{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:7B7J5DXOTVRKHQTHIMYHLNV5MX","short_pith_number":"pith:7B7J5DXO","canonical_record":{"source":{"id":"2009.02648","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-09-06T05:36:52Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"34e02d2bf4c674c53aa57e59e81cbcda0ac7e59632190e4bd73af28c1735f0cb","abstract_canon_sha256":"79cc68d48e92a0df83817d62214f50db98cc9592b30393307cc47ee23f217f75"},"schema_version":"1.0"},"canonical_sha256":"f87e9e8eee9d62a3c267433075b6bd65ef1dad3e7942605079fd57826619fac3","source":{"kind":"arxiv","id":"2009.02648","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.02648","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"arxiv_version","alias_value":"2009.02648v1","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.02648","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_12","alias_value":"7B7J5DXOTVRK","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_16","alias_value":"7B7J5DXOTVRKHQTH","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_8","alias_value":"7B7J5DXO","created_at":"2026-07-05T01:44:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:7B7J5DXOTVRKHQTHIMYHLNV5MX","target":"record","payload":{"canonical_record":{"source":{"id":"2009.02648","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-09-06T05:36:52Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"34e02d2bf4c674c53aa57e59e81cbcda0ac7e59632190e4bd73af28c1735f0cb","abstract_canon_sha256":"79cc68d48e92a0df83817d62214f50db98cc9592b30393307cc47ee23f217f75"},"schema_version":"1.0"},"canonical_sha256":"f87e9e8eee9d62a3c267433075b6bd65ef1dad3e7942605079fd57826619fac3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:44:19.641330Z","signature_b64":"JJ3VpvBFDGMRpPB1RNSrvGWqNON0NbWt2yK5R6BQyIixy4Oj3nn3LJm05BWLgvQ2+ClQ8F78pCzMWNQcd/1hAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f87e9e8eee9d62a3c267433075b6bd65ef1dad3e7942605079fd57826619fac3","last_reissued_at":"2026-07-05T01:44:19.640955Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:44:19.640955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.02648","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":"2026-07-05T01:44:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2L7VnMD/w6irYMkqnTJo1WO760qhYGoKUvSL4afYCnPlLFDjpIptwnifQfxaDkCkMoWY5dFb25YhCfegu+MUBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T17:08:40.251220Z"},"content_sha256":"4c73870b7dc65aa52ccb487773d9ab51107e0b3bd80b40e82eb09a2c796c28a7","schema_version":"1.0","event_id":"sha256:4c73870b7dc65aa52ccb487773d9ab51107e0b3bd80b40e82eb09a2c796c28a7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:7B7J5DXOTVRKHQTHIMYHLNV5MX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stellar X-ray activity across the Hertzsprung-Russell diagram. I. Catalogs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Jifeng Liu, Lin He, Song Wang, Yu Bai","submitted_at":"2020-09-06T05:36:52Z","abstract_excerpt":"Stellar magnetic activity provides substantial information on the magnetic dynamo and the coronal heating process. We present a catalog of X-ray activity for about 6000 stars, based on the $Chandra$ and $Gaia$ DR2 data. We also classified more than 3000 stars as young stellar objects, dwarf stars, or giant stars. By using the stars with valid stellar parameters and classifications, we studied the distribution of X-ray luminosity ($L_X$) and the ratio of X-ray-to-bolometric luminosities ($R_X$), the positive relation between $L_X$, $R_X$, and hardness ratio, and the long-term X-ray variation. T"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.02648","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/2009.02648/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":"2026-07-05T01:44:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OSUcjrUN2PBX/Py1IeEzXz2En2+2ylVx0lXMleU3/f9r8IpOh+GaVxja7yBdfxIGpGAxcAyZs6wU1qlaD/wRAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T17:08:40.251730Z"},"content_sha256":"6e32ef0e26cf296ae31f6d6098b7fd6652ae53fda6a7f29868269cfb5914f8f6","schema_version":"1.0","event_id":"sha256:6e32ef0e26cf296ae31f6d6098b7fd6652ae53fda6a7f29868269cfb5914f8f6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7B7J5DXOTVRKHQTHIMYHLNV5MX/bundle.json","state_url":"https://pith.science/pith/7B7J5DXOTVRKHQTHIMYHLNV5MX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7B7J5DXOTVRKHQTHIMYHLNV5MX/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":"2026-08-06T17:08:40Z","links":{"resolver":"https://pith.science/pith/7B7J5DXOTVRKHQTHIMYHLNV5MX","bundle":"https://pith.science/pith/7B7J5DXOTVRKHQTHIMYHLNV5MX/bundle.json","state":"https://pith.science/pith/7B7J5DXOTVRKHQTHIMYHLNV5MX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7B7J5DXOTVRKHQTHIMYHLNV5MX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:7B7J5DXOTVRKHQTHIMYHLNV5MX","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":"79cc68d48e92a0df83817d62214f50db98cc9592b30393307cc47ee23f217f75","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-09-06T05:36:52Z","title_canon_sha256":"34e02d2bf4c674c53aa57e59e81cbcda0ac7e59632190e4bd73af28c1735f0cb"},"schema_version":"1.0","source":{"id":"2009.02648","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.02648","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"arxiv_version","alias_value":"2009.02648v1","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.02648","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_12","alias_value":"7B7J5DXOTVRK","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_16","alias_value":"7B7J5DXOTVRKHQTH","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_8","alias_value":"7B7J5DXO","created_at":"2026-07-05T01:44:19Z"}],"graph_snapshots":[{"event_id":"sha256:6e32ef0e26cf296ae31f6d6098b7fd6652ae53fda6a7f29868269cfb5914f8f6","target":"graph","created_at":"2026-07-05T01:44:19Z","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/2009.02648/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Stellar magnetic activity provides substantial information on the magnetic dynamo and the coronal heating process. We present a catalog of X-ray activity for about 6000 stars, based on the $Chandra$ and $Gaia$ DR2 data. We also classified more than 3000 stars as young stellar objects, dwarf stars, or giant stars. By using the stars with valid stellar parameters and classifications, we studied the distribution of X-ray luminosity ($L_X$) and the ratio of X-ray-to-bolometric luminosities ($R_X$), the positive relation between $L_X$, $R_X$, and hardness ratio, and the long-term X-ray variation. T","authors_text":"Jifeng Liu, Lin He, Song Wang, Yu Bai","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-09-06T05:36:52Z","title":"Stellar X-ray activity across the Hertzsprung-Russell diagram. I. Catalogs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.02648","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":"sha256:4c73870b7dc65aa52ccb487773d9ab51107e0b3bd80b40e82eb09a2c796c28a7","target":"record","created_at":"2026-07-05T01:44:19Z","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":"79cc68d48e92a0df83817d62214f50db98cc9592b30393307cc47ee23f217f75","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-09-06T05:36:52Z","title_canon_sha256":"34e02d2bf4c674c53aa57e59e81cbcda0ac7e59632190e4bd73af28c1735f0cb"},"schema_version":"1.0","source":{"id":"2009.02648","kind":"arxiv","version":1}},"canonical_sha256":"f87e9e8eee9d62a3c267433075b6bd65ef1dad3e7942605079fd57826619fac3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f87e9e8eee9d62a3c267433075b6bd65ef1dad3e7942605079fd57826619fac3","first_computed_at":"2026-07-05T01:44:19.640955Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:44:19.640955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JJ3VpvBFDGMRpPB1RNSrvGWqNON0NbWt2yK5R6BQyIixy4Oj3nn3LJm05BWLgvQ2+ClQ8F78pCzMWNQcd/1hAA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:44:19.641330Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.02648","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4c73870b7dc65aa52ccb487773d9ab51107e0b3bd80b40e82eb09a2c796c28a7","sha256:6e32ef0e26cf296ae31f6d6098b7fd6652ae53fda6a7f29868269cfb5914f8f6"],"state_sha256":"934e560814e217375ab697b49f2dfa2f68fc6106dcbeb57648520020a2a4b4de"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"99ggXeNdm6g0UepfFZJ43sfFy64m7UiyukxXrhdLMhHA6kzhnZ+/I/EsPw2H7nncUeEmthWOr7kNl3m51WIkCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T17:08:40.257565Z","bundle_sha256":"956cd0d2e6ee4ed6ef2549e80d27af7c792771490c1c0a1daaf136f4e0218bc9"}}