{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:SUO3WADORMS4WE5JY2OYPFC662","short_pith_number":"pith:SUO3WADO","canonical_record":{"source":{"id":"0906.3365","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-18T07:46:50Z","cross_cats_sorted":[],"title_canon_sha256":"339d8c743cd214061184ab3258b93e7b1e97b6b5ca2af9a3a26a60d9dd1b92e9","abstract_canon_sha256":"865d51b447e6527fc52f253f217274d5c74df67ef3037879aadd8e6262044200"},"schema_version":"1.0"},"canonical_sha256":"951dbb006e8b25cb13a9c69d87945ef6b76e04308d437a5e0a8af762ad2a0fef","source":{"kind":"arxiv","id":"0906.3365","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.3365","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"arxiv_version","alias_value":"0906.3365v1","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.3365","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"pith_short_12","alias_value":"SUO3WADORMS4","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"SUO3WADORMS4WE5J","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"SUO3WADO","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:SUO3WADORMS4WE5JY2OYPFC662","target":"record","payload":{"canonical_record":{"source":{"id":"0906.3365","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-18T07:46:50Z","cross_cats_sorted":[],"title_canon_sha256":"339d8c743cd214061184ab3258b93e7b1e97b6b5ca2af9a3a26a60d9dd1b92e9","abstract_canon_sha256":"865d51b447e6527fc52f253f217274d5c74df67ef3037879aadd8e6262044200"},"schema_version":"1.0"},"canonical_sha256":"951dbb006e8b25cb13a9c69d87945ef6b76e04308d437a5e0a8af762ad2a0fef","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:42.694763Z","signature_b64":"ZyHsGjltnlRH/ucO3l1Lv8ANunCwAjs1qZao/Lwb4XxOoUiz6YNbpxiYk9oeZ0NAEfOf3A6fYrmcMlUpZCRaBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"951dbb006e8b25cb13a9c69d87945ef6b76e04308d437a5e0a8af762ad2a0fef","last_reissued_at":"2026-05-18T04:29:42.694208Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:42.694208Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.3365","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":"2026-05-18T04:29:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K04MqONRlVFqDeG/48hSMTdIb3ZaOca46jA4jPZXYyi6xLoXyWm830HmAFRWqLFatvySrPBPg1WpJeFZIWtNBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T04:09:52.488535Z"},"content_sha256":"607d3b17e5ab6190495c033ccc9c317cb2150dd329d558f1e4eb1c8e474e31f0","schema_version":"1.0","event_id":"sha256:607d3b17e5ab6190495c033ccc9c317cb2150dd329d558f1e4eb1c8e474e31f0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:SUO3WADORMS4WE5JY2OYPFC662","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Long-Lived Disks in the Eta Chamaeleontis Cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A.G.G.M. Tielens, A. Juhasz, A. Sicilia-Aguilar, B. Acke, E.D. Feigelson, G. Meeus, J. Bouwman, L. Decin, Th. Henning, V. Roccatagliata, W.A. Lawson","submitted_at":"2009-06-18T07:46:50Z","abstract_excerpt":"We present IRS spectra and revised MIPS photometry for the 18 members of the Eta Chamaeleontis cluster. Aged 8 Myr, the Eta Cha cluster is one of the few nearby regions within the 5-10 Myr age range, during which the disk fraction decreases dramatically and giant planet formation must come to an end. For the 15 low-mass members, we measure a disk fraction ~50%, high for their 8 Myr age, and 4 of the 8 disks lack near-IR excesses, consistent with the empirical definition of \"transition'' disks. Most of the disks are comparable to geometrically flat disks. The comparison with regions of differen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.3365","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":"2026-05-18T04:29:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4a4oYpzr0TkDfE3ao+cLLJX4bZ1FwpgX98R325zVYzzkDY/bt6vKCJoo0Ovih1RciuumcOcQzRdVabGwh3UmCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T04:09:52.488930Z"},"content_sha256":"44d7e65749fa48fc853242055a66253ebe9c337b505878ea1187f946bba9966d","schema_version":"1.0","event_id":"sha256:44d7e65749fa48fc853242055a66253ebe9c337b505878ea1187f946bba9966d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SUO3WADORMS4WE5JY2OYPFC662/bundle.json","state_url":"https://pith.science/pith/SUO3WADORMS4WE5JY2OYPFC662/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SUO3WADORMS4WE5JY2OYPFC662/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":"2026-08-02T04:09:52Z","links":{"resolver":"https://pith.science/pith/SUO3WADORMS4WE5JY2OYPFC662","bundle":"https://pith.science/pith/SUO3WADORMS4WE5JY2OYPFC662/bundle.json","state":"https://pith.science/pith/SUO3WADORMS4WE5JY2OYPFC662/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SUO3WADORMS4WE5JY2OYPFC662/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:SUO3WADORMS4WE5JY2OYPFC662","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":"865d51b447e6527fc52f253f217274d5c74df67ef3037879aadd8e6262044200","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-18T07:46:50Z","title_canon_sha256":"339d8c743cd214061184ab3258b93e7b1e97b6b5ca2af9a3a26a60d9dd1b92e9"},"schema_version":"1.0","source":{"id":"0906.3365","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.3365","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"arxiv_version","alias_value":"0906.3365v1","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.3365","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"pith_short_12","alias_value":"SUO3WADORMS4","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"SUO3WADORMS4WE5J","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"SUO3WADO","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:44d7e65749fa48fc853242055a66253ebe9c337b505878ea1187f946bba9966d","target":"graph","created_at":"2026-05-18T04:29:42Z","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 IRS spectra and revised MIPS photometry for the 18 members of the Eta Chamaeleontis cluster. Aged 8 Myr, the Eta Cha cluster is one of the few nearby regions within the 5-10 Myr age range, during which the disk fraction decreases dramatically and giant planet formation must come to an end. For the 15 low-mass members, we measure a disk fraction ~50%, high for their 8 Myr age, and 4 of the 8 disks lack near-IR excesses, consistent with the empirical definition of \"transition'' disks. Most of the disks are comparable to geometrically flat disks. The comparison with regions of differen","authors_text":"A.G.G.M. Tielens, A. Juhasz, A. Sicilia-Aguilar, B. Acke, E.D. Feigelson, G. Meeus, J. Bouwman, L. Decin, Th. Henning, V. Roccatagliata, W.A. Lawson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-18T07:46:50Z","title":"The Long-Lived Disks in the Eta Chamaeleontis Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.3365","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":"sha256:607d3b17e5ab6190495c033ccc9c317cb2150dd329d558f1e4eb1c8e474e31f0","target":"record","created_at":"2026-05-18T04:29:42Z","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":"865d51b447e6527fc52f253f217274d5c74df67ef3037879aadd8e6262044200","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-18T07:46:50Z","title_canon_sha256":"339d8c743cd214061184ab3258b93e7b1e97b6b5ca2af9a3a26a60d9dd1b92e9"},"schema_version":"1.0","source":{"id":"0906.3365","kind":"arxiv","version":1}},"canonical_sha256":"951dbb006e8b25cb13a9c69d87945ef6b76e04308d437a5e0a8af762ad2a0fef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"951dbb006e8b25cb13a9c69d87945ef6b76e04308d437a5e0a8af762ad2a0fef","first_computed_at":"2026-05-18T04:29:42.694208Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:42.694208Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZyHsGjltnlRH/ucO3l1Lv8ANunCwAjs1qZao/Lwb4XxOoUiz6YNbpxiYk9oeZ0NAEfOf3A6fYrmcMlUpZCRaBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:42.694763Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.3365","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:607d3b17e5ab6190495c033ccc9c317cb2150dd329d558f1e4eb1c8e474e31f0","sha256:44d7e65749fa48fc853242055a66253ebe9c337b505878ea1187f946bba9966d"],"state_sha256":"73e106e5dcb9876dd9b7eaa0a7d8d88f269377c2565cc2d1dd354e3882cf0db4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SowjHQNclRmj3RcEdLEkxmbT3RfFpx7wpb2Dg+A4t+JHX5w4uDadWu+JbRzmT5YhVPJD2qiOJVF5wkGtnrS5CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-02T04:09:52.491206Z","bundle_sha256":"94d89965fade19205263c0d42a60740492c218c889989c5dc56e16b943114590"}}