{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:TT4S6VO32IFVHZUDWZ25JIN325","short_pith_number":"pith:TT4S6VO3","canonical_record":{"source":{"id":"1510.03856","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-13T20:12:17Z","cross_cats_sorted":[],"title_canon_sha256":"90fcdfbc7aabec9d3f438b80b9d97216b9101a22f092483cdfefcd8daa2a2086","abstract_canon_sha256":"3e8c9de25816acd6c1a18647042a0b8d9c7d8ab443ac7ff176dc68cc542a7f33"},"schema_version":"1.0"},"canonical_sha256":"9cf92f55dbd20b53e683b675d4a1bbd777f00922bcb80d79459833d39647c3c8","source":{"kind":"arxiv","id":"1510.03856","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.03856","created_at":"2026-05-18T01:26:50Z"},{"alias_kind":"arxiv_version","alias_value":"1510.03856v3","created_at":"2026-05-18T01:26:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.03856","created_at":"2026-05-18T01:26:50Z"},{"alias_kind":"pith_short_12","alias_value":"TT4S6VO32IFV","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TT4S6VO32IFVHZUD","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TT4S6VO3","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:TT4S6VO32IFVHZUDWZ25JIN325","target":"record","payload":{"canonical_record":{"source":{"id":"1510.03856","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-13T20:12:17Z","cross_cats_sorted":[],"title_canon_sha256":"90fcdfbc7aabec9d3f438b80b9d97216b9101a22f092483cdfefcd8daa2a2086","abstract_canon_sha256":"3e8c9de25816acd6c1a18647042a0b8d9c7d8ab443ac7ff176dc68cc542a7f33"},"schema_version":"1.0"},"canonical_sha256":"9cf92f55dbd20b53e683b675d4a1bbd777f00922bcb80d79459833d39647c3c8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:50.080192Z","signature_b64":"sntsQZMXfrqGCgiVdGLTWCVMIn1qD4sAQeKBvVXvbpb0i7aIAeFoVbDdSSMsFhi1xsyhAAoEPz2bhSIWy2YzAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9cf92f55dbd20b53e683b675d4a1bbd777f00922bcb80d79459833d39647c3c8","last_reissued_at":"2026-05-18T01:26:50.079533Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:50.079533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.03856","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:26:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fWOqgGaLStCz/U3uIZsdtWBXQICsvaW+4qgPWxdi83QkVrijvcoIm04Y1FpN5fbJ3cMiMrg837ia0hkRoIM0Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T01:42:59.194329Z"},"content_sha256":"ce23f45627e3b098beefd898aaf082c1081ed9585e6ec268127bc2a9c160ad34","schema_version":"1.0","event_id":"sha256:ce23f45627e3b098beefd898aaf082c1081ed9585e6ec268127bc2a9c160ad34"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:TT4S6VO32IFVHZUDWZ25JIN325","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Triangulum II: Possibly a Very Dense Ultra-Faint Dwarf Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Carnegie Observatories, (3) UC Santa Cruz), Evan N. Kirby (1), Joshua D. Simon (2), Judith G. Cohen (1), Puragra Guhathakurta (3) ((1) Caltech","submitted_at":"2015-10-13T20:12:17Z","abstract_excerpt":"Laevens et al. recently discovered Triangulum II, a satellite of the Milky Way. Its Galactocentric distance is 36 kpc, and its luminosity is only 450 L_sun. Using Keck/DEIMOS, we measured the radial velocities of six member stars within 1.2' of the center of Triangulum II, and we found a velocity dispersion of sigma_v = 5.1 -1.4 +4.0 km/s. We also measured the metallicities of three stars and found a range of 0.8 dex in [Fe/H]. The velocity and metallicity dispersions identify Triangulum II as a dark matter-dominated galaxy. The galaxy is moving very quickly toward the Galactic center (v_GSR ="},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.03856","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:26:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IUO6VycFzzIsL74f2ttL9S+Ca2ni7lHa5+pttCaeHVNTzUoZYZP24mzozwdqf/e3XyskbEikuVBJBxeuZklABA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T01:42:59.194970Z"},"content_sha256":"a48b7aa06f04b65dffa6df5cd7c679424dca743bc0f376af00ac045c8b574506","schema_version":"1.0","event_id":"sha256:a48b7aa06f04b65dffa6df5cd7c679424dca743bc0f376af00ac045c8b574506"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TT4S6VO32IFVHZUDWZ25JIN325/bundle.json","state_url":"https://pith.science/pith/TT4S6VO32IFVHZUDWZ25JIN325/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TT4S6VO32IFVHZUDWZ25JIN325/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-05T01:42:59Z","links":{"resolver":"https://pith.science/pith/TT4S6VO32IFVHZUDWZ25JIN325","bundle":"https://pith.science/pith/TT4S6VO32IFVHZUDWZ25JIN325/bundle.json","state":"https://pith.science/pith/TT4S6VO32IFVHZUDWZ25JIN325/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TT4S6VO32IFVHZUDWZ25JIN325/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TT4S6VO32IFVHZUDWZ25JIN325","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":"3e8c9de25816acd6c1a18647042a0b8d9c7d8ab443ac7ff176dc68cc542a7f33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-13T20:12:17Z","title_canon_sha256":"90fcdfbc7aabec9d3f438b80b9d97216b9101a22f092483cdfefcd8daa2a2086"},"schema_version":"1.0","source":{"id":"1510.03856","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.03856","created_at":"2026-05-18T01:26:50Z"},{"alias_kind":"arxiv_version","alias_value":"1510.03856v3","created_at":"2026-05-18T01:26:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.03856","created_at":"2026-05-18T01:26:50Z"},{"alias_kind":"pith_short_12","alias_value":"TT4S6VO32IFV","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TT4S6VO32IFVHZUD","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TT4S6VO3","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:a48b7aa06f04b65dffa6df5cd7c679424dca743bc0f376af00ac045c8b574506","target":"graph","created_at":"2026-05-18T01:26:50Z","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":"Laevens et al. recently discovered Triangulum II, a satellite of the Milky Way. Its Galactocentric distance is 36 kpc, and its luminosity is only 450 L_sun. Using Keck/DEIMOS, we measured the radial velocities of six member stars within 1.2' of the center of Triangulum II, and we found a velocity dispersion of sigma_v = 5.1 -1.4 +4.0 km/s. We also measured the metallicities of three stars and found a range of 0.8 dex in [Fe/H]. The velocity and metallicity dispersions identify Triangulum II as a dark matter-dominated galaxy. The galaxy is moving very quickly toward the Galactic center (v_GSR =","authors_text":"(2) Carnegie Observatories, (3) UC Santa Cruz), Evan N. Kirby (1), Joshua D. Simon (2), Judith G. Cohen (1), Puragra Guhathakurta (3) ((1) Caltech","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-13T20:12:17Z","title":"Triangulum II: Possibly a Very Dense Ultra-Faint Dwarf Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.03856","kind":"arxiv","version":3},"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:ce23f45627e3b098beefd898aaf082c1081ed9585e6ec268127bc2a9c160ad34","target":"record","created_at":"2026-05-18T01:26:50Z","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":"3e8c9de25816acd6c1a18647042a0b8d9c7d8ab443ac7ff176dc68cc542a7f33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-13T20:12:17Z","title_canon_sha256":"90fcdfbc7aabec9d3f438b80b9d97216b9101a22f092483cdfefcd8daa2a2086"},"schema_version":"1.0","source":{"id":"1510.03856","kind":"arxiv","version":3}},"canonical_sha256":"9cf92f55dbd20b53e683b675d4a1bbd777f00922bcb80d79459833d39647c3c8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9cf92f55dbd20b53e683b675d4a1bbd777f00922bcb80d79459833d39647c3c8","first_computed_at":"2026-05-18T01:26:50.079533Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:50.079533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sntsQZMXfrqGCgiVdGLTWCVMIn1qD4sAQeKBvVXvbpb0i7aIAeFoVbDdSSMsFhi1xsyhAAoEPz2bhSIWy2YzAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:50.080192Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.03856","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce23f45627e3b098beefd898aaf082c1081ed9585e6ec268127bc2a9c160ad34","sha256:a48b7aa06f04b65dffa6df5cd7c679424dca743bc0f376af00ac045c8b574506"],"state_sha256":"b108374971cb617e626f30cfe12a0fa52fa6158d8ce9959e5aab123ecf11859f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"19YLIN4AvoutFdNgQAyIQrnlCPZq5jKc/6NWQ/fnZoug/Qtg7tNMMDUP2WXob2bpd6WEp00atkrG/XthkD8qAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T01:42:59.198225Z","bundle_sha256":"05f53ce49802b517dfaa10466c9ef4ad1b43f5921e39c10566dd83bcec4b2d36"}}