{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:S3CD7AFH2CYUCPKOFJNIYYMMOJ","short_pith_number":"pith:S3CD7AFH","canonical_record":{"source":{"id":"1204.5750","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-04-25T20:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"bd8f412a6b536341095cb16ac66d84d4f467c5d1c7af12425b222ad9068c0cac","abstract_canon_sha256":"c0dd919cbfd75013dd72ad625a5920040ef3d5ab85355d8949775c1da4eb57c5"},"schema_version":"1.0"},"canonical_sha256":"96c43f80a7d0b1413d4e2a5a8c618c724bba2ba0e15d8b28cd47e07b9ba87dcf","source":{"kind":"arxiv","id":"1204.5750","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.5750","created_at":"2026-05-18T01:57:44Z"},{"alias_kind":"arxiv_version","alias_value":"1204.5750v1","created_at":"2026-05-18T01:57:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.5750","created_at":"2026-05-18T01:57:44Z"},{"alias_kind":"pith_short_12","alias_value":"S3CD7AFH2CYU","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"S3CD7AFH2CYUCPKO","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"S3CD7AFH","created_at":"2026-05-18T12:27:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:S3CD7AFH2CYUCPKOFJNIYYMMOJ","target":"record","payload":{"canonical_record":{"source":{"id":"1204.5750","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-04-25T20:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"bd8f412a6b536341095cb16ac66d84d4f467c5d1c7af12425b222ad9068c0cac","abstract_canon_sha256":"c0dd919cbfd75013dd72ad625a5920040ef3d5ab85355d8949775c1da4eb57c5"},"schema_version":"1.0"},"canonical_sha256":"96c43f80a7d0b1413d4e2a5a8c618c724bba2ba0e15d8b28cd47e07b9ba87dcf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:44.196659Z","signature_b64":"N9U0f3z3uy5HSlP/ejzxM8orZmoYYibQcJ3e+m38oN1jdGm3PXQKysIjSyXlgH+hK6tizHq2mCgVuQSoDqB8CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"96c43f80a7d0b1413d4e2a5a8c618c724bba2ba0e15d8b28cd47e07b9ba87dcf","last_reissued_at":"2026-05-18T01:57:44.196158Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:44.196158Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.5750","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":"2026-05-18T01:57:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9B5uXQUJVT4RVQP4OPXl6sJOQZV+NaRGX/RysT3hAnAi7t1LIa/mqMfl6BbIL2KdwqVlbx8dvtl5XbZxfN8RAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:58:38.360540Z"},"content_sha256":"6c0206ccf331d3b3d0b0447a936c81b7e0f19e3bf92e2dc4bb8abc7369f7bfd7","schema_version":"1.0","event_id":"sha256:6c0206ccf331d3b3d0b0447a936c81b7e0f19e3bf92e2dc4bb8abc7369f7bfd7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:S3CD7AFH2CYUCPKOFJNIYYMMOJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Discovery of an Ultra-Faint Star Cluster in the Constellation of Ursa Minor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Felipe A. Santana, Josh D. Simon, Luis Vargas, Marla Geha, Patrick Cote, Peter Stetson, Ricardo R. Munoz, S. George Djorgovski","submitted_at":"2012-04-25T20:00:03Z","abstract_excerpt":"We report the discovery of a new ultra-faint globular cluster in the constellation of Ursa Minor, based on stellar photometry from the MegaCam imager at the Canada-France-Hawaii Telescope (CFHT). We find that this cluster, Munoz 1, is located at a distance of 45 +/- 5 kpc and at a projected distance of only 45 arcmin from the center of the Ursa Minor dSph galaxy. Using a Maximum Likelihood technique we measure a half-light radius of 0.5 arcmin, or equivalently 7 pc and an ellipticity consistent with being zero. We estimate its absolute magnitude to be M_V=-0.4 +/- 0.9, which corresponds to L_V"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.5750","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":"2026-05-18T01:57:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eTVN6gtMqVRANieIfj3vAAKJplpd21ysK3xAuaxRf1QPQfLOZr0LeQk1xe6vgesW2XaJvW9ANEUaG5zIIycYCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:58:38.360983Z"},"content_sha256":"576b65a5de0e531acaf1b153dc9090714f6caa6c4598cd98438e4d196d6d3e1a","schema_version":"1.0","event_id":"sha256:576b65a5de0e531acaf1b153dc9090714f6caa6c4598cd98438e4d196d6d3e1a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/S3CD7AFH2CYUCPKOFJNIYYMMOJ/bundle.json","state_url":"https://pith.science/pith/S3CD7AFH2CYUCPKOFJNIYYMMOJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/S3CD7AFH2CYUCPKOFJNIYYMMOJ/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":"2026-05-25T11:58:38Z","links":{"resolver":"https://pith.science/pith/S3CD7AFH2CYUCPKOFJNIYYMMOJ","bundle":"https://pith.science/pith/S3CD7AFH2CYUCPKOFJNIYYMMOJ/bundle.json","state":"https://pith.science/pith/S3CD7AFH2CYUCPKOFJNIYYMMOJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/S3CD7AFH2CYUCPKOFJNIYYMMOJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:S3CD7AFH2CYUCPKOFJNIYYMMOJ","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":"c0dd919cbfd75013dd72ad625a5920040ef3d5ab85355d8949775c1da4eb57c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-04-25T20:00:03Z","title_canon_sha256":"bd8f412a6b536341095cb16ac66d84d4f467c5d1c7af12425b222ad9068c0cac"},"schema_version":"1.0","source":{"id":"1204.5750","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.5750","created_at":"2026-05-18T01:57:44Z"},{"alias_kind":"arxiv_version","alias_value":"1204.5750v1","created_at":"2026-05-18T01:57:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.5750","created_at":"2026-05-18T01:57:44Z"},{"alias_kind":"pith_short_12","alias_value":"S3CD7AFH2CYU","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"S3CD7AFH2CYUCPKO","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"S3CD7AFH","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:576b65a5de0e531acaf1b153dc9090714f6caa6c4598cd98438e4d196d6d3e1a","target":"graph","created_at":"2026-05-18T01:57:44Z","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 the discovery of a new ultra-faint globular cluster in the constellation of Ursa Minor, based on stellar photometry from the MegaCam imager at the Canada-France-Hawaii Telescope (CFHT). We find that this cluster, Munoz 1, is located at a distance of 45 +/- 5 kpc and at a projected distance of only 45 arcmin from the center of the Ursa Minor dSph galaxy. Using a Maximum Likelihood technique we measure a half-light radius of 0.5 arcmin, or equivalently 7 pc and an ellipticity consistent with being zero. We estimate its absolute magnitude to be M_V=-0.4 +/- 0.9, which corresponds to L_V","authors_text":"Felipe A. Santana, Josh D. Simon, Luis Vargas, Marla Geha, Patrick Cote, Peter Stetson, Ricardo R. Munoz, S. George Djorgovski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-04-25T20:00:03Z","title":"The Discovery of an Ultra-Faint Star Cluster in the Constellation of Ursa Minor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.5750","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":"sha256:6c0206ccf331d3b3d0b0447a936c81b7e0f19e3bf92e2dc4bb8abc7369f7bfd7","target":"record","created_at":"2026-05-18T01:57:44Z","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":"c0dd919cbfd75013dd72ad625a5920040ef3d5ab85355d8949775c1da4eb57c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-04-25T20:00:03Z","title_canon_sha256":"bd8f412a6b536341095cb16ac66d84d4f467c5d1c7af12425b222ad9068c0cac"},"schema_version":"1.0","source":{"id":"1204.5750","kind":"arxiv","version":1}},"canonical_sha256":"96c43f80a7d0b1413d4e2a5a8c618c724bba2ba0e15d8b28cd47e07b9ba87dcf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"96c43f80a7d0b1413d4e2a5a8c618c724bba2ba0e15d8b28cd47e07b9ba87dcf","first_computed_at":"2026-05-18T01:57:44.196158Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:44.196158Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N9U0f3z3uy5HSlP/ejzxM8orZmoYYibQcJ3e+m38oN1jdGm3PXQKysIjSyXlgH+hK6tizHq2mCgVuQSoDqB8CA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:44.196659Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.5750","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6c0206ccf331d3b3d0b0447a936c81b7e0f19e3bf92e2dc4bb8abc7369f7bfd7","sha256:576b65a5de0e531acaf1b153dc9090714f6caa6c4598cd98438e4d196d6d3e1a"],"state_sha256":"86ee5bc356d68ed0ab8e966c93b7e09c12dc53fcaab131216d8cde79e82cb80a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wob3aAkvvonufvMoADMSNNLG+9P4qFvIBnbiksIvcfL5E4Yusk+LAF5Nb5UZ8GyyWsbzTEO21zaMWNJGYUT7CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T11:58:38.364967Z","bundle_sha256":"b32b1b7ac611930daa699d0e34fe34ff45477d0bca37888af4db4867b4c7dafa"}}