{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:NRELGPJ7QZG3BLAWF5NNGIFORE","short_pith_number":"pith:NRELGPJ7","canonical_record":{"source":{"id":"1604.02679","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-10T12:27:09Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"ff8823bfc926a0f9391351079136d7f3b646123deba75ed0ee14b7ee3226a6b8","abstract_canon_sha256":"fc811e6c91fec09a1047794078cdcb9e1be2f7ed66c8c8c003654a4dfa76a163"},"schema_version":"1.0"},"canonical_sha256":"6c48b33d3f864db0ac162f5ad320ae891b431452f6ec0e76d559c0ff504e4685","source":{"kind":"arxiv","id":"1604.02679","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.02679","created_at":"2026-05-18T01:16:12Z"},{"alias_kind":"arxiv_version","alias_value":"1604.02679v1","created_at":"2026-05-18T01:16:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02679","created_at":"2026-05-18T01:16:12Z"},{"alias_kind":"pith_short_12","alias_value":"NRELGPJ7QZG3","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"NRELGPJ7QZG3BLAW","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"NRELGPJ7","created_at":"2026-05-18T12:30:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:NRELGPJ7QZG3BLAWF5NNGIFORE","target":"record","payload":{"canonical_record":{"source":{"id":"1604.02679","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-10T12:27:09Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"ff8823bfc926a0f9391351079136d7f3b646123deba75ed0ee14b7ee3226a6b8","abstract_canon_sha256":"fc811e6c91fec09a1047794078cdcb9e1be2f7ed66c8c8c003654a4dfa76a163"},"schema_version":"1.0"},"canonical_sha256":"6c48b33d3f864db0ac162f5ad320ae891b431452f6ec0e76d559c0ff504e4685","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:12.919983Z","signature_b64":"RusoyPe+lnl/+w45JTRydVh8OyE2uNBxNvzPmxe+/1tMMx8xWTVMq0bVIe22f7BUQLOexw2fP+KbLqdKiSOGBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c48b33d3f864db0ac162f5ad320ae891b431452f6ec0e76d559c0ff504e4685","last_reissued_at":"2026-05-18T01:16:12.919393Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:12.919393Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.02679","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":"2026-05-18T01:16:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qeT8JbzpctdWYCRfx9Zua0a/KSPgg2FXlczAa6/wVtUuyV6YHvsI5fXefLEIuAdZ1aVvGEohjRJ1h9ihqXzqAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:37:51.710051Z"},"content_sha256":"2e253ce628b8c67e0f1048a309a015ae3dc439fab88ccf52155223e9a98f2e63","schema_version":"1.0","event_id":"sha256:2e253ce628b8c67e0f1048a309a015ae3dc439fab88ccf52155223e9a98f2e63"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:NRELGPJ7QZG3BLAWF5NNGIFORE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First Detection of $^3$He$^+$ in the Planetary Nebula IC$\\,$418","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. A. Zijlstra, C. Garc\\'ia-Mir\\'o, C. Morisset, J. R. Rizzo, L. Guzman-Ramirez, M. D. Gray","submitted_at":"2016-04-10T12:27:09Z","abstract_excerpt":"The $^3$He isotope is important to many fields of astrophysics, including stellar evolution, chemical evolution, and cosmology. The isotope is produced in low-mass stars which evolve through the planetary nebula (PN) phase. $^3$He abundances in PNe can help test models of the chemical evolution of the Galaxy. We present the detection of the $^3$He$^+$ emission line using the single dish Deep Space Station 63, towards the PN IC$\\,$418. We derived a $^3$He/H abundance in the range 1.74$\\pm$0.8$\\times$10$^{-3}$ to 5.8$\\pm$1.7$\\times$10$^{-3}$, depending on whether part of the line arises in an ou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02679","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":"2026-05-18T01:16:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aC4bCY2LUT/WWjj6Lk4YdcekDK95Yto0dzaZyUkIsPs9TyGQVbIfrSXmZqQcVfCIMsWVim160kUtcQiOxhwGAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:37:51.710699Z"},"content_sha256":"6ff41368a11a8fec65aa627a4d4c52d27789c0eedf83d42d48da5165d3c6d7c0","schema_version":"1.0","event_id":"sha256:6ff41368a11a8fec65aa627a4d4c52d27789c0eedf83d42d48da5165d3c6d7c0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/bundle.json","state_url":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/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":"2026-05-27T12:37:51Z","links":{"resolver":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE","bundle":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/bundle.json","state":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:NRELGPJ7QZG3BLAWF5NNGIFORE","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":"fc811e6c91fec09a1047794078cdcb9e1be2f7ed66c8c8c003654a4dfa76a163","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-10T12:27:09Z","title_canon_sha256":"ff8823bfc926a0f9391351079136d7f3b646123deba75ed0ee14b7ee3226a6b8"},"schema_version":"1.0","source":{"id":"1604.02679","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.02679","created_at":"2026-05-18T01:16:12Z"},{"alias_kind":"arxiv_version","alias_value":"1604.02679v1","created_at":"2026-05-18T01:16:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02679","created_at":"2026-05-18T01:16:12Z"},{"alias_kind":"pith_short_12","alias_value":"NRELGPJ7QZG3","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"NRELGPJ7QZG3BLAW","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"NRELGPJ7","created_at":"2026-05-18T12:30:36Z"}],"graph_snapshots":[{"event_id":"sha256:6ff41368a11a8fec65aa627a4d4c52d27789c0eedf83d42d48da5165d3c6d7c0","target":"graph","created_at":"2026-05-18T01:16:12Z","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":"The $^3$He isotope is important to many fields of astrophysics, including stellar evolution, chemical evolution, and cosmology. The isotope is produced in low-mass stars which evolve through the planetary nebula (PN) phase. $^3$He abundances in PNe can help test models of the chemical evolution of the Galaxy. We present the detection of the $^3$He$^+$ emission line using the single dish Deep Space Station 63, towards the PN IC$\\,$418. We derived a $^3$He/H abundance in the range 1.74$\\pm$0.8$\\times$10$^{-3}$ to 5.8$\\pm$1.7$\\times$10$^{-3}$, depending on whether part of the line arises in an ou","authors_text":"A. A. Zijlstra, C. Garc\\'ia-Mir\\'o, C. Morisset, J. R. Rizzo, L. Guzman-Ramirez, M. D. Gray","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-10T12:27:09Z","title":"First Detection of $^3$He$^+$ in the Planetary Nebula IC$\\,$418"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02679","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":"sha256:2e253ce628b8c67e0f1048a309a015ae3dc439fab88ccf52155223e9a98f2e63","target":"record","created_at":"2026-05-18T01:16:12Z","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":"fc811e6c91fec09a1047794078cdcb9e1be2f7ed66c8c8c003654a4dfa76a163","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-10T12:27:09Z","title_canon_sha256":"ff8823bfc926a0f9391351079136d7f3b646123deba75ed0ee14b7ee3226a6b8"},"schema_version":"1.0","source":{"id":"1604.02679","kind":"arxiv","version":1}},"canonical_sha256":"6c48b33d3f864db0ac162f5ad320ae891b431452f6ec0e76d559c0ff504e4685","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6c48b33d3f864db0ac162f5ad320ae891b431452f6ec0e76d559c0ff504e4685","first_computed_at":"2026-05-18T01:16:12.919393Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:12.919393Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RusoyPe+lnl/+w45JTRydVh8OyE2uNBxNvzPmxe+/1tMMx8xWTVMq0bVIe22f7BUQLOexw2fP+KbLqdKiSOGBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:12.919983Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.02679","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2e253ce628b8c67e0f1048a309a015ae3dc439fab88ccf52155223e9a98f2e63","sha256:6ff41368a11a8fec65aa627a4d4c52d27789c0eedf83d42d48da5165d3c6d7c0"],"state_sha256":"30bd425bfe117416c4faca36a50424f43be5317277405315085f699a2055d501"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o7rc6qaorWiXVAEb9yCxC3FquO+is6AmcIhTe0uMo4JUGJ9JGAZbqDxMwgVc0Y8o2CG+HzqT6PBxBM7p7Vc9CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T12:37:51.713030Z","bundle_sha256":"2b46046ec77d69272c942c77122237b4c4e62e70bb14b83fbc52534063447f3f"}}