{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:NTZKLPPKI42KGKPVXBJQQSVWS6","short_pith_number":"pith:NTZKLPPK","canonical_record":{"source":{"id":"2106.12656","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-23T21:06:40Z","cross_cats_sorted":[],"title_canon_sha256":"4f793cefa177ab0c30593cccb3176c87c08142bc5b8bb5d8fdf36121a292b308","abstract_canon_sha256":"a5c0270a20a9ec1c75e3aa234548424e66943f0fa569f35f8aeded361feac5d0"},"schema_version":"1.0"},"canonical_sha256":"6cf2a5bdea4734a329f5b853084ab697a60115c624ad7260afe044d5e40b3705","source":{"kind":"arxiv","id":"2106.12656","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.12656","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"arxiv_version","alias_value":"2106.12656v2","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.12656","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"pith_short_12","alias_value":"NTZKLPPKI42K","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"NTZKLPPKI42KGKPV","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"NTZKLPPK","created_at":"2026-07-05T03:28:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:NTZKLPPKI42KGKPVXBJQQSVWS6","target":"record","payload":{"canonical_record":{"source":{"id":"2106.12656","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-23T21:06:40Z","cross_cats_sorted":[],"title_canon_sha256":"4f793cefa177ab0c30593cccb3176c87c08142bc5b8bb5d8fdf36121a292b308","abstract_canon_sha256":"a5c0270a20a9ec1c75e3aa234548424e66943f0fa569f35f8aeded361feac5d0"},"schema_version":"1.0"},"canonical_sha256":"6cf2a5bdea4734a329f5b853084ab697a60115c624ad7260afe044d5e40b3705","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:28:19.560070Z","signature_b64":"/j87d7lfGL7/j1H9xws+/nE1LgZt2p3G21i8/B3vO9KdyiXYCk8yG6OBk7ZsNV7I4zqblOcAM/BP024UXHUnCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6cf2a5bdea4734a329f5b853084ab697a60115c624ad7260afe044d5e40b3705","last_reissued_at":"2026-07-05T03:28:19.559551Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:28:19.559551Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.12656","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:28:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YjQMeicjF393CjdSz+4LGHuEzeGL/NB2Z3tPBAiJBMZR2VkAHWFCnurRqWJkhM/m7FW0mgEpWRvbofX26EOEDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T04:18:17.213129Z"},"content_sha256":"1477e981012a1760e785a779b51f3087050c324f17ff13c06579afe81c5f2299","schema_version":"1.0","event_id":"sha256:1477e981012a1760e785a779b51f3087050c324f17ff13c06579afe81c5f2299"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:NTZKLPPKI42KGKPVXBJQQSVWS6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Kinematics of Antlia 2 and Crater 2 from The Southern Stellar Stream Spectroscopic Survey (S5)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alexander P. Ji, Andrew B. Pace, Daniel B. Zucker, Denis Erkal, Dougal Mackey, Gary S. Da Costa, Geraint F. Lewis, Jeffrey D. Simpson, Joshua D. Simon, Joss Bland-Hawthorn, Kyler Kuehn, Lara R. Cullinane, Nora Shipp, S5 Collaboration, Sergey E. Koposov, Terese T. Hansen, Ting S. Li, Vasily Belokurov","submitted_at":"2021-06-23T21:06:40Z","abstract_excerpt":"We present new spectroscopic observations of the diffuse Milky Way satellite galaxies Antlia 2 and Crater 2, taken as part of the Southern Stellar Stream Spectroscopic Survey (S5). The new observations approximately double the number of confirmed member stars in each galaxy and more than double the spatial extent of spectroscopic observations in Antlia 2. A full kinematic analysis, including Gaia EDR3 proper motions, detects a clear velocity gradient in Antlia 2 and a tentative velocity gradient in Crater 2. The velocity gradient magnitudes and directions are consistent with particle stream si"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.12656","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2106.12656/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:28:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yhx1lRsaMbc+Ay9s4W0TiCx+rDgRySuSDhYr63hegxNaqO0JEKlrvwNdsvlibVYEv/7vbYpqRCu17+C3hy09Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T04:18:17.213819Z"},"content_sha256":"ab8f2d325984676808368b388e1765cf13f3071710b39fcbba20c38d906a1a7b","schema_version":"1.0","event_id":"sha256:ab8f2d325984676808368b388e1765cf13f3071710b39fcbba20c38d906a1a7b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NTZKLPPKI42KGKPVXBJQQSVWS6/bundle.json","state_url":"https://pith.science/pith/NTZKLPPKI42KGKPVXBJQQSVWS6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NTZKLPPKI42KGKPVXBJQQSVWS6/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":"2026-08-05T04:18:17Z","links":{"resolver":"https://pith.science/pith/NTZKLPPKI42KGKPVXBJQQSVWS6","bundle":"https://pith.science/pith/NTZKLPPKI42KGKPVXBJQQSVWS6/bundle.json","state":"https://pith.science/pith/NTZKLPPKI42KGKPVXBJQQSVWS6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NTZKLPPKI42KGKPVXBJQQSVWS6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:NTZKLPPKI42KGKPVXBJQQSVWS6","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":"a5c0270a20a9ec1c75e3aa234548424e66943f0fa569f35f8aeded361feac5d0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-23T21:06:40Z","title_canon_sha256":"4f793cefa177ab0c30593cccb3176c87c08142bc5b8bb5d8fdf36121a292b308"},"schema_version":"1.0","source":{"id":"2106.12656","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.12656","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"arxiv_version","alias_value":"2106.12656v2","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.12656","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"pith_short_12","alias_value":"NTZKLPPKI42K","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"NTZKLPPKI42KGKPV","created_at":"2026-07-05T03:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"NTZKLPPK","created_at":"2026-07-05T03:28:19Z"}],"graph_snapshots":[{"event_id":"sha256:ab8f2d325984676808368b388e1765cf13f3071710b39fcbba20c38d906a1a7b","target":"graph","created_at":"2026-07-05T03:28:19Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2106.12656/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present new spectroscopic observations of the diffuse Milky Way satellite galaxies Antlia 2 and Crater 2, taken as part of the Southern Stellar Stream Spectroscopic Survey (S5). The new observations approximately double the number of confirmed member stars in each galaxy and more than double the spatial extent of spectroscopic observations in Antlia 2. A full kinematic analysis, including Gaia EDR3 proper motions, detects a clear velocity gradient in Antlia 2 and a tentative velocity gradient in Crater 2. The velocity gradient magnitudes and directions are consistent with particle stream si","authors_text":"Alexander P. Ji, Andrew B. Pace, Daniel B. Zucker, Denis Erkal, Dougal Mackey, Gary S. Da Costa, Geraint F. Lewis, Jeffrey D. Simpson, Joshua D. Simon, Joss Bland-Hawthorn, Kyler Kuehn, Lara R. Cullinane, Nora Shipp, S5 Collaboration, Sergey E. Koposov, Terese T. Hansen, Ting S. Li, Vasily Belokurov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-23T21:06:40Z","title":"Kinematics of Antlia 2 and Crater 2 from The Southern Stellar Stream Spectroscopic Survey (S5)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.12656","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":"sha256:1477e981012a1760e785a779b51f3087050c324f17ff13c06579afe81c5f2299","target":"record","created_at":"2026-07-05T03:28:19Z","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":"a5c0270a20a9ec1c75e3aa234548424e66943f0fa569f35f8aeded361feac5d0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-23T21:06:40Z","title_canon_sha256":"4f793cefa177ab0c30593cccb3176c87c08142bc5b8bb5d8fdf36121a292b308"},"schema_version":"1.0","source":{"id":"2106.12656","kind":"arxiv","version":2}},"canonical_sha256":"6cf2a5bdea4734a329f5b853084ab697a60115c624ad7260afe044d5e40b3705","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6cf2a5bdea4734a329f5b853084ab697a60115c624ad7260afe044d5e40b3705","first_computed_at":"2026-07-05T03:28:19.559551Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:28:19.559551Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/j87d7lfGL7/j1H9xws+/nE1LgZt2p3G21i8/B3vO9KdyiXYCk8yG6OBk7ZsNV7I4zqblOcAM/BP024UXHUnCg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:28:19.560070Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.12656","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1477e981012a1760e785a779b51f3087050c324f17ff13c06579afe81c5f2299","sha256:ab8f2d325984676808368b388e1765cf13f3071710b39fcbba20c38d906a1a7b"],"state_sha256":"fba9fc94e24187ed52df9b090b598e2efa8261be53356740bd164f6e99fd0a09"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nWeCfBr6C6YXUD3w5LiBlOubPYknrnnC+LLveOUT9e3qBFmHEtmnNalVJxVUL1wewJTClk8PlkCpnOmzcZ/oBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T04:18:17.218157Z","bundle_sha256":"c8d1e619b31ef2b96fb786f0b5ecafdfa3b49ae063e51db254f0575cc2afc257"}}