{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:6YP4O4QHNQFGVFLWFUHLBMXMGU","short_pith_number":"pith:6YP4O4QH","canonical_record":{"source":{"id":"1106.4322","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-21T20:11:53Z","cross_cats_sorted":[],"title_canon_sha256":"340e2a23c06f326f617c06e4ae133adb6d8931c5163628c15cb87cf4ce95da83","abstract_canon_sha256":"d3bd3553eedbd1cc5eabeb91edebcbd42a0c3fb81e497d276e00aa2692e8cd8b"},"schema_version":"1.0"},"canonical_sha256":"f61fc772076c0a6a95762d0eb0b2ec3518d995ba8a5d2e3bbd2322ad3ed11a7e","source":{"kind":"arxiv","id":"1106.4322","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.4322","created_at":"2026-05-18T03:11:47Z"},{"alias_kind":"arxiv_version","alias_value":"1106.4322v1","created_at":"2026-05-18T03:11:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.4322","created_at":"2026-05-18T03:11:47Z"},{"alias_kind":"pith_short_12","alias_value":"6YP4O4QHNQFG","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6YP4O4QHNQFGVFLW","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6YP4O4QH","created_at":"2026-05-18T12:26:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:6YP4O4QHNQFGVFLWFUHLBMXMGU","target":"record","payload":{"canonical_record":{"source":{"id":"1106.4322","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-21T20:11:53Z","cross_cats_sorted":[],"title_canon_sha256":"340e2a23c06f326f617c06e4ae133adb6d8931c5163628c15cb87cf4ce95da83","abstract_canon_sha256":"d3bd3553eedbd1cc5eabeb91edebcbd42a0c3fb81e497d276e00aa2692e8cd8b"},"schema_version":"1.0"},"canonical_sha256":"f61fc772076c0a6a95762d0eb0b2ec3518d995ba8a5d2e3bbd2322ad3ed11a7e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:11:47.400131Z","signature_b64":"JIn8jlmOljVNPmp7d82TYGSBOq3YPP1rSeJ5SI8XF/iv/mocZKQ71sVCzVeositHsP57d9bd6RkSxbE6cRs2Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f61fc772076c0a6a95762d0eb0b2ec3518d995ba8a5d2e3bbd2322ad3ed11a7e","last_reissued_at":"2026-05-18T03:11:47.399301Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:11:47.399301Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.4322","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":"2026-05-18T03:11:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LEtujYJpEgUw8cR5yyhrGKawXe4fCAcH0Za80LwGX+ylJJBeSlqwmLLI60tcVU53XrWVwKPlRsQgtBWk7xo7Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:59:14.927715Z"},"content_sha256":"f6a93ed579e45adaa27dcfd48de2058ef4fdeff1cf100b29a0daf6746693dee0","schema_version":"1.0","event_id":"sha256:f6a93ed579e45adaa27dcfd48de2058ef4fdeff1cf100b29a0daf6746693dee0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:6YP4O4QHNQFGVFLWFUHLBMXMGU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interstellar Grains: Effect of Inclusions on Extinction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"D. B. Vaidya, Nisha Katyal, Ranjan Gupta","submitted_at":"2011-06-21T20:11:53Z","abstract_excerpt":"A composite dust grain model which simultaneously explains the observed interstellar extinction, polarization, IR emission and the abundance constraints, is required. We present a composite grain model, which is made up of a host silicate oblate spheroid and graphite inclusions. The interstellar extinction curve is evaluated in the spectral region 3.4-0.1$\\mu m$ using the extinction efficiencies of the composite spheroidal grains for three axial ratios. Extinction curves are computed using the discrete dipole approximation (DDA). The model curves are subsequently compared with the average obse"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.4322","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":"2026-05-18T03:11:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QvaL2w7MQfkQJv+vlRPqy6EnyBgOhg9m0HA5NaK3EPLzcfyIcxVri00VJDyKDyvaaHad0dtB0Ml7rsrb38YpDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:59:14.928056Z"},"content_sha256":"30ddd90d2c5093e4a6eb10dcd6f7bf3dcc88cb78b6a8fb2ccd2670f9ef85d0a4","schema_version":"1.0","event_id":"sha256:30ddd90d2c5093e4a6eb10dcd6f7bf3dcc88cb78b6a8fb2ccd2670f9ef85d0a4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6YP4O4QHNQFGVFLWFUHLBMXMGU/bundle.json","state_url":"https://pith.science/pith/6YP4O4QHNQFGVFLWFUHLBMXMGU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6YP4O4QHNQFGVFLWFUHLBMXMGU/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":"2026-06-03T15:59:14Z","links":{"resolver":"https://pith.science/pith/6YP4O4QHNQFGVFLWFUHLBMXMGU","bundle":"https://pith.science/pith/6YP4O4QHNQFGVFLWFUHLBMXMGU/bundle.json","state":"https://pith.science/pith/6YP4O4QHNQFGVFLWFUHLBMXMGU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6YP4O4QHNQFGVFLWFUHLBMXMGU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:6YP4O4QHNQFGVFLWFUHLBMXMGU","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":"d3bd3553eedbd1cc5eabeb91edebcbd42a0c3fb81e497d276e00aa2692e8cd8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-21T20:11:53Z","title_canon_sha256":"340e2a23c06f326f617c06e4ae133adb6d8931c5163628c15cb87cf4ce95da83"},"schema_version":"1.0","source":{"id":"1106.4322","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.4322","created_at":"2026-05-18T03:11:47Z"},{"alias_kind":"arxiv_version","alias_value":"1106.4322v1","created_at":"2026-05-18T03:11:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.4322","created_at":"2026-05-18T03:11:47Z"},{"alias_kind":"pith_short_12","alias_value":"6YP4O4QHNQFG","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6YP4O4QHNQFGVFLW","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6YP4O4QH","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:30ddd90d2c5093e4a6eb10dcd6f7bf3dcc88cb78b6a8fb2ccd2670f9ef85d0a4","target":"graph","created_at":"2026-05-18T03:11:47Z","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":"A composite dust grain model which simultaneously explains the observed interstellar extinction, polarization, IR emission and the abundance constraints, is required. We present a composite grain model, which is made up of a host silicate oblate spheroid and graphite inclusions. The interstellar extinction curve is evaluated in the spectral region 3.4-0.1$\\mu m$ using the extinction efficiencies of the composite spheroidal grains for three axial ratios. Extinction curves are computed using the discrete dipole approximation (DDA). The model curves are subsequently compared with the average obse","authors_text":"D. B. Vaidya, Nisha Katyal, Ranjan Gupta","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-21T20:11:53Z","title":"Interstellar Grains: Effect of Inclusions on Extinction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.4322","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:f6a93ed579e45adaa27dcfd48de2058ef4fdeff1cf100b29a0daf6746693dee0","target":"record","created_at":"2026-05-18T03:11:47Z","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":"d3bd3553eedbd1cc5eabeb91edebcbd42a0c3fb81e497d276e00aa2692e8cd8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-21T20:11:53Z","title_canon_sha256":"340e2a23c06f326f617c06e4ae133adb6d8931c5163628c15cb87cf4ce95da83"},"schema_version":"1.0","source":{"id":"1106.4322","kind":"arxiv","version":1}},"canonical_sha256":"f61fc772076c0a6a95762d0eb0b2ec3518d995ba8a5d2e3bbd2322ad3ed11a7e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f61fc772076c0a6a95762d0eb0b2ec3518d995ba8a5d2e3bbd2322ad3ed11a7e","first_computed_at":"2026-05-18T03:11:47.399301Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:11:47.399301Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JIn8jlmOljVNPmp7d82TYGSBOq3YPP1rSeJ5SI8XF/iv/mocZKQ71sVCzVeositHsP57d9bd6RkSxbE6cRs2Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:11:47.400131Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.4322","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f6a93ed579e45adaa27dcfd48de2058ef4fdeff1cf100b29a0daf6746693dee0","sha256:30ddd90d2c5093e4a6eb10dcd6f7bf3dcc88cb78b6a8fb2ccd2670f9ef85d0a4"],"state_sha256":"8bf8f32b82071f2ea2d498f71324ab089c03f1b4c74668e291b08f7fc963477f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"22/UqszzPkYVbT796NjdbRiIhKY2abNDW+T0iSuKx2jToYYRAZsDJFGw93IKHa/+YL1c4UdZ+go5Adw0VBhYCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T15:59:14.930292Z","bundle_sha256":"a8551ef1a35b2113ebbb086290b8a779865ed5849c7909c0067905baca722c2d"}}