{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:GP77TYQFZE6DWOOJMTWF6SQUBC","short_pith_number":"pith:GP77TYQF","canonical_record":{"source":{"id":"1407.3509","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-13T22:26:48Z","cross_cats_sorted":[],"title_canon_sha256":"910104b9c317ab6e8ad6faaf2936db07f34e4f8e67dd2340e8832e4e8022a0b1","abstract_canon_sha256":"d6d5eafcb2faa5c9a2001fea8f5e6e43a6b0f52ebab358e31adf583c74ed3b7c"},"schema_version":"1.0"},"canonical_sha256":"33fff9e205c93c3b39c964ec5f4a1408888aa6601fc92a85c2f2e292e7e1aaf5","source":{"kind":"arxiv","id":"1407.3509","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.3509","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"arxiv_version","alias_value":"1407.3509v1","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.3509","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"pith_short_12","alias_value":"GP77TYQFZE6D","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"GP77TYQFZE6DWOOJ","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"GP77TYQF","created_at":"2026-05-18T12:28:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:GP77TYQFZE6DWOOJMTWF6SQUBC","target":"record","payload":{"canonical_record":{"source":{"id":"1407.3509","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-13T22:26:48Z","cross_cats_sorted":[],"title_canon_sha256":"910104b9c317ab6e8ad6faaf2936db07f34e4f8e67dd2340e8832e4e8022a0b1","abstract_canon_sha256":"d6d5eafcb2faa5c9a2001fea8f5e6e43a6b0f52ebab358e31adf583c74ed3b7c"},"schema_version":"1.0"},"canonical_sha256":"33fff9e205c93c3b39c964ec5f4a1408888aa6601fc92a85c2f2e292e7e1aaf5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:37.260430Z","signature_b64":"MA5Vk/cAmvfj9KgtWJw+5pljKrxayxqKnaPEy98V9Sm/2U63UIaMLbS6J9tdzXlganzU3FqDzyXY1aGmI8efBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33fff9e205c93c3b39c964ec5f4a1408888aa6601fc92a85c2f2e292e7e1aaf5","last_reissued_at":"2026-05-18T01:42:37.259956Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:37.259956Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.3509","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":"2026-05-18T01:42:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/sOOHbHy2tUU/CRzKQkrQzwo3LSxljI53iwLT5dl0pj3BxA38I0s1NcnvphaZEiyK5IJKAU7qLiYCi0j/ihqAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T01:41:21.736568Z"},"content_sha256":"acfc9557495b408a3f540662051b6f760549db231e9a46246c57bd44f6a648cd","schema_version":"1.0","event_id":"sha256:acfc9557495b408a3f540662051b6f760549db231e9a46246c57bd44f6a648cd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:GP77TYQFZE6DWOOJMTWF6SQUBC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Proper Motion of the Draco Dwarf Galaxy Based On Hubble Space Telescope Imaging","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Carlton Pryor, Edward W. Olszewski, Slawomir Piatek","submitted_at":"2014-07-13T22:26:48Z","abstract_excerpt":"We have measured the proper motion of the Draco dwarf galaxy using images at two epochs with a time baseline of about two years taken with the Hubble Space Telescope and the Advanced Camera for Surveys. Wide Field Channel 1 and 2 provide two adjacent fields, each containing a known QSO. The zero point for the proper motion is determined using both background galaxies and the QSOs and the two methods produce consistent measurements within each field. Averaging the results from the two fields gives a proper motion in the equatorial coordinate system of $(\\mu_{\\alpha},\\mu_{\\delta}) = (17.7\\pm 6.3"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.3509","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":"2026-05-18T01:42:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"79SaS9YTgedgjK6/g/up6JbP9torwtixjFRtE/sRtFt1asTvM3B7nnLPmBCzh5dCRtIH393w31QtyFpAFvYNCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T01:41:21.737228Z"},"content_sha256":"8ad9909d1d0ec500971d7e5de0a236a660ce24a4186762b7d78b8a86f06b887f","schema_version":"1.0","event_id":"sha256:8ad9909d1d0ec500971d7e5de0a236a660ce24a4186762b7d78b8a86f06b887f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GP77TYQFZE6DWOOJMTWF6SQUBC/bundle.json","state_url":"https://pith.science/pith/GP77TYQFZE6DWOOJMTWF6SQUBC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GP77TYQFZE6DWOOJMTWF6SQUBC/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":"2026-05-20T01:41:21Z","links":{"resolver":"https://pith.science/pith/GP77TYQFZE6DWOOJMTWF6SQUBC","bundle":"https://pith.science/pith/GP77TYQFZE6DWOOJMTWF6SQUBC/bundle.json","state":"https://pith.science/pith/GP77TYQFZE6DWOOJMTWF6SQUBC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GP77TYQFZE6DWOOJMTWF6SQUBC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:GP77TYQFZE6DWOOJMTWF6SQUBC","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":"d6d5eafcb2faa5c9a2001fea8f5e6e43a6b0f52ebab358e31adf583c74ed3b7c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-13T22:26:48Z","title_canon_sha256":"910104b9c317ab6e8ad6faaf2936db07f34e4f8e67dd2340e8832e4e8022a0b1"},"schema_version":"1.0","source":{"id":"1407.3509","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.3509","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"arxiv_version","alias_value":"1407.3509v1","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.3509","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"pith_short_12","alias_value":"GP77TYQFZE6D","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"GP77TYQFZE6DWOOJ","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"GP77TYQF","created_at":"2026-05-18T12:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:8ad9909d1d0ec500971d7e5de0a236a660ce24a4186762b7d78b8a86f06b887f","target":"graph","created_at":"2026-05-18T01:42:37Z","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 have measured the proper motion of the Draco dwarf galaxy using images at two epochs with a time baseline of about two years taken with the Hubble Space Telescope and the Advanced Camera for Surveys. Wide Field Channel 1 and 2 provide two adjacent fields, each containing a known QSO. The zero point for the proper motion is determined using both background galaxies and the QSOs and the two methods produce consistent measurements within each field. Averaging the results from the two fields gives a proper motion in the equatorial coordinate system of $(\\mu_{\\alpha},\\mu_{\\delta}) = (17.7\\pm 6.3","authors_text":"Carlton Pryor, Edward W. Olszewski, Slawomir Piatek","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-13T22:26:48Z","title":"Proper Motion of the Draco Dwarf Galaxy Based On Hubble Space Telescope Imaging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.3509","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:acfc9557495b408a3f540662051b6f760549db231e9a46246c57bd44f6a648cd","target":"record","created_at":"2026-05-18T01:42:37Z","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":"d6d5eafcb2faa5c9a2001fea8f5e6e43a6b0f52ebab358e31adf583c74ed3b7c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-13T22:26:48Z","title_canon_sha256":"910104b9c317ab6e8ad6faaf2936db07f34e4f8e67dd2340e8832e4e8022a0b1"},"schema_version":"1.0","source":{"id":"1407.3509","kind":"arxiv","version":1}},"canonical_sha256":"33fff9e205c93c3b39c964ec5f4a1408888aa6601fc92a85c2f2e292e7e1aaf5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33fff9e205c93c3b39c964ec5f4a1408888aa6601fc92a85c2f2e292e7e1aaf5","first_computed_at":"2026-05-18T01:42:37.259956Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:37.259956Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MA5Vk/cAmvfj9KgtWJw+5pljKrxayxqKnaPEy98V9Sm/2U63UIaMLbS6J9tdzXlganzU3FqDzyXY1aGmI8efBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:37.260430Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.3509","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:acfc9557495b408a3f540662051b6f760549db231e9a46246c57bd44f6a648cd","sha256:8ad9909d1d0ec500971d7e5de0a236a660ce24a4186762b7d78b8a86f06b887f"],"state_sha256":"142c00933e6337de7f806b0bca69f8ca3b9c67437d6ab488f955f8f1ab127605"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yB3D0CVn/udXMDqirBfN4zioCCyilBCfJm311lV5Scp5DM/mpO2Lv/dEulFuvW/WfJz8t6V0P319tbskPZ8yBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T01:41:21.743955Z","bundle_sha256":"5ea1e55c3b9e16e3949acb3c5ed7c9f329862edc601d18ab88f5dc3cdb1eedab"}}