{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:ARFMIVZZQOOVKJM55AGGCUXPHZ","short_pith_number":"pith:ARFMIVZZ","canonical_record":{"source":{"id":"1307.3305","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-12T02:40:09Z","cross_cats_sorted":[],"title_canon_sha256":"9f7b5581aeaea2ceb3fe011a95cf36acf06656d482978be04a38dbe1872d30ef","abstract_canon_sha256":"22dbcdd9ab31b2ccc7fb5d816f41967c14e92828bd98db0684640dd33f5463d6"},"schema_version":"1.0"},"canonical_sha256":"044ac45739839d55259de80c6152ef3e6787a07c14ec111b464d4088ffe35340","source":{"kind":"arxiv","id":"1307.3305","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.3305","created_at":"2026-05-18T03:18:39Z"},{"alias_kind":"arxiv_version","alias_value":"1307.3305v1","created_at":"2026-05-18T03:18:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.3305","created_at":"2026-05-18T03:18:39Z"},{"alias_kind":"pith_short_12","alias_value":"ARFMIVZZQOOV","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"ARFMIVZZQOOVKJM5","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"ARFMIVZZ","created_at":"2026-05-18T12:27:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:ARFMIVZZQOOVKJM55AGGCUXPHZ","target":"record","payload":{"canonical_record":{"source":{"id":"1307.3305","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-12T02:40:09Z","cross_cats_sorted":[],"title_canon_sha256":"9f7b5581aeaea2ceb3fe011a95cf36acf06656d482978be04a38dbe1872d30ef","abstract_canon_sha256":"22dbcdd9ab31b2ccc7fb5d816f41967c14e92828bd98db0684640dd33f5463d6"},"schema_version":"1.0"},"canonical_sha256":"044ac45739839d55259de80c6152ef3e6787a07c14ec111b464d4088ffe35340","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:18:39.522092Z","signature_b64":"bU2RcPfFUmJYUnbiWKRXSGg1vE/yyKo1u05G5oV5XNqkicS5fcKsEPTuUd+6qTAHvzUC8MSPgZh6Pu9AkCslDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"044ac45739839d55259de80c6152ef3e6787a07c14ec111b464d4088ffe35340","last_reissued_at":"2026-05-18T03:18:39.521457Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:18:39.521457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.3305","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":"2026-05-18T03:18:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ldMeUFsv/0PsNfhbC/ILt758QJEhmfgNcrXNo3Ke5/1zF7XPRVdeS2Ucy7Ff7pEu3h2Lc478Q6UkkCGk3o/JBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:31:42.314997Z"},"content_sha256":"fc04d358d82673786acd1392303c23c8f31fcf501801a609a7bfa6ce7ae4e43c","schema_version":"1.0","event_id":"sha256:fc04d358d82673786acd1392303c23c8f31fcf501801a609a7bfa6ce7ae4e43c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:ARFMIVZZQOOVKJM55AGGCUXPHZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Anomalously Steep Reddening Law in Quasars: An Exceptional Example Observed in IRAS14026+4341","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Hongyan Zhou, Huiyuan Wang, Jianguo Wang, Jinming Bai, Peng Jiang, Tinggui Wang, Tuo Ji, Wenjuan Liu, Xiaobo Dong, Xinwen Shu","submitted_at":"2013-07-12T02:40:09Z","abstract_excerpt":"A fraction of the heavily reddened quasars require a reddening curve which is even steeper than that of the Small Magellanic Cloud. In this paper, we thoroughly characterize the anomalously steep reddening law in quasars, via an exceptional example observed in IRAS 14026+4341. By comparing the observed spectrum to the quasar composite spectrum, we derive a reddening curve in the rest-frame wavelength range of 1200 {\\AA}--10000 {\\AA}. It is featured with a steep rise at wavelengths shorter than 3000 {\\AA}, but no significant reddening at longer wavelengths. The absence of dust reddening in opti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.3305","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":"2026-05-18T03:18:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JvUK16dsef73gWE9KoiUWOr3xAa9Djjbk5H+mybcY3+4Y0l44zq/0P00bcAfUOiXiUrphnF0IrFdtTgSMPorCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:31:42.315740Z"},"content_sha256":"21f32b4cf6238b7b1d3229688c2745433658e1c55194a5edf2a2cdf5d72a1302","schema_version":"1.0","event_id":"sha256:21f32b4cf6238b7b1d3229688c2745433658e1c55194a5edf2a2cdf5d72a1302"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ARFMIVZZQOOVKJM55AGGCUXPHZ/bundle.json","state_url":"https://pith.science/pith/ARFMIVZZQOOVKJM55AGGCUXPHZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ARFMIVZZQOOVKJM55AGGCUXPHZ/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":"2026-05-20T05:31:42Z","links":{"resolver":"https://pith.science/pith/ARFMIVZZQOOVKJM55AGGCUXPHZ","bundle":"https://pith.science/pith/ARFMIVZZQOOVKJM55AGGCUXPHZ/bundle.json","state":"https://pith.science/pith/ARFMIVZZQOOVKJM55AGGCUXPHZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ARFMIVZZQOOVKJM55AGGCUXPHZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ARFMIVZZQOOVKJM55AGGCUXPHZ","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":"22dbcdd9ab31b2ccc7fb5d816f41967c14e92828bd98db0684640dd33f5463d6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-12T02:40:09Z","title_canon_sha256":"9f7b5581aeaea2ceb3fe011a95cf36acf06656d482978be04a38dbe1872d30ef"},"schema_version":"1.0","source":{"id":"1307.3305","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.3305","created_at":"2026-05-18T03:18:39Z"},{"alias_kind":"arxiv_version","alias_value":"1307.3305v1","created_at":"2026-05-18T03:18:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.3305","created_at":"2026-05-18T03:18:39Z"},{"alias_kind":"pith_short_12","alias_value":"ARFMIVZZQOOV","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"ARFMIVZZQOOVKJM5","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"ARFMIVZZ","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:21f32b4cf6238b7b1d3229688c2745433658e1c55194a5edf2a2cdf5d72a1302","target":"graph","created_at":"2026-05-18T03:18:39Z","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 fraction of the heavily reddened quasars require a reddening curve which is even steeper than that of the Small Magellanic Cloud. In this paper, we thoroughly characterize the anomalously steep reddening law in quasars, via an exceptional example observed in IRAS 14026+4341. By comparing the observed spectrum to the quasar composite spectrum, we derive a reddening curve in the rest-frame wavelength range of 1200 {\\AA}--10000 {\\AA}. It is featured with a steep rise at wavelengths shorter than 3000 {\\AA}, but no significant reddening at longer wavelengths. The absence of dust reddening in opti","authors_text":"Hongyan Zhou, Huiyuan Wang, Jianguo Wang, Jinming Bai, Peng Jiang, Tinggui Wang, Tuo Ji, Wenjuan Liu, Xiaobo Dong, Xinwen Shu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-12T02:40:09Z","title":"Anomalously Steep Reddening Law in Quasars: An Exceptional Example Observed in IRAS14026+4341"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.3305","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:fc04d358d82673786acd1392303c23c8f31fcf501801a609a7bfa6ce7ae4e43c","target":"record","created_at":"2026-05-18T03:18:39Z","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":"22dbcdd9ab31b2ccc7fb5d816f41967c14e92828bd98db0684640dd33f5463d6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-12T02:40:09Z","title_canon_sha256":"9f7b5581aeaea2ceb3fe011a95cf36acf06656d482978be04a38dbe1872d30ef"},"schema_version":"1.0","source":{"id":"1307.3305","kind":"arxiv","version":1}},"canonical_sha256":"044ac45739839d55259de80c6152ef3e6787a07c14ec111b464d4088ffe35340","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"044ac45739839d55259de80c6152ef3e6787a07c14ec111b464d4088ffe35340","first_computed_at":"2026-05-18T03:18:39.521457Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:18:39.521457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bU2RcPfFUmJYUnbiWKRXSGg1vE/yyKo1u05G5oV5XNqkicS5fcKsEPTuUd+6qTAHvzUC8MSPgZh6Pu9AkCslDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:18:39.522092Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.3305","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc04d358d82673786acd1392303c23c8f31fcf501801a609a7bfa6ce7ae4e43c","sha256:21f32b4cf6238b7b1d3229688c2745433658e1c55194a5edf2a2cdf5d72a1302"],"state_sha256":"144d012abf7137b4c8b7450dd6e38fd5c8abac8f1b56001038e124b586fb8fd5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jD63Je2NkQ5+NuPsbaAoJNVV9yDXvWzdgffX4gfcqGRzwxY3gfZDgN0aq9BIL2iHnNX0cg3sp3BqwHLh1sgCBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T05:31:42.319501Z","bundle_sha256":"a6b39f61a77fc6fe82dc0346d5e869792f24fb06c9c29818c66798ce6603d426"}}