{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:B5ITKMNBFHKTYTW2ZEGOOQT2FY","short_pith_number":"pith:B5ITKMNB","canonical_record":{"source":{"id":"0706.0563","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-04T23:55:50Z","cross_cats_sorted":[],"title_canon_sha256":"58dd911b97ce5674ba599427f37924afe341298762abcc0a3cef974b6b9561ce","abstract_canon_sha256":"1d9325e196f4cb16592ae4ce78b4253df968d358204d6eab39328de05e334a3e"},"schema_version":"1.0"},"canonical_sha256":"0f513531a129d53c4edac90ce7427a2e124fcfef65a90fb966ef291a165157d9","source":{"kind":"arxiv","id":"0706.0563","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.0563","created_at":"2026-05-18T03:48:12Z"},{"alias_kind":"arxiv_version","alias_value":"0706.0563v1","created_at":"2026-05-18T03:48:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.0563","created_at":"2026-05-18T03:48:12Z"},{"alias_kind":"pith_short_12","alias_value":"B5ITKMNBFHKT","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"B5ITKMNBFHKTYTW2","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"B5ITKMNB","created_at":"2026-05-18T12:25:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:B5ITKMNBFHKTYTW2ZEGOOQT2FY","target":"record","payload":{"canonical_record":{"source":{"id":"0706.0563","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-04T23:55:50Z","cross_cats_sorted":[],"title_canon_sha256":"58dd911b97ce5674ba599427f37924afe341298762abcc0a3cef974b6b9561ce","abstract_canon_sha256":"1d9325e196f4cb16592ae4ce78b4253df968d358204d6eab39328de05e334a3e"},"schema_version":"1.0"},"canonical_sha256":"0f513531a129d53c4edac90ce7427a2e124fcfef65a90fb966ef291a165157d9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:48:12.351853Z","signature_b64":"MNgDb3Er3U4UYsjORuTG/CAamkqtXXAll2Ct93X2gV6s/Ik8hK2fuRO2c5ohHtxLSOkMmNAo0x4TTPpAIosKDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0f513531a129d53c4edac90ce7427a2e124fcfef65a90fb966ef291a165157d9","last_reissued_at":"2026-05-18T03:48:12.351132Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:48:12.351132Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0706.0563","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":"2026-05-18T03:48:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t+8K1RLQ+dBjON+gfcYry+5rq9H3GHseKMhUcjWU++opvl71AOOQHAAm2srNSUwwHf5kqR9dh0d03A/doBzNDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:26:43.750951Z"},"content_sha256":"33c3d430ad7f6ac72382e44d1bdf4fa4e4508ffb7214cebb6b73e9d3523419b4","schema_version":"1.0","event_id":"sha256:33c3d430ad7f6ac72382e44d1bdf4fa4e4508ffb7214cebb6b73e9d3523419b4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:B5ITKMNBFHKTYTW2ZEGOOQT2FY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Spitzer c2d Survey of Weak-line T Tauri Stars II: New Constraints on the Timescale for Planet Building","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Anneila Sargent, Bruno Merin, David Koerner, Deborah L. Padgett, Ewine F. van Dishoeck, Geoffrey Blake, II, Jean-Charles Augereau, Karl R. Stapelfeldt, Lee Mundy, Lori Allen, Lucas Cieza, Neal J. Evans, Nicholas Chapman, Paul Harvey, Philip C. Myers, Shih-Ping Lai, Timothy Brooke, Tracy Huard, William Spiesman, Zahed Wahhaj","submitted_at":"2007-06-04T23:55:50Z","abstract_excerpt":"One of the central goals of the Spitzer Legacy Project ``From Molecular Cores to Planet-forming Disks'' (c2d) is to determine the frequency of remnant circumstellar disks around weak-line T Tauri stars (wTTs) and to study the properties and evolutionary status of these disks. Here we present a census of disks for a sample of over 230 spectroscopically identified wTTs located in the c2d IRAC (3.6, 4.5, 4.8, and 8.0 um) and MIPS (24 um) maps of the Ophiuchus, Lupus, and Perseus Molecular Clouds. We find that ~20% of the wTTs in a magnitude limited subsample have noticeable IR-excesses at IRAC wa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.0563","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":"2026-05-18T03:48:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L828fi1OZqy4QChiQWZyLDqRjIl+oGbwrEpBTiPVeBSqhvtjmp4s/Atk0jALVZTVNM6xGduDEWqLEVu7hY8zBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:26:43.751609Z"},"content_sha256":"30c573071404def950a2386ad03142da1c2a3661ce01ac2f02c67575e8cad1d6","schema_version":"1.0","event_id":"sha256:30c573071404def950a2386ad03142da1c2a3661ce01ac2f02c67575e8cad1d6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B5ITKMNBFHKTYTW2ZEGOOQT2FY/bundle.json","state_url":"https://pith.science/pith/B5ITKMNBFHKTYTW2ZEGOOQT2FY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B5ITKMNBFHKTYTW2ZEGOOQT2FY/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":"2026-05-25T20:26:43Z","links":{"resolver":"https://pith.science/pith/B5ITKMNBFHKTYTW2ZEGOOQT2FY","bundle":"https://pith.science/pith/B5ITKMNBFHKTYTW2ZEGOOQT2FY/bundle.json","state":"https://pith.science/pith/B5ITKMNBFHKTYTW2ZEGOOQT2FY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B5ITKMNBFHKTYTW2ZEGOOQT2FY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:B5ITKMNBFHKTYTW2ZEGOOQT2FY","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":"1d9325e196f4cb16592ae4ce78b4253df968d358204d6eab39328de05e334a3e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-04T23:55:50Z","title_canon_sha256":"58dd911b97ce5674ba599427f37924afe341298762abcc0a3cef974b6b9561ce"},"schema_version":"1.0","source":{"id":"0706.0563","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.0563","created_at":"2026-05-18T03:48:12Z"},{"alias_kind":"arxiv_version","alias_value":"0706.0563v1","created_at":"2026-05-18T03:48:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.0563","created_at":"2026-05-18T03:48:12Z"},{"alias_kind":"pith_short_12","alias_value":"B5ITKMNBFHKT","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"B5ITKMNBFHKTYTW2","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"B5ITKMNB","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:30c573071404def950a2386ad03142da1c2a3661ce01ac2f02c67575e8cad1d6","target":"graph","created_at":"2026-05-18T03:48:12Z","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":"One of the central goals of the Spitzer Legacy Project ``From Molecular Cores to Planet-forming Disks'' (c2d) is to determine the frequency of remnant circumstellar disks around weak-line T Tauri stars (wTTs) and to study the properties and evolutionary status of these disks. Here we present a census of disks for a sample of over 230 spectroscopically identified wTTs located in the c2d IRAC (3.6, 4.5, 4.8, and 8.0 um) and MIPS (24 um) maps of the Ophiuchus, Lupus, and Perseus Molecular Clouds. We find that ~20% of the wTTs in a magnitude limited subsample have noticeable IR-excesses at IRAC wa","authors_text":"Anneila Sargent, Bruno Merin, David Koerner, Deborah L. Padgett, Ewine F. van Dishoeck, Geoffrey Blake, II, Jean-Charles Augereau, Karl R. Stapelfeldt, Lee Mundy, Lori Allen, Lucas Cieza, Neal J. Evans, Nicholas Chapman, Paul Harvey, Philip C. Myers, Shih-Ping Lai, Timothy Brooke, Tracy Huard, William Spiesman, Zahed Wahhaj","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-06-04T23:55:50Z","title":"The Spitzer c2d Survey of Weak-line T Tauri Stars II: New Constraints on the Timescale for Planet Building"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.0563","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":"sha256:33c3d430ad7f6ac72382e44d1bdf4fa4e4508ffb7214cebb6b73e9d3523419b4","target":"record","created_at":"2026-05-18T03:48:12Z","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":"1d9325e196f4cb16592ae4ce78b4253df968d358204d6eab39328de05e334a3e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-04T23:55:50Z","title_canon_sha256":"58dd911b97ce5674ba599427f37924afe341298762abcc0a3cef974b6b9561ce"},"schema_version":"1.0","source":{"id":"0706.0563","kind":"arxiv","version":1}},"canonical_sha256":"0f513531a129d53c4edac90ce7427a2e124fcfef65a90fb966ef291a165157d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f513531a129d53c4edac90ce7427a2e124fcfef65a90fb966ef291a165157d9","first_computed_at":"2026-05-18T03:48:12.351132Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:48:12.351132Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MNgDb3Er3U4UYsjORuTG/CAamkqtXXAll2Ct93X2gV6s/Ik8hK2fuRO2c5ohHtxLSOkMmNAo0x4TTPpAIosKDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:48:12.351853Z","signed_message":"canonical_sha256_bytes"},"source_id":"0706.0563","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:33c3d430ad7f6ac72382e44d1bdf4fa4e4508ffb7214cebb6b73e9d3523419b4","sha256:30c573071404def950a2386ad03142da1c2a3661ce01ac2f02c67575e8cad1d6"],"state_sha256":"cca84bae37014212abc8d3b7757fd15a155d47e13b3cb087932a65320f341cfd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"US3G5DMTbEsH/CKYkArlmDvZ9kxgruj5itodq7Ge+WKoxQmWQgd5Uq5rOm2DzF+ifNmrHUbPb835IWhOb88LDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:26:43.755155Z","bundle_sha256":"1b7caa2be0b916b1cd5b02bbf15abbf6a086697b91c8fc450aaabb433dc8ab2f"}}