{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:5EXWLCBHBVTWFWPT7EUVV6EFNH","short_pith_number":"pith:5EXWLCBH","canonical_record":{"source":{"id":"1011.1852","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-08T17:15:56Z","cross_cats_sorted":[],"title_canon_sha256":"f7a05c91782196ff02e65a41034d744677fd26660f3c79b566b08558363e80c3","abstract_canon_sha256":"3251faaafe4e9237ac5f18c396dff44cfa1e58a8d1d05c30e5acba4a191727a0"},"schema_version":"1.0"},"canonical_sha256":"e92f6588270d6762d9f3f9295af88569d825feffdfa66f51f92aefca60c8493c","source":{"kind":"arxiv","id":"1011.1852","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.1852","created_at":"2026-05-18T02:04:50Z"},{"alias_kind":"arxiv_version","alias_value":"1011.1852v1","created_at":"2026-05-18T02:04:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.1852","created_at":"2026-05-18T02:04:50Z"},{"alias_kind":"pith_short_12","alias_value":"5EXWLCBHBVTW","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"5EXWLCBHBVTWFWPT","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"5EXWLCBH","created_at":"2026-05-18T12:26:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:5EXWLCBHBVTWFWPT7EUVV6EFNH","target":"record","payload":{"canonical_record":{"source":{"id":"1011.1852","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-08T17:15:56Z","cross_cats_sorted":[],"title_canon_sha256":"f7a05c91782196ff02e65a41034d744677fd26660f3c79b566b08558363e80c3","abstract_canon_sha256":"3251faaafe4e9237ac5f18c396dff44cfa1e58a8d1d05c30e5acba4a191727a0"},"schema_version":"1.0"},"canonical_sha256":"e92f6588270d6762d9f3f9295af88569d825feffdfa66f51f92aefca60c8493c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:04:50.372511Z","signature_b64":"iQHUeEiaGcuoJ+atytYJlg/WyXbcVWsF2m/d0SWZR510fASD3YJUYMSbsA+GOGQlAEXjPvytEtPzXYYv7ATDBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e92f6588270d6762d9f3f9295af88569d825feffdfa66f51f92aefca60c8493c","last_reissued_at":"2026-05-18T02:04:50.371801Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:04:50.371801Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1011.1852","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:04:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VTd7TGuT64PQamaFpPO7YEsYiQku8yJyY+0laWbX3LmM/i1cuV/T13Nh0STplNNsJTyJumnL3dBvNpgbOWqwBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:08:42.868918Z"},"content_sha256":"8b57e6ec218666b1cdbf21bcb27feafafdfac44c59901b47799ac268a0c19ee1","schema_version":"1.0","event_id":"sha256:8b57e6ec218666b1cdbf21bcb27feafafdfac44c59901b47799ac268a0c19ee1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:5EXWLCBHBVTWFWPT7EUVV6EFNH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dynamical versus Stellar Masses of Ultracompact Dwarf Galaxies in the Fornax Cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Igor Chilingarian, Leopoldo Infante, Michael Hilker, Steffen Mieske","submitted_at":"2010-11-08T17:15:56Z","abstract_excerpt":"The origin of ultracompact dwarf (UCD) galaxies, compact extragalactic stellar systems, is still a puzzle for present galaxy formation models. We present the comprehensive analysis of high resolution multi-object spectroscopic data for a sample of 24 Fornax cluster UCDs obtained with VLT FLAMES. It comprises previously published data for 19 objects (Mieske et al. 2008) which we re-analysed, including 13 with available HST photometric data. Using Virtual Observatory technologies we found archival HST images for two more UCDs and then determined their structural properties. For all objects we de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.1852","kind":"arxiv","version":1},"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":"2026-05-18T02:04:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZTxwSEK5PfwQdjW9PKR+dcilONG/Y9KYjeHx2f+abEfycyEP3JAhtVWGow8vYLGRimhgM6yd+kIEX0Us6e4zBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:08:42.869270Z"},"content_sha256":"4ce5e55580706388718ff3f138a56a19302688d7de87703252109e50005680bc","schema_version":"1.0","event_id":"sha256:4ce5e55580706388718ff3f138a56a19302688d7de87703252109e50005680bc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5EXWLCBHBVTWFWPT7EUVV6EFNH/bundle.json","state_url":"https://pith.science/pith/5EXWLCBHBVTWFWPT7EUVV6EFNH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5EXWLCBHBVTWFWPT7EUVV6EFNH/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":"2026-05-25T20:08:42Z","links":{"resolver":"https://pith.science/pith/5EXWLCBHBVTWFWPT7EUVV6EFNH","bundle":"https://pith.science/pith/5EXWLCBHBVTWFWPT7EUVV6EFNH/bundle.json","state":"https://pith.science/pith/5EXWLCBHBVTWFWPT7EUVV6EFNH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5EXWLCBHBVTWFWPT7EUVV6EFNH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:5EXWLCBHBVTWFWPT7EUVV6EFNH","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":"3251faaafe4e9237ac5f18c396dff44cfa1e58a8d1d05c30e5acba4a191727a0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-08T17:15:56Z","title_canon_sha256":"f7a05c91782196ff02e65a41034d744677fd26660f3c79b566b08558363e80c3"},"schema_version":"1.0","source":{"id":"1011.1852","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.1852","created_at":"2026-05-18T02:04:50Z"},{"alias_kind":"arxiv_version","alias_value":"1011.1852v1","created_at":"2026-05-18T02:04:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.1852","created_at":"2026-05-18T02:04:50Z"},{"alias_kind":"pith_short_12","alias_value":"5EXWLCBHBVTW","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"5EXWLCBHBVTWFWPT","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"5EXWLCBH","created_at":"2026-05-18T12:26:04Z"}],"graph_snapshots":[{"event_id":"sha256:4ce5e55580706388718ff3f138a56a19302688d7de87703252109e50005680bc","target":"graph","created_at":"2026-05-18T02:04:50Z","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":"The origin of ultracompact dwarf (UCD) galaxies, compact extragalactic stellar systems, is still a puzzle for present galaxy formation models. We present the comprehensive analysis of high resolution multi-object spectroscopic data for a sample of 24 Fornax cluster UCDs obtained with VLT FLAMES. It comprises previously published data for 19 objects (Mieske et al. 2008) which we re-analysed, including 13 with available HST photometric data. Using Virtual Observatory technologies we found archival HST images for two more UCDs and then determined their structural properties. For all objects we de","authors_text":"Igor Chilingarian, Leopoldo Infante, Michael Hilker, Steffen Mieske","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-08T17:15:56Z","title":"Dynamical versus Stellar Masses of Ultracompact Dwarf Galaxies in the Fornax Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.1852","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":"sha256:8b57e6ec218666b1cdbf21bcb27feafafdfac44c59901b47799ac268a0c19ee1","target":"record","created_at":"2026-05-18T02:04:50Z","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":"3251faaafe4e9237ac5f18c396dff44cfa1e58a8d1d05c30e5acba4a191727a0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-08T17:15:56Z","title_canon_sha256":"f7a05c91782196ff02e65a41034d744677fd26660f3c79b566b08558363e80c3"},"schema_version":"1.0","source":{"id":"1011.1852","kind":"arxiv","version":1}},"canonical_sha256":"e92f6588270d6762d9f3f9295af88569d825feffdfa66f51f92aefca60c8493c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e92f6588270d6762d9f3f9295af88569d825feffdfa66f51f92aefca60c8493c","first_computed_at":"2026-05-18T02:04:50.371801Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:04:50.371801Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iQHUeEiaGcuoJ+atytYJlg/WyXbcVWsF2m/d0SWZR510fASD3YJUYMSbsA+GOGQlAEXjPvytEtPzXYYv7ATDBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:04:50.372511Z","signed_message":"canonical_sha256_bytes"},"source_id":"1011.1852","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8b57e6ec218666b1cdbf21bcb27feafafdfac44c59901b47799ac268a0c19ee1","sha256:4ce5e55580706388718ff3f138a56a19302688d7de87703252109e50005680bc"],"state_sha256":"15ea522d863e0f07aa3bc846df2a1a716f43fc479541b1a666630b5145a24c93"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WSDVGjt9zgD8CFOPvjAgLST/v/C1Ineh1mZHL+Kh8ae46ZSfkboxCupx4Kmrm7xbiQcUo5QNvdzRPb9eIVYLAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:08:42.871811Z","bundle_sha256":"ad387d7b314462a243caefb370b623027a5c9bca724bf029b4b64c08934fa5b7"}}