{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:M2WLAFLA3UX6QQ7JJ32PZMMJID","short_pith_number":"pith:M2WLAFLA","canonical_record":{"source":{"id":"0911.1365","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-11-06T21:38:13Z","cross_cats_sorted":[],"title_canon_sha256":"1ccb43cbcba8c391209b9b873e5d434277b79bc2a1b9e576e031885c4dd580a5","abstract_canon_sha256":"92b3a079ae89312d7db5f60ed163b7afe9e97114783c1e99b5f62b0a0b72dd3b"},"schema_version":"1.0"},"canonical_sha256":"66acb01560dd2fe843e94ef4fcb18940f6a4b03505856a3e21d03efa401c1c0b","source":{"kind":"arxiv","id":"0911.1365","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1365","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1365v2","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1365","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"pith_short_12","alias_value":"M2WLAFLA3UX6","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"M2WLAFLA3UX6QQ7J","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"M2WLAFLA","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:M2WLAFLA3UX6QQ7JJ32PZMMJID","target":"record","payload":{"canonical_record":{"source":{"id":"0911.1365","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-11-06T21:38:13Z","cross_cats_sorted":[],"title_canon_sha256":"1ccb43cbcba8c391209b9b873e5d434277b79bc2a1b9e576e031885c4dd580a5","abstract_canon_sha256":"92b3a079ae89312d7db5f60ed163b7afe9e97114783c1e99b5f62b0a0b72dd3b"},"schema_version":"1.0"},"canonical_sha256":"66acb01560dd2fe843e94ef4fcb18940f6a4b03505856a3e21d03efa401c1c0b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:58.516362Z","signature_b64":"Yb0YWArd/+eVAL22QxACz5WrjjBug8mK2aWfUeSzeEP+p1LLKn1Pz0OZJnWI1IKFjHFrYjb09j+kNLRGC0IPAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66acb01560dd2fe843e94ef4fcb18940f6a4b03505856a3e21d03efa401c1c0b","last_reissued_at":"2026-05-18T02:10:58.515550Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:58.515550Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.1365","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":"2026-05-18T02:10:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mj5aZ9SntxEGgMYbIoHjzGsvrPeM2HxgrSEMpJRCA536NYBkwlZV8iGGLoO/EnrRUmEWMewk0dbjsiaLHjO1Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T23:19:20.983155Z"},"content_sha256":"3405136e7c6dbb442839626f43e4b44911f4fa9bfc394a1764cd4a80cc8f5a2c","schema_version":"1.0","event_id":"sha256:3405136e7c6dbb442839626f43e4b44911f4fa9bfc394a1764cd4a80cc8f5a2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:M2WLAFLA3UX6QQ7JJ32PZMMJID","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Keck/DEIMOS spectroscopic survey of the faint M31 satellites And IX, And XI, And XII, and And XIII","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Blain, A. M. N. Ferguson, A. W. McConnachie, D. B. Zucker, G. F. Lewis, J. Penarrubia, M. J. Irwin, M. L. M. Collins, N. F. Martin, R. A. Ibata, S. C. Chapman","submitted_at":"2009-11-06T21:38:13Z","abstract_excerpt":"We present the first spectroscopic analysis of the faint M31 satellite galaxies, AndXI and AndXIII, and a reanalysis of existing spectroscopic data for two further faint companions, And IX and AndXII. By combining data obtained using the DEIMOS spectrograph mounted on the Keck II telescope with deep photometry from the Suprime-Cam instrument on Subaru, we have calculated global properties for the dwarfs, such as systemic velocities, metallicites and half-light radii.We find each dwarf to be very metal poor ([Fe/H] -2 both photometrically and spectroscopically, from their stacked spectrum), and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1365","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":"2026-05-18T02:10:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uzdNwy8bOSQg9XIXOzyPLLP/YZca3WtzDJDrvW4lD//q2hSUYBhLvhDH8NJbUA1KccyVnAeOWOIJkwqRUoIeCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T23:19:20.983519Z"},"content_sha256":"b72fda997eee99e1e242ec27b211196d44e2b7bbdbe0f3d46082ca7f9c8e7653","schema_version":"1.0","event_id":"sha256:b72fda997eee99e1e242ec27b211196d44e2b7bbdbe0f3d46082ca7f9c8e7653"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M2WLAFLA3UX6QQ7JJ32PZMMJID/bundle.json","state_url":"https://pith.science/pith/M2WLAFLA3UX6QQ7JJ32PZMMJID/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M2WLAFLA3UX6QQ7JJ32PZMMJID/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":"2026-06-03T23:19:20Z","links":{"resolver":"https://pith.science/pith/M2WLAFLA3UX6QQ7JJ32PZMMJID","bundle":"https://pith.science/pith/M2WLAFLA3UX6QQ7JJ32PZMMJID/bundle.json","state":"https://pith.science/pith/M2WLAFLA3UX6QQ7JJ32PZMMJID/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M2WLAFLA3UX6QQ7JJ32PZMMJID/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:M2WLAFLA3UX6QQ7JJ32PZMMJID","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":"92b3a079ae89312d7db5f60ed163b7afe9e97114783c1e99b5f62b0a0b72dd3b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-11-06T21:38:13Z","title_canon_sha256":"1ccb43cbcba8c391209b9b873e5d434277b79bc2a1b9e576e031885c4dd580a5"},"schema_version":"1.0","source":{"id":"0911.1365","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1365","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1365v2","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1365","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"pith_short_12","alias_value":"M2WLAFLA3UX6","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"M2WLAFLA3UX6QQ7J","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"M2WLAFLA","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:b72fda997eee99e1e242ec27b211196d44e2b7bbdbe0f3d46082ca7f9c8e7653","target":"graph","created_at":"2026-05-18T02:10:58Z","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 the first spectroscopic analysis of the faint M31 satellite galaxies, AndXI and AndXIII, and a reanalysis of existing spectroscopic data for two further faint companions, And IX and AndXII. By combining data obtained using the DEIMOS spectrograph mounted on the Keck II telescope with deep photometry from the Suprime-Cam instrument on Subaru, we have calculated global properties for the dwarfs, such as systemic velocities, metallicites and half-light radii.We find each dwarf to be very metal poor ([Fe/H] -2 both photometrically and spectroscopically, from their stacked spectrum), and","authors_text":"A. Blain, A. M. N. Ferguson, A. W. McConnachie, D. B. Zucker, G. F. Lewis, J. Penarrubia, M. J. Irwin, M. L. M. Collins, N. F. Martin, R. A. Ibata, S. C. Chapman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-11-06T21:38:13Z","title":"A Keck/DEIMOS spectroscopic survey of the faint M31 satellites And IX, And XI, And XII, and And XIII"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1365","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":"sha256:3405136e7c6dbb442839626f43e4b44911f4fa9bfc394a1764cd4a80cc8f5a2c","target":"record","created_at":"2026-05-18T02:10:58Z","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":"92b3a079ae89312d7db5f60ed163b7afe9e97114783c1e99b5f62b0a0b72dd3b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-11-06T21:38:13Z","title_canon_sha256":"1ccb43cbcba8c391209b9b873e5d434277b79bc2a1b9e576e031885c4dd580a5"},"schema_version":"1.0","source":{"id":"0911.1365","kind":"arxiv","version":2}},"canonical_sha256":"66acb01560dd2fe843e94ef4fcb18940f6a4b03505856a3e21d03efa401c1c0b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66acb01560dd2fe843e94ef4fcb18940f6a4b03505856a3e21d03efa401c1c0b","first_computed_at":"2026-05-18T02:10:58.515550Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:58.515550Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Yb0YWArd/+eVAL22QxACz5WrjjBug8mK2aWfUeSzeEP+p1LLKn1Pz0OZJnWI1IKFjHFrYjb09j+kNLRGC0IPAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:58.516362Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.1365","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3405136e7c6dbb442839626f43e4b44911f4fa9bfc394a1764cd4a80cc8f5a2c","sha256:b72fda997eee99e1e242ec27b211196d44e2b7bbdbe0f3d46082ca7f9c8e7653"],"state_sha256":"5645eab0e7fc64409ae7937b802cd6379e7add2d6e90a6e6ec3431559af5c56b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qcb/qGwmzYDo48tPhjNHuZFSV5uk3n0eUDQ0p9uUDieLc7tmEnUUU7NDeM9fUry1A7RceFaRa947LZ6ZdWw6Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T23:19:20.985447Z","bundle_sha256":"e47d0534f6ffc1a30d64710546c8aad4f3b82b3f6424243f1ec7de177cabe3fc"}}