{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:CSH37NNPGFIXGPJCBDHU2CGMOJ","short_pith_number":"pith:CSH37NNP","canonical_record":{"source":{"id":"1609.09100","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-09-28T20:13:36Z","cross_cats_sorted":[],"title_canon_sha256":"948ba12767510cf0f2752b42036ceb8fdb7ac553258f56de0bef28497438b5e8","abstract_canon_sha256":"d2ad94e4c4492caeedbec15dece4dad34ba770be09d6d77a9be4461c6868bef9"},"schema_version":"1.0"},"canonical_sha256":"148fbfb5af3151733d2208cf4d08cc726bdc0dfa3697036fa17c215b6ced228b","source":{"kind":"arxiv","id":"1609.09100","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.09100","created_at":"2026-05-18T00:55:07Z"},{"alias_kind":"arxiv_version","alias_value":"1609.09100v1","created_at":"2026-05-18T00:55:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.09100","created_at":"2026-05-18T00:55:07Z"},{"alias_kind":"pith_short_12","alias_value":"CSH37NNPGFIX","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CSH37NNPGFIXGPJC","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CSH37NNP","created_at":"2026-05-18T12:30:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:CSH37NNPGFIXGPJCBDHU2CGMOJ","target":"record","payload":{"canonical_record":{"source":{"id":"1609.09100","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-09-28T20:13:36Z","cross_cats_sorted":[],"title_canon_sha256":"948ba12767510cf0f2752b42036ceb8fdb7ac553258f56de0bef28497438b5e8","abstract_canon_sha256":"d2ad94e4c4492caeedbec15dece4dad34ba770be09d6d77a9be4461c6868bef9"},"schema_version":"1.0"},"canonical_sha256":"148fbfb5af3151733d2208cf4d08cc726bdc0dfa3697036fa17c215b6ced228b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:55:07.585771Z","signature_b64":"Gxj0Wjka5xmWKPoiaajNVu4CcuGf6L75V6ur44Zawy+MC1kiObyfeih5ykn8GLoi3swYw0Pfg7ppqdR5AEsTBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"148fbfb5af3151733d2208cf4d08cc726bdc0dfa3697036fa17c215b6ced228b","last_reissued_at":"2026-05-18T00:55:07.585171Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:55:07.585171Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.09100","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":"2026-05-18T00:55:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1IC8lPDh11KLU+dYd/m8DXw+ZUOIQBqM/heW1h4f/6ZfslmlJvjIol2Zd4YOo/XKTosR3/qGn9fHQ1lUcwQ1DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T10:09:27.670696Z"},"content_sha256":"e956c36dc8c751d048e04b4d00835a38fd43faf69e14f69595d6293dece7039e","schema_version":"1.0","event_id":"sha256:e956c36dc8c751d048e04b4d00835a38fd43faf69e14f69595d6293dece7039e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:CSH37NNPGFIXGPJCBDHU2CGMOJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spitzer Observations of Long Term Infrared Variability Among Young Stellar Objects in Chamaeleon I","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Elise Furlan, James Muzerolle, Kevin M. Flaherty, Lindsay DeMarchi, Robert Gutermuth, S. Thomas Megeath, William Herbst, Zoltan Balog","submitted_at":"2016-09-28T20:13:36Z","abstract_excerpt":"Infrared variability is common among young stellar objects, with surveys finding daily to weekly fluctuations of a few tenths of a magnitude. Space-based observations can produce highly sampled infrared light curves, but are often limited to total baselines of about a month due to the orientation of the spacecraft. Here we present observations of the Chameleon I cluster whose low declination makes it observable by the Spitzer space telescope over a 200 day period. We observe 30 young stellar objects with a daily cadence to better sample variability on timescales of months. We find such variabi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.09100","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":"2026-05-18T00:55:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OnEJwrHUyd9MZ/IG2lfa1ApCbChu2Amnw7o0TkjKGoeREKfpVXNeYK7yT7DK5D94pAuGWMYIoxpDwpWUL0hPBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T10:09:27.671407Z"},"content_sha256":"7f4937d5b9cf06aa2018783ae89bf8213907f213c6742333db68894eefbc731e","schema_version":"1.0","event_id":"sha256:7f4937d5b9cf06aa2018783ae89bf8213907f213c6742333db68894eefbc731e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CSH37NNPGFIXGPJCBDHU2CGMOJ/bundle.json","state_url":"https://pith.science/pith/CSH37NNPGFIXGPJCBDHU2CGMOJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CSH37NNPGFIXGPJCBDHU2CGMOJ/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":"2026-06-10T10:09:27Z","links":{"resolver":"https://pith.science/pith/CSH37NNPGFIXGPJCBDHU2CGMOJ","bundle":"https://pith.science/pith/CSH37NNPGFIXGPJCBDHU2CGMOJ/bundle.json","state":"https://pith.science/pith/CSH37NNPGFIXGPJCBDHU2CGMOJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CSH37NNPGFIXGPJCBDHU2CGMOJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:CSH37NNPGFIXGPJCBDHU2CGMOJ","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":"d2ad94e4c4492caeedbec15dece4dad34ba770be09d6d77a9be4461c6868bef9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-09-28T20:13:36Z","title_canon_sha256":"948ba12767510cf0f2752b42036ceb8fdb7ac553258f56de0bef28497438b5e8"},"schema_version":"1.0","source":{"id":"1609.09100","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.09100","created_at":"2026-05-18T00:55:07Z"},{"alias_kind":"arxiv_version","alias_value":"1609.09100v1","created_at":"2026-05-18T00:55:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.09100","created_at":"2026-05-18T00:55:07Z"},{"alias_kind":"pith_short_12","alias_value":"CSH37NNPGFIX","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CSH37NNPGFIXGPJC","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CSH37NNP","created_at":"2026-05-18T12:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:7f4937d5b9cf06aa2018783ae89bf8213907f213c6742333db68894eefbc731e","target":"graph","created_at":"2026-05-18T00:55:07Z","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":"Infrared variability is common among young stellar objects, with surveys finding daily to weekly fluctuations of a few tenths of a magnitude. Space-based observations can produce highly sampled infrared light curves, but are often limited to total baselines of about a month due to the orientation of the spacecraft. Here we present observations of the Chameleon I cluster whose low declination makes it observable by the Spitzer space telescope over a 200 day period. We observe 30 young stellar objects with a daily cadence to better sample variability on timescales of months. We find such variabi","authors_text":"Elise Furlan, James Muzerolle, Kevin M. Flaherty, Lindsay DeMarchi, Robert Gutermuth, S. Thomas Megeath, William Herbst, Zoltan Balog","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-09-28T20:13:36Z","title":"Spitzer Observations of Long Term Infrared Variability Among Young Stellar Objects in Chamaeleon I"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.09100","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:e956c36dc8c751d048e04b4d00835a38fd43faf69e14f69595d6293dece7039e","target":"record","created_at":"2026-05-18T00:55:07Z","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":"d2ad94e4c4492caeedbec15dece4dad34ba770be09d6d77a9be4461c6868bef9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-09-28T20:13:36Z","title_canon_sha256":"948ba12767510cf0f2752b42036ceb8fdb7ac553258f56de0bef28497438b5e8"},"schema_version":"1.0","source":{"id":"1609.09100","kind":"arxiv","version":1}},"canonical_sha256":"148fbfb5af3151733d2208cf4d08cc726bdc0dfa3697036fa17c215b6ced228b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"148fbfb5af3151733d2208cf4d08cc726bdc0dfa3697036fa17c215b6ced228b","first_computed_at":"2026-05-18T00:55:07.585171Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:55:07.585171Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gxj0Wjka5xmWKPoiaajNVu4CcuGf6L75V6ur44Zawy+MC1kiObyfeih5ykn8GLoi3swYw0Pfg7ppqdR5AEsTBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:55:07.585771Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.09100","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e956c36dc8c751d048e04b4d00835a38fd43faf69e14f69595d6293dece7039e","sha256:7f4937d5b9cf06aa2018783ae89bf8213907f213c6742333db68894eefbc731e"],"state_sha256":"475f606afdfa7cbb7fc9c097c1a72f66995742e1bec120ebbd3906b07364ab6c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/X7E4CqBsjov77C0r66J46FDe6By4rlYj/sNjaS3uxoPS0+DqMY1EayzMPefpU7MG62rLPAMeaK4RcviQItXCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T10:09:27.675132Z","bundle_sha256":"998548f6eb5650e6c4f63725156139f0c84a55ee4f4d6ed2cc1945fa9ad458da"}}