{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:XWKDVMSA2J3DE5MKBL4ENZAN7N","short_pith_number":"pith:XWKDVMSA","canonical_record":{"source":{"id":"1008.5327","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-08-30T14:24:21Z","cross_cats_sorted":[],"title_canon_sha256":"0edcb6e0805185b09cc2be8b9114d5acf4d7914434ba56a7005b30a52d945baa","abstract_canon_sha256":"0841a9fb729a84577b9646cc45bcc749edc3b1fe496e38f3bcafb5d47e191798"},"schema_version":"1.0"},"canonical_sha256":"bd943ab240d27632758a0af846e40dfb736bb286fb14adfff5a827717d2f79b3","source":{"kind":"arxiv","id":"1008.5327","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.5327","created_at":"2026-05-18T02:05:41Z"},{"alias_kind":"arxiv_version","alias_value":"1008.5327v2","created_at":"2026-05-18T02:05:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.5327","created_at":"2026-05-18T02:05:41Z"},{"alias_kind":"pith_short_12","alias_value":"XWKDVMSA2J3D","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"XWKDVMSA2J3DE5MK","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"XWKDVMSA","created_at":"2026-05-18T12:26:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:XWKDVMSA2J3DE5MKBL4ENZAN7N","target":"record","payload":{"canonical_record":{"source":{"id":"1008.5327","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-08-30T14:24:21Z","cross_cats_sorted":[],"title_canon_sha256":"0edcb6e0805185b09cc2be8b9114d5acf4d7914434ba56a7005b30a52d945baa","abstract_canon_sha256":"0841a9fb729a84577b9646cc45bcc749edc3b1fe496e38f3bcafb5d47e191798"},"schema_version":"1.0"},"canonical_sha256":"bd943ab240d27632758a0af846e40dfb736bb286fb14adfff5a827717d2f79b3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:05:41.038008Z","signature_b64":"6orVeslNGF4xXkO9z06jGO8C1myNyuzDlEMkUSg16LnfcCb+zsISPRrm1Zwh/YpRBjmAotANthMSYW3j99M6Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd943ab240d27632758a0af846e40dfb736bb286fb14adfff5a827717d2f79b3","last_reissued_at":"2026-05-18T02:05:41.037289Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:05:41.037289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1008.5327","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":"2026-05-18T02:05:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x4MsCLwUss0DjNfzKTDcco7ygDO2nC4PNuxn135tLteTDLpZvnC4sKxdEmNngcMrxtcYFxX5fGkL8qMXU0daBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:50:58.216932Z"},"content_sha256":"f243fc91b741439c95aeacfaa381f2378228d20df18d8631f721efc9e3788a36","schema_version":"1.0","event_id":"sha256:f243fc91b741439c95aeacfaa381f2378228d20df18d8631f721efc9e3788a36"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:XWKDVMSA2J3DE5MKBL4ENZAN7N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"F.O. Alves, G.A.P. Franco, J.M. Girart","submitted_at":"2010-08-30T14:24:21Z","abstract_excerpt":"We use R-band CCD linear polarimetry collected for about 12000 background field stars in 46 fields of view toward the Pipe nebula to investigate the properties of the polarization across this dark cloud. Based on archival 2MASS data we estimate that the surveyed areas present total visual extinctions in the range 0.6 < Av < 4.6. While the observed polarizations show a well ordered large scale pattern, with polarization vectors almost perpendicularly aligned to the cloud's long axis, at core scales one see details that are characteristics of each core. Although many observed stars present degre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.5327","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":"2026-05-18T02:05:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"flTCPguSlM+8A3q3xO9X8I7Ii7xmW3DNpsAFq19OLwJ9U4hh/4tPhEuAIYuCEKQ/6ymJwWiJ1zSoTHiI4S+ODQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:50:58.217277Z"},"content_sha256":"2902f9f1c89419434ad817df8a1545a1c20aca1672b32e5380030dbda0ea98c0","schema_version":"1.0","event_id":"sha256:2902f9f1c89419434ad817df8a1545a1c20aca1672b32e5380030dbda0ea98c0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XWKDVMSA2J3DE5MKBL4ENZAN7N/bundle.json","state_url":"https://pith.science/pith/XWKDVMSA2J3DE5MKBL4ENZAN7N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XWKDVMSA2J3DE5MKBL4ENZAN7N/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":"2026-06-01T21:50:58Z","links":{"resolver":"https://pith.science/pith/XWKDVMSA2J3DE5MKBL4ENZAN7N","bundle":"https://pith.science/pith/XWKDVMSA2J3DE5MKBL4ENZAN7N/bundle.json","state":"https://pith.science/pith/XWKDVMSA2J3DE5MKBL4ENZAN7N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XWKDVMSA2J3DE5MKBL4ENZAN7N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:XWKDVMSA2J3DE5MKBL4ENZAN7N","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":"0841a9fb729a84577b9646cc45bcc749edc3b1fe496e38f3bcafb5d47e191798","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-08-30T14:24:21Z","title_canon_sha256":"0edcb6e0805185b09cc2be8b9114d5acf4d7914434ba56a7005b30a52d945baa"},"schema_version":"1.0","source":{"id":"1008.5327","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.5327","created_at":"2026-05-18T02:05:41Z"},{"alias_kind":"arxiv_version","alias_value":"1008.5327v2","created_at":"2026-05-18T02:05:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.5327","created_at":"2026-05-18T02:05:41Z"},{"alias_kind":"pith_short_12","alias_value":"XWKDVMSA2J3D","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"XWKDVMSA2J3DE5MK","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"XWKDVMSA","created_at":"2026-05-18T12:26:17Z"}],"graph_snapshots":[{"event_id":"sha256:2902f9f1c89419434ad817df8a1545a1c20aca1672b32e5380030dbda0ea98c0","target":"graph","created_at":"2026-05-18T02:05:41Z","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 use R-band CCD linear polarimetry collected for about 12000 background field stars in 46 fields of view toward the Pipe nebula to investigate the properties of the polarization across this dark cloud. Based on archival 2MASS data we estimate that the surveyed areas present total visual extinctions in the range 0.6 < Av < 4.6. While the observed polarizations show a well ordered large scale pattern, with polarization vectors almost perpendicularly aligned to the cloud's long axis, at core scales one see details that are characteristics of each core. Although many observed stars present degre","authors_text":"F.O. Alves, G.A.P. Franco, J.M. Girart","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-08-30T14:24:21Z","title":"Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.5327","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:f243fc91b741439c95aeacfaa381f2378228d20df18d8631f721efc9e3788a36","target":"record","created_at":"2026-05-18T02:05:41Z","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":"0841a9fb729a84577b9646cc45bcc749edc3b1fe496e38f3bcafb5d47e191798","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-08-30T14:24:21Z","title_canon_sha256":"0edcb6e0805185b09cc2be8b9114d5acf4d7914434ba56a7005b30a52d945baa"},"schema_version":"1.0","source":{"id":"1008.5327","kind":"arxiv","version":2}},"canonical_sha256":"bd943ab240d27632758a0af846e40dfb736bb286fb14adfff5a827717d2f79b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd943ab240d27632758a0af846e40dfb736bb286fb14adfff5a827717d2f79b3","first_computed_at":"2026-05-18T02:05:41.037289Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:05:41.037289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6orVeslNGF4xXkO9z06jGO8C1myNyuzDlEMkUSg16LnfcCb+zsISPRrm1Zwh/YpRBjmAotANthMSYW3j99M6Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:05:41.038008Z","signed_message":"canonical_sha256_bytes"},"source_id":"1008.5327","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f243fc91b741439c95aeacfaa381f2378228d20df18d8631f721efc9e3788a36","sha256:2902f9f1c89419434ad817df8a1545a1c20aca1672b32e5380030dbda0ea98c0"],"state_sha256":"3767d0cd11a61b6f9efa63cb106f12b08b425b6a8a0247032f3514c5ad90248d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nZUyN4Uafh+EdSRrkC11EfsDhlboqL1rq+LP7Bjo4ioNjeVMLUIUhgmptcaVRRiTkx3kZjMoRsu76+oKZEPTDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T21:50:58.219324Z","bundle_sha256":"3ed70bec29943994377c31f07c8b75eff0098d4a921f15cf1801e02dcd8fc3fe"}}