{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:XABADSVAA2L262YKNOC7U7XCUA","short_pith_number":"pith:XABADSVA","canonical_record":{"source":{"id":"1703.09230","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-27T18:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"9b0f9b11c91649958bc8d3f47d07d9b029b79c743ab7ed4f18612d1a9c6ddaa6","abstract_canon_sha256":"d455efb89ca8c62ce063e5705837fab05a642227c05209bd3d3d3c622dc87424"},"schema_version":"1.0"},"canonical_sha256":"b80201caa00697af6b0a6b85fa7ee2a002e27e2c9106a3c6aae9b9113ba34ef2","source":{"kind":"arxiv","id":"1703.09230","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.09230","created_at":"2026-05-18T00:40:06Z"},{"alias_kind":"arxiv_version","alias_value":"1703.09230v2","created_at":"2026-05-18T00:40:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.09230","created_at":"2026-05-18T00:40:06Z"},{"alias_kind":"pith_short_12","alias_value":"XABADSVAA2L2","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"XABADSVAA2L262YK","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"XABADSVA","created_at":"2026-05-18T12:31:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:XABADSVAA2L262YKNOC7U7XCUA","target":"record","payload":{"canonical_record":{"source":{"id":"1703.09230","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-27T18:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"9b0f9b11c91649958bc8d3f47d07d9b029b79c743ab7ed4f18612d1a9c6ddaa6","abstract_canon_sha256":"d455efb89ca8c62ce063e5705837fab05a642227c05209bd3d3d3c622dc87424"},"schema_version":"1.0"},"canonical_sha256":"b80201caa00697af6b0a6b85fa7ee2a002e27e2c9106a3c6aae9b9113ba34ef2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:06.614418Z","signature_b64":"TFfyYz46AhzGg/UD9kES9ga6v53eSCMPck768SHid0Y63+2ZKJPXEH77x+JDcu8hE1bMTRpk5GtVrE929cLZBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b80201caa00697af6b0a6b85fa7ee2a002e27e2c9106a3c6aae9b9113ba34ef2","last_reissued_at":"2026-05-18T00:40:06.613758Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:06.613758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.09230","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":"2026-05-18T00:40:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h32HkUiPxE/EFTiL2Q4cO+BQhT5EopRHq+uyDt18Tyz1ZhZD2vqOTUUGnWVPCmPMUz1omSq96Nc5YFjZ08bTAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T03:48:26.386615Z"},"content_sha256":"c69f090665e60be33f9d98a71675df2352f67bae4a6c417e2c8293e49e14bef9","schema_version":"1.0","event_id":"sha256:c69f090665e60be33f9d98a71675df2352f67bae4a6c417e2c8293e49e14bef9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:XABADSVAA2L262YKNOC7U7XCUA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The slight spin of the old stellar halo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alis J. Deason (Durham), CMU), Facundo A. Gomez (MPA), Federico Marinacci (MIT), Robert J. Grand (Heidelberg), Rudiger Pakmor (Heidelberg), Sergey E. Koposov (Cambridge, Vasily Belokurov (Cambridge)","submitted_at":"2017-03-27T18:00:04Z","abstract_excerpt":"We combine Gaia data release 1 astrometry with Sloan Digital Sky Survey (SDSS) images taken some ~10-15 years earlier, to measure proper motions of stars in the halo of our Galaxy. The SDSS-Gaia proper motions have typical statistical errors of 2 mas/yr down to r ~ 20 mag, and are robust to variations with magnitude and colour. Armed with this exquisite set of halo proper motions, we identify RR Lyrae, blue horizontal branch (BHB), and K giant stars in the halo, and measure their net rotation with respect to the Galactic disc. We find evidence for a gently rotating prograde signal (< $V_\\phi$ "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.09230","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":""},"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":"2026-05-18T00:40:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xRWPXBFWD2ezGbhpRV32ML81dXol8Ysp0jdxEMaMtf05jZS605S4C9tlzpI1jwpF44CnH+YfB9MvPqrOZlonAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T03:48:26.387169Z"},"content_sha256":"04488d1bb19b621a459177373a1ee6ca7124e93341f2829b7623e660632c83d6","schema_version":"1.0","event_id":"sha256:04488d1bb19b621a459177373a1ee6ca7124e93341f2829b7623e660632c83d6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XABADSVAA2L262YKNOC7U7XCUA/bundle.json","state_url":"https://pith.science/pith/XABADSVAA2L262YKNOC7U7XCUA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XABADSVAA2L262YKNOC7U7XCUA/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":"2026-06-04T03:48:26Z","links":{"resolver":"https://pith.science/pith/XABADSVAA2L262YKNOC7U7XCUA","bundle":"https://pith.science/pith/XABADSVAA2L262YKNOC7U7XCUA/bundle.json","state":"https://pith.science/pith/XABADSVAA2L262YKNOC7U7XCUA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XABADSVAA2L262YKNOC7U7XCUA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:XABADSVAA2L262YKNOC7U7XCUA","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":"d455efb89ca8c62ce063e5705837fab05a642227c05209bd3d3d3c622dc87424","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-27T18:00:04Z","title_canon_sha256":"9b0f9b11c91649958bc8d3f47d07d9b029b79c743ab7ed4f18612d1a9c6ddaa6"},"schema_version":"1.0","source":{"id":"1703.09230","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.09230","created_at":"2026-05-18T00:40:06Z"},{"alias_kind":"arxiv_version","alias_value":"1703.09230v2","created_at":"2026-05-18T00:40:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.09230","created_at":"2026-05-18T00:40:06Z"},{"alias_kind":"pith_short_12","alias_value":"XABADSVAA2L2","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"XABADSVAA2L262YK","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"XABADSVA","created_at":"2026-05-18T12:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:04488d1bb19b621a459177373a1ee6ca7124e93341f2829b7623e660632c83d6","target":"graph","created_at":"2026-05-18T00:40:06Z","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 combine Gaia data release 1 astrometry with Sloan Digital Sky Survey (SDSS) images taken some ~10-15 years earlier, to measure proper motions of stars in the halo of our Galaxy. The SDSS-Gaia proper motions have typical statistical errors of 2 mas/yr down to r ~ 20 mag, and are robust to variations with magnitude and colour. Armed with this exquisite set of halo proper motions, we identify RR Lyrae, blue horizontal branch (BHB), and K giant stars in the halo, and measure their net rotation with respect to the Galactic disc. We find evidence for a gently rotating prograde signal (< $V_\\phi$ ","authors_text":"Alis J. Deason (Durham), CMU), Facundo A. Gomez (MPA), Federico Marinacci (MIT), Robert J. Grand (Heidelberg), Rudiger Pakmor (Heidelberg), Sergey E. Koposov (Cambridge, Vasily Belokurov (Cambridge)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-27T18:00:04Z","title":"The slight spin of the old stellar halo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.09230","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:c69f090665e60be33f9d98a71675df2352f67bae4a6c417e2c8293e49e14bef9","target":"record","created_at":"2026-05-18T00:40:06Z","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":"d455efb89ca8c62ce063e5705837fab05a642227c05209bd3d3d3c622dc87424","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-27T18:00:04Z","title_canon_sha256":"9b0f9b11c91649958bc8d3f47d07d9b029b79c743ab7ed4f18612d1a9c6ddaa6"},"schema_version":"1.0","source":{"id":"1703.09230","kind":"arxiv","version":2}},"canonical_sha256":"b80201caa00697af6b0a6b85fa7ee2a002e27e2c9106a3c6aae9b9113ba34ef2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b80201caa00697af6b0a6b85fa7ee2a002e27e2c9106a3c6aae9b9113ba34ef2","first_computed_at":"2026-05-18T00:40:06.613758Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:40:06.613758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TFfyYz46AhzGg/UD9kES9ga6v53eSCMPck768SHid0Y63+2ZKJPXEH77x+JDcu8hE1bMTRpk5GtVrE929cLZBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:40:06.614418Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.09230","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c69f090665e60be33f9d98a71675df2352f67bae4a6c417e2c8293e49e14bef9","sha256:04488d1bb19b621a459177373a1ee6ca7124e93341f2829b7623e660632c83d6"],"state_sha256":"3724e7fa1658bcfc63af83eafb54b777eddcb246a7a2020fa1993f52ca7ee390"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ins/Ira2EPa3goBFaqtS9dhk8NqT52g5wxJPtENyjbq+rqYqKY8kuz6ZukDGACBEkHRyDKQiESTOhONs0fGLBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T03:48:26.390165Z","bundle_sha256":"c86f798b35d7a24ea4b3e2fb59a0f94c4c4beac9ef66320cd675bc49683eeabf"}}