{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:O6DZYHU2L3BCIU2TDTRTI7OTLL","short_pith_number":"pith:O6DZYHU2","canonical_record":{"source":{"id":"1612.03752","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T15:42:59Z","cross_cats_sorted":[],"title_canon_sha256":"3959b475ed7af99673aecd3d849bc19203bb032d16fef39db0f11d4606212395","abstract_canon_sha256":"9633e212e585dcb2e7e367b0d879a02026f24e8aac1ebb5bb6eb5f43b937256e"},"schema_version":"1.0"},"canonical_sha256":"77879c1e9a5ec22453531ce3347dd35ae68005f9f339478d79cb4a0a457c2e84","source":{"kind":"arxiv","id":"1612.03752","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.03752","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"arxiv_version","alias_value":"1612.03752v1","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.03752","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"pith_short_12","alias_value":"O6DZYHU2L3BC","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"O6DZYHU2L3BCIU2T","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"O6DZYHU2","created_at":"2026-05-18T12:30:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:O6DZYHU2L3BCIU2TDTRTI7OTLL","target":"record","payload":{"canonical_record":{"source":{"id":"1612.03752","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T15:42:59Z","cross_cats_sorted":[],"title_canon_sha256":"3959b475ed7af99673aecd3d849bc19203bb032d16fef39db0f11d4606212395","abstract_canon_sha256":"9633e212e585dcb2e7e367b0d879a02026f24e8aac1ebb5bb6eb5f43b937256e"},"schema_version":"1.0"},"canonical_sha256":"77879c1e9a5ec22453531ce3347dd35ae68005f9f339478d79cb4a0a457c2e84","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:29.329353Z","signature_b64":"EHtpaiZ+Mvb3KK/PMt0gNIwBQiKtnubFBhr1lcMOsfS9TrcJfLm+yoyYavRQwESPirH4ByI+AI8XECivYHSCAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"77879c1e9a5ec22453531ce3347dd35ae68005f9f339478d79cb4a0a457c2e84","last_reissued_at":"2026-05-18T00:53:29.328837Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:29.328837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.03752","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":"2026-05-18T00:53:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0HrrlRd5D2+FFDtDFgxbIY6BqtDcW96g+L1chihSYMEOsSG7C/eYoVxj83X1/3umRGza8UXfH+Urnwi3nn3yBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:36:42.165347Z"},"content_sha256":"3eed3214151d395c25e799af11415d2fb69ab821f32881df55ca0a707fbdf476","schema_version":"1.0","event_id":"sha256:3eed3214151d395c25e799af11415d2fb69ab821f32881df55ca0a707fbdf476"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:O6DZYHU2L3BCIU2TDTRTI7OTLL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Angular Momentum of Dwarf Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Danail Obreschkow, Kirsty M. Butler, Se-Heon Oh","submitted_at":"2016-12-12T15:42:59Z","abstract_excerpt":"We present measurements of baryonic mass Mb and specific angular momentum (sAM) jb in 14 rotating dwarf Irregular (dIrr) galaxies from the LITTLE THINGS sample. These measurements, based on 21cm kinematic data from the Very Large Array and stellar mass maps from the Spitzer Space Telescope, extend previous AM measurements by more than two orders of magnitude in Mb. The dwarf galaxies show systematically higher jb values than expected from the jb~Mb^{2/3} scaling of spiral galaxies, representative of a scale-free galaxy formation scenario. This offset can be explained by decreasing baryon mass "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.03752","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":"2026-05-18T00:53:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q/zGxWM+zLSNbcMp61vUcQ4/qjgwp+uVjxd6Xugguxtrn1W9zgF9pbFGudaPYepBX6ST/eGOXxxC8jwNs52CAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:36:42.166032Z"},"content_sha256":"13a5718159e24d6b69c422ead4616fd5bbce8b0a57b6c66040baf4b9755c693c","schema_version":"1.0","event_id":"sha256:13a5718159e24d6b69c422ead4616fd5bbce8b0a57b6c66040baf4b9755c693c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O6DZYHU2L3BCIU2TDTRTI7OTLL/bundle.json","state_url":"https://pith.science/pith/O6DZYHU2L3BCIU2TDTRTI7OTLL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O6DZYHU2L3BCIU2TDTRTI7OTLL/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":"2026-05-26T22:36:42Z","links":{"resolver":"https://pith.science/pith/O6DZYHU2L3BCIU2TDTRTI7OTLL","bundle":"https://pith.science/pith/O6DZYHU2L3BCIU2TDTRTI7OTLL/bundle.json","state":"https://pith.science/pith/O6DZYHU2L3BCIU2TDTRTI7OTLL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O6DZYHU2L3BCIU2TDTRTI7OTLL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:O6DZYHU2L3BCIU2TDTRTI7OTLL","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":"9633e212e585dcb2e7e367b0d879a02026f24e8aac1ebb5bb6eb5f43b937256e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T15:42:59Z","title_canon_sha256":"3959b475ed7af99673aecd3d849bc19203bb032d16fef39db0f11d4606212395"},"schema_version":"1.0","source":{"id":"1612.03752","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.03752","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"arxiv_version","alias_value":"1612.03752v1","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.03752","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"pith_short_12","alias_value":"O6DZYHU2L3BC","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"O6DZYHU2L3BCIU2T","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"O6DZYHU2","created_at":"2026-05-18T12:30:36Z"}],"graph_snapshots":[{"event_id":"sha256:13a5718159e24d6b69c422ead4616fd5bbce8b0a57b6c66040baf4b9755c693c","target":"graph","created_at":"2026-05-18T00:53:29Z","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 baryonic mass Mb and specific angular momentum (sAM) jb in 14 rotating dwarf Irregular (dIrr) galaxies from the LITTLE THINGS sample. These measurements, based on 21cm kinematic data from the Very Large Array and stellar mass maps from the Spitzer Space Telescope, extend previous AM measurements by more than two orders of magnitude in Mb. The dwarf galaxies show systematically higher jb values than expected from the jb~Mb^{2/3} scaling of spiral galaxies, representative of a scale-free galaxy formation scenario. This offset can be explained by decreasing baryon mass ","authors_text":"Danail Obreschkow, Kirsty M. Butler, Se-Heon Oh","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T15:42:59Z","title":"Angular Momentum of Dwarf Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.03752","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":"sha256:3eed3214151d395c25e799af11415d2fb69ab821f32881df55ca0a707fbdf476","target":"record","created_at":"2026-05-18T00:53:29Z","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":"9633e212e585dcb2e7e367b0d879a02026f24e8aac1ebb5bb6eb5f43b937256e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T15:42:59Z","title_canon_sha256":"3959b475ed7af99673aecd3d849bc19203bb032d16fef39db0f11d4606212395"},"schema_version":"1.0","source":{"id":"1612.03752","kind":"arxiv","version":1}},"canonical_sha256":"77879c1e9a5ec22453531ce3347dd35ae68005f9f339478d79cb4a0a457c2e84","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"77879c1e9a5ec22453531ce3347dd35ae68005f9f339478d79cb4a0a457c2e84","first_computed_at":"2026-05-18T00:53:29.328837Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:53:29.328837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EHtpaiZ+Mvb3KK/PMt0gNIwBQiKtnubFBhr1lcMOsfS9TrcJfLm+yoyYavRQwESPirH4ByI+AI8XECivYHSCAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:53:29.329353Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.03752","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3eed3214151d395c25e799af11415d2fb69ab821f32881df55ca0a707fbdf476","sha256:13a5718159e24d6b69c422ead4616fd5bbce8b0a57b6c66040baf4b9755c693c"],"state_sha256":"41b157390ec19484a65df16df4e37135ea4a05244b9175e6946f7102dcfe6231"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pt16OL87viue8sg29ZoMGsHj5TCyltoXk4KiYH15gTpX0+Lp2PxhjatxbvsKZ5+2dhvK6fzzkiC4v303YqKOAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T22:36:42.169383Z","bundle_sha256":"add5763ab777c8895040814462228aaac33f26fdc4e3b57049e442e2a1c067c3"}}