{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:EC36DEG2BDLBI3MJFOTP3N6VBB","short_pith_number":"pith:EC36DEG2","canonical_record":{"source":{"id":"1507.06653","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-23T20:00:40Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"c3b1382bf61418c5db8923987bb0964914c772b5599733ee6ca60b49e63df70e","abstract_canon_sha256":"c84defb196280a28031ae2f8fc2e7978f89724468017b2b51004d0583f165dc4"},"schema_version":"1.0"},"canonical_sha256":"20b7e190da08d6146d892ba6fdb7d508596f4ae224742514bb34d4948f3258d8","source":{"kind":"arxiv","id":"1507.06653","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.06653","created_at":"2026-05-18T01:32:59Z"},{"alias_kind":"arxiv_version","alias_value":"1507.06653v1","created_at":"2026-05-18T01:32:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.06653","created_at":"2026-05-18T01:32:59Z"},{"alias_kind":"pith_short_12","alias_value":"EC36DEG2BDLB","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EC36DEG2BDLBI3MJ","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EC36DEG2","created_at":"2026-05-18T12:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:EC36DEG2BDLBI3MJFOTP3N6VBB","target":"record","payload":{"canonical_record":{"source":{"id":"1507.06653","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-23T20:00:40Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"c3b1382bf61418c5db8923987bb0964914c772b5599733ee6ca60b49e63df70e","abstract_canon_sha256":"c84defb196280a28031ae2f8fc2e7978f89724468017b2b51004d0583f165dc4"},"schema_version":"1.0"},"canonical_sha256":"20b7e190da08d6146d892ba6fdb7d508596f4ae224742514bb34d4948f3258d8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:32:59.702996Z","signature_b64":"lQLe4mRZJsph686dc8OiYHFfgsDnegYXWPMQ6q7DtduHTTO/9zI5Zf8im+YQc/CkUg8Ue98A2QJ8OTl3BDJUBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"20b7e190da08d6146d892ba6fdb7d508596f4ae224742514bb34d4948f3258d8","last_reissued_at":"2026-05-18T01:32:59.702496Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:32:59.702496Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.06653","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":"2026-05-18T01:32:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dQrEAsf1Tb1xfiCKGz0JzsQtCOCAwgbCl9PeGaem9AuoZSXbMez14NmUK0LrPX7D927aHab2W1H+vxhd9sIvBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:13:39.156376Z"},"content_sha256":"e22940462d482d769549d107d20e37c207813dc5adb2f351a5ff2dbe7e848191","schema_version":"1.0","event_id":"sha256:e22940462d482d769549d107d20e37c207813dc5adb2f351a5ff2dbe7e848191"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:EC36DEG2BDLBI3MJFOTP3N6VBB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HST astrometry in the 30 Doradus region: measuring proper motions of individual stars in the Large Magellanic Cloud","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"(2) STScI, 3), (3) ESAC, (4) INAF-OAPd), A. Bellini (2), D. J. Lennon (2, E. Sabbi (2), H. Sana (2), I. Platais (1), J. Anderson (2), L. R. Bedin (4) ((1) JHU, R. P. van der Marel (2)","submitted_at":"2015-07-23T20:00:40Z","abstract_excerpt":"We present measurements of positions and relative proper motions in the 30 Doradus region of the Large Magellanic Cloud (LMC). We detail the construction of a single-epoch astrometric reference frame, based on specially-designed observations obtained with the two main imaging instruments ACS/WFC and WFC3/UVIS onboard the Hubble Space Telescope (HST). Internal comparisons indicate a sub milli-arc-second (mas) precision in the positions and the presence of semi-periodic systematics with a mean amplitude of ~0.8 mas. We combined these observations with numerous archival images taken with WFPC2 an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.06653","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":"2026-05-18T01:32:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0q6K5v8zzJx79KbQxjV3akvGZ1T/b/URw2hfhFCYVDDaj3Jv57MxkvuvZ3FPspSvPAaUJQbX1QCa6br9UyPMAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:13:39.157043Z"},"content_sha256":"963d91b4d75aa2073f89151f4e66d16ac30e2717dbc89ac203331d989978b527","schema_version":"1.0","event_id":"sha256:963d91b4d75aa2073f89151f4e66d16ac30e2717dbc89ac203331d989978b527"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EC36DEG2BDLBI3MJFOTP3N6VBB/bundle.json","state_url":"https://pith.science/pith/EC36DEG2BDLBI3MJFOTP3N6VBB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EC36DEG2BDLBI3MJFOTP3N6VBB/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":"2026-05-25T23:13:39Z","links":{"resolver":"https://pith.science/pith/EC36DEG2BDLBI3MJFOTP3N6VBB","bundle":"https://pith.science/pith/EC36DEG2BDLBI3MJFOTP3N6VBB/bundle.json","state":"https://pith.science/pith/EC36DEG2BDLBI3MJFOTP3N6VBB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EC36DEG2BDLBI3MJFOTP3N6VBB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:EC36DEG2BDLBI3MJFOTP3N6VBB","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":"c84defb196280a28031ae2f8fc2e7978f89724468017b2b51004d0583f165dc4","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-23T20:00:40Z","title_canon_sha256":"c3b1382bf61418c5db8923987bb0964914c772b5599733ee6ca60b49e63df70e"},"schema_version":"1.0","source":{"id":"1507.06653","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.06653","created_at":"2026-05-18T01:32:59Z"},{"alias_kind":"arxiv_version","alias_value":"1507.06653v1","created_at":"2026-05-18T01:32:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.06653","created_at":"2026-05-18T01:32:59Z"},{"alias_kind":"pith_short_12","alias_value":"EC36DEG2BDLB","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EC36DEG2BDLBI3MJ","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EC36DEG2","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:963d91b4d75aa2073f89151f4e66d16ac30e2717dbc89ac203331d989978b527","target":"graph","created_at":"2026-05-18T01:32:59Z","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 present measurements of positions and relative proper motions in the 30 Doradus region of the Large Magellanic Cloud (LMC). We detail the construction of a single-epoch astrometric reference frame, based on specially-designed observations obtained with the two main imaging instruments ACS/WFC and WFC3/UVIS onboard the Hubble Space Telescope (HST). Internal comparisons indicate a sub milli-arc-second (mas) precision in the positions and the presence of semi-periodic systematics with a mean amplitude of ~0.8 mas. We combined these observations with numerous archival images taken with WFPC2 an","authors_text":"(2) STScI, 3), (3) ESAC, (4) INAF-OAPd), A. Bellini (2), D. J. Lennon (2, E. Sabbi (2), H. Sana (2), I. Platais (1), J. Anderson (2), L. R. Bedin (4) ((1) JHU, R. P. van der Marel (2)","cross_cats":["astro-ph.GA","astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-23T20:00:40Z","title":"HST astrometry in the 30 Doradus region: measuring proper motions of individual stars in the Large Magellanic Cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.06653","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:e22940462d482d769549d107d20e37c207813dc5adb2f351a5ff2dbe7e848191","target":"record","created_at":"2026-05-18T01:32:59Z","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":"c84defb196280a28031ae2f8fc2e7978f89724468017b2b51004d0583f165dc4","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-23T20:00:40Z","title_canon_sha256":"c3b1382bf61418c5db8923987bb0964914c772b5599733ee6ca60b49e63df70e"},"schema_version":"1.0","source":{"id":"1507.06653","kind":"arxiv","version":1}},"canonical_sha256":"20b7e190da08d6146d892ba6fdb7d508596f4ae224742514bb34d4948f3258d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"20b7e190da08d6146d892ba6fdb7d508596f4ae224742514bb34d4948f3258d8","first_computed_at":"2026-05-18T01:32:59.702496Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:32:59.702496Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lQLe4mRZJsph686dc8OiYHFfgsDnegYXWPMQ6q7DtduHTTO/9zI5Zf8im+YQc/CkUg8Ue98A2QJ8OTl3BDJUBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:32:59.702996Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.06653","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e22940462d482d769549d107d20e37c207813dc5adb2f351a5ff2dbe7e848191","sha256:963d91b4d75aa2073f89151f4e66d16ac30e2717dbc89ac203331d989978b527"],"state_sha256":"2b908ab80b622bed184082ced8e1433eee169ba976ae4fd56b78267c4fe962cd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RCGoaIpGH0k6r9oFQDsxwQovXRs6U6H8IH3nkA4ac38WVPnRK/9J/8vGa9EH3Rlcdglmw1iF1ddHUrVHsNM2DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:13:39.160653Z","bundle_sha256":"3c80872316f831a81e00875cc33fa7eca2fbdd9a51e154827ff787323828ac15"}}