.07373","kind":"arxiv","version":1}},"canonical_sha256":"c399ee9cdc8ffae2947998443ad0b872492f79cd5e86c6435607d0f214b96ea1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c399ee9cdc8ffae2947998443ad0b872492f79cd5e86c6435607d0f214b96ea1","first_computed_at":"2026-05-18T01:30:22.973428Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:22.973428Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c2PPLL7yPVeq9eJd+D7owB5EowTSKmlRr24yNKLHr/qJvTI3NeiEQnw0Q+y4YLZ++xeqEf9HGhaGFplYfor4Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:22.974248Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.07373","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c398baca185290fca4faecc224fe55d2832e5b057eee93d7a3dcafb3feb41bdd","sha256:92c8f8a5f3fa8d8ba2b95d1b692825beae232893220ff012f4352740070696fc"],"state_sha256":"9da87138db80734abdc28428d24f16b348348f44771e2aad5441d16b83abdb06"}