{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:6EP4DKFL2UCZICQDR36JDSIINB","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":"cbc7259cfc4c040cf296212120046abb9ab50a0318d6f85e4c4f00c6cad0d214","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-11T20:00:00Z","title_canon_sha256":"618bf14756c34f947fd725a7ba8d7f12a39cb9ced3f4343044ac4c0522c6deb0"},"schema_version":"1.0","source":{"id":"1205.2693","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.2693","created_at":"2026-05-18T00:56:04Z"},{"alias_kind":"arxiv_version","alias_value":"1205.2693v2","created_at":"2026-05-18T00:56:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.2693","created_at":"2026-05-18T00:56:04Z"},{"alias_kind":"pith_short_12","alias_value":"6EP4DKFL2UCZ","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"6EP4DKFL2UCZICQD","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"6EP4DKFL","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:4a902978c307b8f21b60dd8d9fbb096ebf19ea7d870d753030b7bd3712f8d631","target":"graph","created_at":"2026-05-18T00:56:04Z","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 obtained precise line-of-sight radial velocities of 23 member stars of the remote halo globular cluster Palomar 4 (Pal 4) using the High Resolution Echelle Spectrograph (HIRES) at the Keck I telescope. We also measured the mass function of the cluster down to a limiting magnitude of V~28 mag using archival HST/WFPC2 imaging. We derived the cluster's surface brightness profile based on the WFPC2 data and on broad-band imaging with the Low-Resolution Imaging Spectrometer (LRIS) at the Keck II telescope. We find a mean cluster velocity of 72.55+/-0.22 km/s and a velocity dispersion of 0.87+/-0","authors_text":"Andreas H. W. K\\\"upper, Eva K. Grebel, Holger Baumgardt, Hosein Haghi, Matthias J. Frank, Michael Hilker, Patrick C\\^ot\\'e, S. G. Djorgovski","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-11T20:00:00Z","title":"The velocity dispersion and mass function of the outer halo globular cluster Palomar 4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.2693","kind":"arxiv","version":2},"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":"sha256:73400e9015a4ea50c4f6ca3172d94f1bb99bb9eba3ed25e4801763764ebe2c5f","target":"record","created_at":"2026-05-18T00:56:04Z","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":"cbc7259cfc4c040cf296212120046abb9ab50a0318d6f85e4c4f00c6cad0d214","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-11T20:00:00Z","title_canon_sha256":"618bf14756c34f947fd725a7ba8d7f12a39cb9ced3f4343044ac4c0522c6deb0"},"schema_version":"1.0","source":{"id":"1205.2693","kind":"arxiv","version":2}},"canonical_sha256":"f11fc1a8abd505940a038efc91c9086871085a33a1f6e4c4874398b12e495fbf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f11fc1a8abd505940a038efc91c9086871085a33a1f6e4c4874398b12e495fbf","first_computed_at":"2026-05-18T00:56:04.927465Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:56:04.927465Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/tmiTjMaeUSPBKNtqJxx5qrMrDfZRYWiHu2IjVXo8e46H5oNFJ9Ai1Tn1qzWSvqGp3Pgr/8F7NW/750FoDKdCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:56:04.928018Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.2693","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:73400e9015a4ea50c4f6ca3172d94f1bb99bb9eba3ed25e4801763764ebe2c5f","sha256:4a902978c307b8f21b60dd8d9fbb096ebf19ea7d870d753030b7bd3712f8d631"],"state_sha256":"138653eca3a5181c7706509ca247313135e80cfd1abaf4a4a79357e3568be1da"}