{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:2LXACNA3A74LFY3AMEUMYBD64J","short_pith_number":"pith:2LXACNA3","canonical_record":{"source":{"id":"2412.10361","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-12-13T18:55:07Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f3b2d6bd9faf1f381378cf2c573cf1602e4890a4452c07b419c6b04f14602988","abstract_canon_sha256":"1e752dd660c1c3dde657036b2c9731e56d7ed18cce38da1cd9db78ec229a04cb"},"schema_version":"1.0"},"canonical_sha256":"d2ee01341b07f8b2e3606128cc047ee271d679dfd8213d45549c74169dc75d91","source":{"kind":"arxiv","id":"2412.10361","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.10361","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"arxiv_version","alias_value":"2412.10361v2","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.10361","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"pith_short_12","alias_value":"2LXACNA3A74L","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"pith_short_16","alias_value":"2LXACNA3A74LFY3A","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"pith_short_8","alias_value":"2LXACNA3","created_at":"2026-07-05T09:49:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:2LXACNA3A74LFY3AMEUMYBD64J","target":"record","payload":{"canonical_record":{"source":{"id":"2412.10361","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-12-13T18:55:07Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f3b2d6bd9faf1f381378cf2c573cf1602e4890a4452c07b419c6b04f14602988","abstract_canon_sha256":"1e752dd660c1c3dde657036b2c9731e56d7ed18cce38da1cd9db78ec229a04cb"},"schema_version":"1.0"},"canonical_sha256":"d2ee01341b07f8b2e3606128cc047ee271d679dfd8213d45549c74169dc75d91","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:49:14.900353Z","signature_b64":"jGIFu7e2qIluM2lDR32LtF034nPj8aDwjmuUeDRv+9pc43SHYVtylqXvP9THBpcFavdzxkKaQ6GkkMWxhu02DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2ee01341b07f8b2e3606128cc047ee271d679dfd8213d45549c74169dc75d91","last_reissued_at":"2026-07-05T09:49:14.899899Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:49:14.899899Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2412.10361","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:49:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wGi5zx9O9N78h2Kk7PUoV7atjDymaqTfNfuLY8deJ1+j1RSabwEnC48qr3+NeWHmeuh7SSMUkL5ZO8ZBmDaRCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T15:14:10.197894Z"},"content_sha256":"1926747a3440831ffdaed17a0c3a9c0a6bbb5b5e7000d17cb74a43231fb2a54c","schema_version":"1.0","event_id":"sha256:1926747a3440831ffdaed17a0c3a9c0a6bbb5b5e7000d17cb74a43231fb2a54c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:2LXACNA3A74LFY3AMEUMYBD64J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Protoplanetary discs around sun-like stars appear to live longer when the metallicity is low","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Alec S. Hirschauer, Bernhard Brandl, Charles D. Keyes, Ciaran Rogers, Conor Nally, David R. Soderblom, Elena Sabbi, Giovanna Giardino, Guido De Marchi, Katia Biazzo, Katja Fahrion, Laura Lenkic, Margaret Meixner, Massimo Robberto, Nino Panagia, Nolan Habel, Olivia C. Jones, Omnarayani Nayak, Peter Zeidler, Tracy L. Beck","submitted_at":"2024-12-13T18:55:07Z","abstract_excerpt":"Previous Hubble Space Telescope (HST) observations of the star-forming cluster NGC 346 in the Small Magellanic Cloud (SMC) had revealed a large population of pre-main sequence (PMS) candidates, characterised by Halpha excess emission in their photometry. However, without access to spectroscopy, the nature of these objects remained unclear. Using the NIRSpec instrument on board JWST, we studied a sample of these stars, with masses in the range ~0.9-1.8 Msun, effective temperatures in the range 4,500-8,000 K, and PMS ages between ~0.1 and 30 Myr. Here we present the first spectra of solar-mass P"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.10361","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2412.10361/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T09:49:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N9wnyPTwJlGX6ZfW1I5zKwWDBdqmz4FfMKdj0bmjjdPJMLIGG+P3L/+3AI0CcHhbkAvYm2EqqFuKhNnfGKTnCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T15:14:10.198291Z"},"content_sha256":"9252e2df60bd55373206ac39395cca031e6cc967bbe34e3a861d6848277eb7e1","schema_version":"1.0","event_id":"sha256:9252e2df60bd55373206ac39395cca031e6cc967bbe34e3a861d6848277eb7e1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2LXACNA3A74LFY3AMEUMYBD64J/bundle.json","state_url":"https://pith.science/pith/2LXACNA3A74LFY3AMEUMYBD64J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2LXACNA3A74LFY3AMEUMYBD64J/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":"2026-07-07T15:14:10Z","links":{"resolver":"https://pith.science/pith/2LXACNA3A74LFY3AMEUMYBD64J","bundle":"https://pith.science/pith/2LXACNA3A74LFY3AMEUMYBD64J/bundle.json","state":"https://pith.science/pith/2LXACNA3A74LFY3AMEUMYBD64J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2LXACNA3A74LFY3AMEUMYBD64J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:2LXACNA3A74LFY3AMEUMYBD64J","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":"1e752dd660c1c3dde657036b2c9731e56d7ed18cce38da1cd9db78ec229a04cb","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-12-13T18:55:07Z","title_canon_sha256":"f3b2d6bd9faf1f381378cf2c573cf1602e4890a4452c07b419c6b04f14602988"},"schema_version":"1.0","source":{"id":"2412.10361","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.10361","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"arxiv_version","alias_value":"2412.10361v2","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.10361","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"pith_short_12","alias_value":"2LXACNA3A74L","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"pith_short_16","alias_value":"2LXACNA3A74LFY3A","created_at":"2026-07-05T09:49:14Z"},{"alias_kind":"pith_short_8","alias_value":"2LXACNA3","created_at":"2026-07-05T09:49:14Z"}],"graph_snapshots":[{"event_id":"sha256:9252e2df60bd55373206ac39395cca031e6cc967bbe34e3a861d6848277eb7e1","target":"graph","created_at":"2026-07-05T09:49:14Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2412.10361/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Previous Hubble Space Telescope (HST) observations of the star-forming cluster NGC 346 in the Small Magellanic Cloud (SMC) had revealed a large population of pre-main sequence (PMS) candidates, characterised by Halpha excess emission in their photometry. However, without access to spectroscopy, the nature of these objects remained unclear. Using the NIRSpec instrument on board JWST, we studied a sample of these stars, with masses in the range ~0.9-1.8 Msun, effective temperatures in the range 4,500-8,000 K, and PMS ages between ~0.1 and 30 Myr. Here we present the first spectra of solar-mass P","authors_text":"Alec S. Hirschauer, Bernhard Brandl, Charles D. Keyes, Ciaran Rogers, Conor Nally, David R. Soderblom, Elena Sabbi, Giovanna Giardino, Guido De Marchi, Katia Biazzo, Katja Fahrion, Laura Lenkic, Margaret Meixner, Massimo Robberto, Nino Panagia, Nolan Habel, Olivia C. Jones, Omnarayani Nayak, Peter Zeidler, Tracy L. Beck","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-12-13T18:55:07Z","title":"Protoplanetary discs around sun-like stars appear to live longer when the metallicity is low"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.10361","kind":"arxiv","version":2},"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":"sha256:1926747a3440831ffdaed17a0c3a9c0a6bbb5b5e7000d17cb74a43231fb2a54c","target":"record","created_at":"2026-07-05T09:49:14Z","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":"1e752dd660c1c3dde657036b2c9731e56d7ed18cce38da1cd9db78ec229a04cb","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-12-13T18:55:07Z","title_canon_sha256":"f3b2d6bd9faf1f381378cf2c573cf1602e4890a4452c07b419c6b04f14602988"},"schema_version":"1.0","source":{"id":"2412.10361","kind":"arxiv","version":2}},"canonical_sha256":"d2ee01341b07f8b2e3606128cc047ee271d679dfd8213d45549c74169dc75d91","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2ee01341b07f8b2e3606128cc047ee271d679dfd8213d45549c74169dc75d91","first_computed_at":"2026-07-05T09:49:14.899899Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:49:14.899899Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jGIFu7e2qIluM2lDR32LtF034nPj8aDwjmuUeDRv+9pc43SHYVtylqXvP9THBpcFavdzxkKaQ6GkkMWxhu02DA==","signature_status":"signed_v1","signed_at":"2026-07-05T09:49:14.900353Z","signed_message":"canonical_sha256_bytes"},"source_id":"2412.10361","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1926747a3440831ffdaed17a0c3a9c0a6bbb5b5e7000d17cb74a43231fb2a54c","sha256:9252e2df60bd55373206ac39395cca031e6cc967bbe34e3a861d6848277eb7e1"],"state_sha256":"9d375d1c99d833e2cb53cca746eb05f759d6dc825e778eae5fa9c4db47fd8c94"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"saLVbFaoDuqh8tRNJ/pppwzwQJOi0PgEIruUwhaJHY8AAbTGzJxYJSq2pAinXVeB3uFDdFa/yoqY/8+M2hdqBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T15:14:10.200538Z","bundle_sha256":"f995232c8493972d2ee8269df3690a00d345af67b9343b726c331b8e53fe53f0"}}