{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:WOOIXRCZ73UJD5YNSIKUF6QYQS","short_pith_number":"pith:WOOIXRCZ","canonical_record":{"source":{"id":"0704.3203","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-24T15:01:09Z","cross_cats_sorted":[],"title_canon_sha256":"d174aa77915e0bce6e51728ceff99bd3ce34bb37a0453e1a3eb17744ed272cb8","abstract_canon_sha256":"a719eb71e5fe0ea8960a7f4e91cc6eef68643b97115c17efb3c28240d9b7379c"},"schema_version":"1.0"},"canonical_sha256":"b39c8bc459fee891f70d921542fa1884a4b8e38794f781397b7ea1280dd33182","source":{"kind":"arxiv","id":"0704.3203","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0704.3203","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"arxiv_version","alias_value":"0704.3203v1","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0704.3203","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"pith_short_12","alias_value":"WOOIXRCZ73UJ","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"WOOIXRCZ73UJD5YN","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"WOOIXRCZ","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:WOOIXRCZ73UJD5YNSIKUF6QYQS","target":"record","payload":{"canonical_record":{"source":{"id":"0704.3203","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-24T15:01:09Z","cross_cats_sorted":[],"title_canon_sha256":"d174aa77915e0bce6e51728ceff99bd3ce34bb37a0453e1a3eb17744ed272cb8","abstract_canon_sha256":"a719eb71e5fe0ea8960a7f4e91cc6eef68643b97115c17efb3c28240d9b7379c"},"schema_version":"1.0"},"canonical_sha256":"b39c8bc459fee891f70d921542fa1884a4b8e38794f781397b7ea1280dd33182","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:16:31.492904Z","signature_b64":"rE1mNt/N3SgqPJNzrtWsO9usKz3HnQWKwOXXGnCNTsbXt9oAQPB3HinAo2075iz4vo3bEiFNUrQn9zxcqa4EDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b39c8bc459fee891f70d921542fa1884a4b8e38794f781397b7ea1280dd33182","last_reissued_at":"2026-05-18T02:16:31.492271Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:16:31.492271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0704.3203","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":"2026-05-18T02:16:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QFqUoWGOV/ut9Zmtj+UITYMVK+1nFOA6O1fEimU76q6uxfbfLTpLS7uSRTRvPoNAPwNWKHGznf1aUk96JkoTDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:59:46.669491Z"},"content_sha256":"0288b7e7ae263cc7df71bdd495486e03375d157889ae7f89f62270eff8b17129","schema_version":"1.0","event_id":"sha256:0288b7e7ae263cc7df71bdd495486e03375d157889ae7f89f62270eff8b17129"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:WOOIXRCZ73UJD5YNSIKUF6QYQS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Infrared Extinction Law at Extreme Depth in a Dark Cloud Core","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Muench, C. Lada, C. Rom\\'an-Z\\'u\\~niga, J. Alves","submitted_at":"2007-04-24T15:01:09Z","abstract_excerpt":"We combined sensitive near-infrared data obtained with ground-based imagers on the ESO NTT and VLT telescopes with space mid-infrared data acquired with the IRAC imager on the Spitzer Space Telescope to calculate the extinction law A_\\lambda/A_K as a function of \\lambda between 1.25 and 7.76 micron to an unprecedented depth in Barnard 59, a star forming, dense core located in the Pipe Nebula. The ratios A_\\lambda/A_K were calculated from the slopes of the distributions of sources in color-color diagrams \\lambda-K vs. H-K. The distributions in the color-color diagrams are fit well with single s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.3203","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":"2026-05-18T02:16:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rg0Kb2GZNK+ocSsGO7F7wQEIEhW/RVhvVU8wkAn4gLn6jBEcoc0Dxxti6vsVW3VrXOcIiaNJPbwosfoq36vaCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:59:46.669838Z"},"content_sha256":"6a206e3d846cc6327e2785a103e98b82e99cd51d1679d56f272388a7c914c7fc","schema_version":"1.0","event_id":"sha256:6a206e3d846cc6327e2785a103e98b82e99cd51d1679d56f272388a7c914c7fc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WOOIXRCZ73UJD5YNSIKUF6QYQS/bundle.json","state_url":"https://pith.science/pith/WOOIXRCZ73UJD5YNSIKUF6QYQS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WOOIXRCZ73UJD5YNSIKUF6QYQS/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":"2026-06-02T13:59:46Z","links":{"resolver":"https://pith.science/pith/WOOIXRCZ73UJD5YNSIKUF6QYQS","bundle":"https://pith.science/pith/WOOIXRCZ73UJD5YNSIKUF6QYQS/bundle.json","state":"https://pith.science/pith/WOOIXRCZ73UJD5YNSIKUF6QYQS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WOOIXRCZ73UJD5YNSIKUF6QYQS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:WOOIXRCZ73UJD5YNSIKUF6QYQS","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":"a719eb71e5fe0ea8960a7f4e91cc6eef68643b97115c17efb3c28240d9b7379c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-24T15:01:09Z","title_canon_sha256":"d174aa77915e0bce6e51728ceff99bd3ce34bb37a0453e1a3eb17744ed272cb8"},"schema_version":"1.0","source":{"id":"0704.3203","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0704.3203","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"arxiv_version","alias_value":"0704.3203v1","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0704.3203","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"pith_short_12","alias_value":"WOOIXRCZ73UJ","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"WOOIXRCZ73UJD5YN","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"WOOIXRCZ","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:6a206e3d846cc6327e2785a103e98b82e99cd51d1679d56f272388a7c914c7fc","target":"graph","created_at":"2026-05-18T02:16:31Z","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 combined sensitive near-infrared data obtained with ground-based imagers on the ESO NTT and VLT telescopes with space mid-infrared data acquired with the IRAC imager on the Spitzer Space Telescope to calculate the extinction law A_\\lambda/A_K as a function of \\lambda between 1.25 and 7.76 micron to an unprecedented depth in Barnard 59, a star forming, dense core located in the Pipe Nebula. The ratios A_\\lambda/A_K were calculated from the slopes of the distributions of sources in color-color diagrams \\lambda-K vs. H-K. The distributions in the color-color diagrams are fit well with single s","authors_text":"A. Muench, C. Lada, C. Rom\\'an-Z\\'u\\~niga, J. Alves","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-04-24T15:01:09Z","title":"The Infrared Extinction Law at Extreme Depth in a Dark Cloud Core"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.3203","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":"sha256:0288b7e7ae263cc7df71bdd495486e03375d157889ae7f89f62270eff8b17129","target":"record","created_at":"2026-05-18T02:16:31Z","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":"a719eb71e5fe0ea8960a7f4e91cc6eef68643b97115c17efb3c28240d9b7379c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-24T15:01:09Z","title_canon_sha256":"d174aa77915e0bce6e51728ceff99bd3ce34bb37a0453e1a3eb17744ed272cb8"},"schema_version":"1.0","source":{"id":"0704.3203","kind":"arxiv","version":1}},"canonical_sha256":"b39c8bc459fee891f70d921542fa1884a4b8e38794f781397b7ea1280dd33182","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b39c8bc459fee891f70d921542fa1884a4b8e38794f781397b7ea1280dd33182","first_computed_at":"2026-05-18T02:16:31.492271Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:16:31.492271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rE1mNt/N3SgqPJNzrtWsO9usKz3HnQWKwOXXGnCNTsbXt9oAQPB3HinAo2075iz4vo3bEiFNUrQn9zxcqa4EDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:16:31.492904Z","signed_message":"canonical_sha256_bytes"},"source_id":"0704.3203","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0288b7e7ae263cc7df71bdd495486e03375d157889ae7f89f62270eff8b17129","sha256:6a206e3d846cc6327e2785a103e98b82e99cd51d1679d56f272388a7c914c7fc"],"state_sha256":"e65f514bfb0499deaedc166799100bbd31a06777b0f4f477da6631d7c71f42e8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4fNAPl8GrNiNDfaiZZomD7dRwQEh059B9lNu78nddaDUcGNTPBBu63311DsQ9RUVzWJd52Le9dpgv0HmoG45BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T13:59:46.671724Z","bundle_sha256":"c96c7a140f871c6624c1ed2c57b8701b07109dab64e1e73fe738d89134c1f18e"}}