{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:KFCWKYNQWONCYC36XSNNSBW4DW","short_pith_number":"pith:KFCWKYNQ","canonical_record":{"source":{"id":"2606.04368","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-03T02:33:05Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"b968c5c9113a28ddebedca2a3987cfaa900d347371d21e4ccb784b873e078842","abstract_canon_sha256":"0b095b979e79a9cc006b2a6c233c535d6647478b307fb901b4a06b1a68fab984"},"schema_version":"1.0"},"canonical_sha256":"51456561b0b39a2c0b7ebc9ad906dc1dbc9998c36fb922ff9e6e7a236cee70d6","source":{"kind":"arxiv","id":"2606.04368","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.04368","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"arxiv_version","alias_value":"2606.04368v1","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.04368","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"pith_short_12","alias_value":"KFCWKYNQWONC","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"pith_short_16","alias_value":"KFCWKYNQWONCYC36","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"pith_short_8","alias_value":"KFCWKYNQ","created_at":"2026-06-04T01:09:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:KFCWKYNQWONCYC36XSNNSBW4DW","target":"record","payload":{"canonical_record":{"source":{"id":"2606.04368","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-03T02:33:05Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"b968c5c9113a28ddebedca2a3987cfaa900d347371d21e4ccb784b873e078842","abstract_canon_sha256":"0b095b979e79a9cc006b2a6c233c535d6647478b307fb901b4a06b1a68fab984"},"schema_version":"1.0"},"canonical_sha256":"51456561b0b39a2c0b7ebc9ad906dc1dbc9998c36fb922ff9e6e7a236cee70d6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-04T01:09:05.524119Z","signature_b64":"kYFJOufcZ5/az+/Fb6UWjOrkzSDqmuNyc2TqY/R6Ay+a96TDnZI6/tK40lb9r9p1A1z7M0+7XsssEulA9FGgAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"51456561b0b39a2c0b7ebc9ad906dc1dbc9998c36fb922ff9e6e7a236cee70d6","last_reissued_at":"2026-06-04T01:09:05.523623Z","signature_status":"signed_v1","first_computed_at":"2026-06-04T01:09:05.523623Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.04368","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":"2026-06-04T01:09:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nkOOhDTpNx1WS8e8e8IcBI+g7ZGMTT173ZdmGddn6KB7qLkryBwETwvod6kea4+DUjdYb6pfsQ1hdSMvd5jmAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T02:20:42.443041Z"},"content_sha256":"720c34858a86117f359c56d2fcc19ab4652c6caf4503709b2318a4ef14416d37","schema_version":"1.0","event_id":"sha256:720c34858a86117f359c56d2fcc19ab4652c6caf4503709b2318a4ef14416d37"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:KFCWKYNQWONCYC36XSNNSBW4DW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Planetary Nebula from a 5.7 $M_{\\odot}$ Progenitor in a 90 Myr M31 Star Cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Bingqiu Chen, Haibo Yuan, Pinjian Chen, Shu Wang, Xiaodian Chen","submitted_at":"2026-06-03T02:33:05Z","abstract_excerpt":"Planetary nebulae (PNe) trace the late evolution of low-to-intermediate-mass stars, yet the masses of their progenitors are rarely measured directly. Here we present a PN physically associated with a young star cluster in M31, providing an unprecedented extragalactic empirical anchor in the poorly constrained high-mass regime of PN progenitors. High-resolution Hubble Space Telescope imaging shows that the nebula lies near the cluster center, and spectral decomposition of the blended cluster-plus-nebula spectrum yields consistent stellar and nebular radial velocities, strongly supporting a phys"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.04368","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.04368/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":"2026-06-04T01:09:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6HK1h1mEtIXxZpvuVG1AHNdFJ4zwVmkh37KXnaljgISOx48GsEWBD7BuWSW3mAl1ShapzBZ5p19OcTdokr7DBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T02:20:42.443428Z"},"content_sha256":"03cfd60f457ef51d72cdd5e6d8d97c042814d5eaeef30950cd8e291ae1925181","schema_version":"1.0","event_id":"sha256:03cfd60f457ef51d72cdd5e6d8d97c042814d5eaeef30950cd8e291ae1925181"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KFCWKYNQWONCYC36XSNNSBW4DW/bundle.json","state_url":"https://pith.science/pith/KFCWKYNQWONCYC36XSNNSBW4DW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KFCWKYNQWONCYC36XSNNSBW4DW/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":"2026-06-29T02:20:42Z","links":{"resolver":"https://pith.science/pith/KFCWKYNQWONCYC36XSNNSBW4DW","bundle":"https://pith.science/pith/KFCWKYNQWONCYC36XSNNSBW4DW/bundle.json","state":"https://pith.science/pith/KFCWKYNQWONCYC36XSNNSBW4DW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KFCWKYNQWONCYC36XSNNSBW4DW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:KFCWKYNQWONCYC36XSNNSBW4DW","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":"0b095b979e79a9cc006b2a6c233c535d6647478b307fb901b4a06b1a68fab984","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-03T02:33:05Z","title_canon_sha256":"b968c5c9113a28ddebedca2a3987cfaa900d347371d21e4ccb784b873e078842"},"schema_version":"1.0","source":{"id":"2606.04368","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.04368","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"arxiv_version","alias_value":"2606.04368v1","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.04368","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"pith_short_12","alias_value":"KFCWKYNQWONC","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"pith_short_16","alias_value":"KFCWKYNQWONCYC36","created_at":"2026-06-04T01:09:05Z"},{"alias_kind":"pith_short_8","alias_value":"KFCWKYNQ","created_at":"2026-06-04T01:09:05Z"}],"graph_snapshots":[{"event_id":"sha256:03cfd60f457ef51d72cdd5e6d8d97c042814d5eaeef30950cd8e291ae1925181","target":"graph","created_at":"2026-06-04T01:09:05Z","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/2606.04368/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Planetary nebulae (PNe) trace the late evolution of low-to-intermediate-mass stars, yet the masses of their progenitors are rarely measured directly. Here we present a PN physically associated with a young star cluster in M31, providing an unprecedented extragalactic empirical anchor in the poorly constrained high-mass regime of PN progenitors. High-resolution Hubble Space Telescope imaging shows that the nebula lies near the cluster center, and spectral decomposition of the blended cluster-plus-nebula spectrum yields consistent stellar and nebular radial velocities, strongly supporting a phys","authors_text":"Bingqiu Chen, Haibo Yuan, Pinjian Chen, Shu Wang, Xiaodian Chen","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-03T02:33:05Z","title":"A Planetary Nebula from a 5.7 $M_{\\odot}$ Progenitor in a 90 Myr M31 Star Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.04368","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":"sha256:720c34858a86117f359c56d2fcc19ab4652c6caf4503709b2318a4ef14416d37","target":"record","created_at":"2026-06-04T01:09:05Z","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":"0b095b979e79a9cc006b2a6c233c535d6647478b307fb901b4a06b1a68fab984","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-03T02:33:05Z","title_canon_sha256":"b968c5c9113a28ddebedca2a3987cfaa900d347371d21e4ccb784b873e078842"},"schema_version":"1.0","source":{"id":"2606.04368","kind":"arxiv","version":1}},"canonical_sha256":"51456561b0b39a2c0b7ebc9ad906dc1dbc9998c36fb922ff9e6e7a236cee70d6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"51456561b0b39a2c0b7ebc9ad906dc1dbc9998c36fb922ff9e6e7a236cee70d6","first_computed_at":"2026-06-04T01:09:05.523623Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-04T01:09:05.523623Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kYFJOufcZ5/az+/Fb6UWjOrkzSDqmuNyc2TqY/R6Ay+a96TDnZI6/tK40lb9r9p1A1z7M0+7XsssEulA9FGgAw==","signature_status":"signed_v1","signed_at":"2026-06-04T01:09:05.524119Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.04368","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:720c34858a86117f359c56d2fcc19ab4652c6caf4503709b2318a4ef14416d37","sha256:03cfd60f457ef51d72cdd5e6d8d97c042814d5eaeef30950cd8e291ae1925181"],"state_sha256":"6c4b7d927b6b58c4ad7ce4ddff46baf0a66cea40e338c3f237fd54175a0d01e5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nzKZ+7yMeR+i4KWxavDJhy/nxr05RTh8Ohvwq/w7yCKBYpxFwQ/4hHCYpRIuUjbvWQltaJCFhTXg8mcS+4AHBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T02:20:42.445381Z","bundle_sha256":"f24f365c348c127dc40846e09621608ab10178482b0b4138b99a7ec26dd1dd67"}}