{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:COO54EE246G2W7UZWFHGLEGD5S","short_pith_number":"pith:COO54EE2","canonical_record":{"source":{"id":"1901.05975","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-17T19:00:06Z","cross_cats_sorted":[],"title_canon_sha256":"80eed862303c8dff0d072c179514898aa61eaba08ea513b14c69ac60977b353f","abstract_canon_sha256":"bb85ce86802439b25b35834b803fed2075e6dde0e6f9374fec57ed012a4b1f55"},"schema_version":"1.0"},"canonical_sha256":"139dde109ae78dab7e99b14e6590c3ec884775c7f46f78e12a55ba6c42f0eaff","source":{"kind":"arxiv","id":"1901.05975","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05975","created_at":"2026-05-17T23:54:21Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05975v2","created_at":"2026-05-17T23:54:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05975","created_at":"2026-05-17T23:54:21Z"},{"alias_kind":"pith_short_12","alias_value":"COO54EE246G2","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"COO54EE246G2W7UZ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"COO54EE2","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:COO54EE246G2W7UZWFHGLEGD5S","target":"record","payload":{"canonical_record":{"source":{"id":"1901.05975","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-17T19:00:06Z","cross_cats_sorted":[],"title_canon_sha256":"80eed862303c8dff0d072c179514898aa61eaba08ea513b14c69ac60977b353f","abstract_canon_sha256":"bb85ce86802439b25b35834b803fed2075e6dde0e6f9374fec57ed012a4b1f55"},"schema_version":"1.0"},"canonical_sha256":"139dde109ae78dab7e99b14e6590c3ec884775c7f46f78e12a55ba6c42f0eaff","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:21.695513Z","signature_b64":"N93DwFmbt3Bsd7fiNII/G7dzvsyGUenMqtYCU2fWOg3XbABP4NvtrN7OwsQ6M6ne+rSMUsbXwECq4NswRxyeCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"139dde109ae78dab7e99b14e6590c3ec884775c7f46f78e12a55ba6c42f0eaff","last_reissued_at":"2026-05-17T23:54:21.694874Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:21.694874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.05975","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":"2026-05-17T23:54:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rYcDbmRX0i/NGzPo5J3q7rF0zJm1YdsgRnzT8OBICXkwY1F0OrmzFv9y8WZM8VsuYWKRLVXfMT9jZBfSfQPBCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T15:30:24.435063Z"},"content_sha256":"ba4336b232d9ebd639a6255fedd1512bb1ac022dd8764ab8cf7ff12c3d0955f5","schema_version":"1.0","event_id":"sha256:ba4336b232d9ebd639a6255fedd1512bb1ac022dd8764ab8cf7ff12c3d0955f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:COO54EE246G2W7UZWFHGLEGD5S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental phase function and degree of linear polarization of cometary dust analogs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Alberto Cellino, Daniel Guirado, Elisa Frattin, Fernando Moreno, Fiorangela La Forgia, Francois Raulin, Gabriele Cremonese, Giampiero Naletto, Ivano Bertini, Jacopo Nava, Jes\\'us Escobar-Cerezo, Juan Carlos Gomez Martin, Monica Lazzarin, Olga Mu\\~noz, Patrice Coll","submitted_at":"2019-01-17T19:00:06Z","abstract_excerpt":"We present experimental phase function and degree of linear polarization curves for seven samples of cometary dust analogues namely: ground pieces of Allende, DaG521, FRO95002 and FRO99040 meteorites, Mg-rich olivine and pyroxene, and a sample of organic tholins. The experimental curves have been obtained at the IAA Cosmic Dust Laboratory at a wavelength of 520 nm covering a phase angle range from 3{\\deg} to 175{\\deg}. We also provide values of the backscattering enhancement (BCE) for our cometary analogue samples. The final goal of this work is to compare our experimental curves with observat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05975","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":"2026-05-17T23:54:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SoYtOWG96QfmtNvfk7JEVycj+MWd+YLkc9UxIPd6SDHcyiTXwi6CQsUMnM5O3Atoz6/TzV+KpCY0aHOudElAAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T15:30:24.435421Z"},"content_sha256":"65b8bdb53e5a9db4560b174b16f1b6c64b29f87043d81d58111d6f40e5a69225","schema_version":"1.0","event_id":"sha256:65b8bdb53e5a9db4560b174b16f1b6c64b29f87043d81d58111d6f40e5a69225"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/COO54EE246G2W7UZWFHGLEGD5S/bundle.json","state_url":"https://pith.science/pith/COO54EE246G2W7UZWFHGLEGD5S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/COO54EE246G2W7UZWFHGLEGD5S/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":"2026-06-27T15:30:24Z","links":{"resolver":"https://pith.science/pith/COO54EE246G2W7UZWFHGLEGD5S","bundle":"https://pith.science/pith/COO54EE246G2W7UZWFHGLEGD5S/bundle.json","state":"https://pith.science/pith/COO54EE246G2W7UZWFHGLEGD5S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/COO54EE246G2W7UZWFHGLEGD5S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:COO54EE246G2W7UZWFHGLEGD5S","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":"bb85ce86802439b25b35834b803fed2075e6dde0e6f9374fec57ed012a4b1f55","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-17T19:00:06Z","title_canon_sha256":"80eed862303c8dff0d072c179514898aa61eaba08ea513b14c69ac60977b353f"},"schema_version":"1.0","source":{"id":"1901.05975","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05975","created_at":"2026-05-17T23:54:21Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05975v2","created_at":"2026-05-17T23:54:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05975","created_at":"2026-05-17T23:54:21Z"},{"alias_kind":"pith_short_12","alias_value":"COO54EE246G2","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"COO54EE246G2W7UZ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"COO54EE2","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:65b8bdb53e5a9db4560b174b16f1b6c64b29f87043d81d58111d6f40e5a69225","target":"graph","created_at":"2026-05-17T23:54:21Z","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 experimental phase function and degree of linear polarization curves for seven samples of cometary dust analogues namely: ground pieces of Allende, DaG521, FRO95002 and FRO99040 meteorites, Mg-rich olivine and pyroxene, and a sample of organic tholins. The experimental curves have been obtained at the IAA Cosmic Dust Laboratory at a wavelength of 520 nm covering a phase angle range from 3{\\deg} to 175{\\deg}. We also provide values of the backscattering enhancement (BCE) for our cometary analogue samples. The final goal of this work is to compare our experimental curves with observat","authors_text":"Alberto Cellino, Daniel Guirado, Elisa Frattin, Fernando Moreno, Fiorangela La Forgia, Francois Raulin, Gabriele Cremonese, Giampiero Naletto, Ivano Bertini, Jacopo Nava, Jes\\'us Escobar-Cerezo, Juan Carlos Gomez Martin, Monica Lazzarin, Olga Mu\\~noz, Patrice Coll","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-17T19:00:06Z","title":"Experimental phase function and degree of linear polarization of cometary dust analogs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05975","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:ba4336b232d9ebd639a6255fedd1512bb1ac022dd8764ab8cf7ff12c3d0955f5","target":"record","created_at":"2026-05-17T23:54:21Z","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":"bb85ce86802439b25b35834b803fed2075e6dde0e6f9374fec57ed012a4b1f55","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-17T19:00:06Z","title_canon_sha256":"80eed862303c8dff0d072c179514898aa61eaba08ea513b14c69ac60977b353f"},"schema_version":"1.0","source":{"id":"1901.05975","kind":"arxiv","version":2}},"canonical_sha256":"139dde109ae78dab7e99b14e6590c3ec884775c7f46f78e12a55ba6c42f0eaff","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"139dde109ae78dab7e99b14e6590c3ec884775c7f46f78e12a55ba6c42f0eaff","first_computed_at":"2026-05-17T23:54:21.694874Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:21.694874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N93DwFmbt3Bsd7fiNII/G7dzvsyGUenMqtYCU2fWOg3XbABP4NvtrN7OwsQ6M6ne+rSMUsbXwECq4NswRxyeCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:21.695513Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.05975","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ba4336b232d9ebd639a6255fedd1512bb1ac022dd8764ab8cf7ff12c3d0955f5","sha256:65b8bdb53e5a9db4560b174b16f1b6c64b29f87043d81d58111d6f40e5a69225"],"state_sha256":"f9beeae0579f0c261675b873cb62babe655d8ca878282b4462e7b497dfe4fdab"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qWRsigp9sTP1mRRsD+hbNdCV9fw3hWOYdIAqRKgKWkFSrdHMi7sxPF3DiHSaUc6xdVBp76OFBZclJ7X5DULRBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T15:30:24.437195Z","bundle_sha256":"ad5e26b7477f4597a1fd2f5d0cb1dbda274aca50f97a41e0f3dd9116e9a086e6"}}