{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:IB3RRIQO4HNURIDOAXLR6LL6P7","short_pith_number":"pith:IB3RRIQO","canonical_record":{"source":{"id":"1507.04619","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-16T15:22:55Z","cross_cats_sorted":[],"title_canon_sha256":"0e2fbff3fcdb3bac02e96576cdde4f1b4f70d5d7a7f36b41db64f737a0d05411","abstract_canon_sha256":"0e952025cd411e12cd3254afc0ba63c8b453ceca196bd33eaf25934817825175"},"schema_version":"1.0"},"canonical_sha256":"407718a20ee1db48a06e05d71f2d7e7ff60f08eb071f4afab24eb7599e00ff78","source":{"kind":"arxiv","id":"1507.04619","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.04619","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"arxiv_version","alias_value":"1507.04619v1","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.04619","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"pith_short_12","alias_value":"IB3RRIQO4HNU","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IB3RRIQO4HNURIDO","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IB3RRIQO","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:IB3RRIQO4HNURIDOAXLR6LL6P7","target":"record","payload":{"canonical_record":{"source":{"id":"1507.04619","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-16T15:22:55Z","cross_cats_sorted":[],"title_canon_sha256":"0e2fbff3fcdb3bac02e96576cdde4f1b4f70d5d7a7f36b41db64f737a0d05411","abstract_canon_sha256":"0e952025cd411e12cd3254afc0ba63c8b453ceca196bd33eaf25934817825175"},"schema_version":"1.0"},"canonical_sha256":"407718a20ee1db48a06e05d71f2d7e7ff60f08eb071f4afab24eb7599e00ff78","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:06.848375Z","signature_b64":"NufCxLrGoF6LuQ3Byai7ML60hIYIH0pDhoZ6aN55AZT50Warhfo+2dJ9SL/5YvRt9MCV7TYvz7i8HFaFE+ZgDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"407718a20ee1db48a06e05d71f2d7e7ff60f08eb071f4afab24eb7599e00ff78","last_reissued_at":"2026-05-18T01:35:06.847678Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:06.847678Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.04619","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":"2026-05-18T01:35:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9pnYtmmySqmTXVCWqVtoyBwSgXqPOLCPYO7zNyuNWQ4amy/up/eunhFIvSp9yCgFKQChCsVtfMPnn+OWlcqOCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:26:28.640260Z"},"content_sha256":"859c9c65b0e1163d7f36427ed86b389785fbcc055dc29a148475fe07237a037a","schema_version":"1.0","event_id":"sha256:859c9c65b0e1163d7f36427ed86b389785fbcc055dc29a148475fe07237a037a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:IB3RRIQO4HNURIDOAXLR6LL6P7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The X-Ray Line Feature At 3.5 Kev In Galaxy Cluster Spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"B. Sylwester, J. Sylwester, K. J. H. Phillips","submitted_at":"2015-07-16T15:22:55Z","abstract_excerpt":"Recent work by Bulbul et al. and Boyarsky et al. has suggested that a line feature at approx. 3.5 keV in the X-ray spectra of galaxy clusters and individual galaxies seen with XMM-Newton is due to the decay of sterile neutrinos, a dark matter candidate. This identification has been criticized by Jeltema and Profumo on the grounds that model spectra suggest that atomic transitions in helium-like potassium (K XVIII) and chlorine (Cl XVI) are more likely to be the emitters. Here it is pointed out that the K XVIII lines have been observed in numerous solar flare spectra at high spectral resolution"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.04619","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":"2026-05-18T01:35:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f/I6gHXu72cWyf+50qO69WrfK8VFqNikwpc241/5k7OEhygxE7P9VT5877tPlDORX2eBDaJV4dOcb4Yvq//EAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:26:28.640633Z"},"content_sha256":"ea73a8f822c8f70a2908e464b350f188286f3b2cb3a4640841ca8ee9af04b73f","schema_version":"1.0","event_id":"sha256:ea73a8f822c8f70a2908e464b350f188286f3b2cb3a4640841ca8ee9af04b73f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IB3RRIQO4HNURIDOAXLR6LL6P7/bundle.json","state_url":"https://pith.science/pith/IB3RRIQO4HNURIDOAXLR6LL6P7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IB3RRIQO4HNURIDOAXLR6LL6P7/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":"2026-05-28T06:26:28Z","links":{"resolver":"https://pith.science/pith/IB3RRIQO4HNURIDOAXLR6LL6P7","bundle":"https://pith.science/pith/IB3RRIQO4HNURIDOAXLR6LL6P7/bundle.json","state":"https://pith.science/pith/IB3RRIQO4HNURIDOAXLR6LL6P7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IB3RRIQO4HNURIDOAXLR6LL6P7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IB3RRIQO4HNURIDOAXLR6LL6P7","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":"0e952025cd411e12cd3254afc0ba63c8b453ceca196bd33eaf25934817825175","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-16T15:22:55Z","title_canon_sha256":"0e2fbff3fcdb3bac02e96576cdde4f1b4f70d5d7a7f36b41db64f737a0d05411"},"schema_version":"1.0","source":{"id":"1507.04619","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.04619","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"arxiv_version","alias_value":"1507.04619v1","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.04619","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"pith_short_12","alias_value":"IB3RRIQO4HNU","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IB3RRIQO4HNURIDO","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IB3RRIQO","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:ea73a8f822c8f70a2908e464b350f188286f3b2cb3a4640841ca8ee9af04b73f","target":"graph","created_at":"2026-05-18T01:35:06Z","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":"Recent work by Bulbul et al. and Boyarsky et al. has suggested that a line feature at approx. 3.5 keV in the X-ray spectra of galaxy clusters and individual galaxies seen with XMM-Newton is due to the decay of sterile neutrinos, a dark matter candidate. This identification has been criticized by Jeltema and Profumo on the grounds that model spectra suggest that atomic transitions in helium-like potassium (K XVIII) and chlorine (Cl XVI) are more likely to be the emitters. Here it is pointed out that the K XVIII lines have been observed in numerous solar flare spectra at high spectral resolution","authors_text":"B. Sylwester, J. Sylwester, K. J. H. Phillips","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-16T15:22:55Z","title":"The X-Ray Line Feature At 3.5 Kev In Galaxy Cluster Spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.04619","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":"sha256:859c9c65b0e1163d7f36427ed86b389785fbcc055dc29a148475fe07237a037a","target":"record","created_at":"2026-05-18T01:35:06Z","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":"0e952025cd411e12cd3254afc0ba63c8b453ceca196bd33eaf25934817825175","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-16T15:22:55Z","title_canon_sha256":"0e2fbff3fcdb3bac02e96576cdde4f1b4f70d5d7a7f36b41db64f737a0d05411"},"schema_version":"1.0","source":{"id":"1507.04619","kind":"arxiv","version":1}},"canonical_sha256":"407718a20ee1db48a06e05d71f2d7e7ff60f08eb071f4afab24eb7599e00ff78","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"407718a20ee1db48a06e05d71f2d7e7ff60f08eb071f4afab24eb7599e00ff78","first_computed_at":"2026-05-18T01:35:06.847678Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:06.847678Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NufCxLrGoF6LuQ3Byai7ML60hIYIH0pDhoZ6aN55AZT50Warhfo+2dJ9SL/5YvRt9MCV7TYvz7i8HFaFE+ZgDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:06.848375Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.04619","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:859c9c65b0e1163d7f36427ed86b389785fbcc055dc29a148475fe07237a037a","sha256:ea73a8f822c8f70a2908e464b350f188286f3b2cb3a4640841ca8ee9af04b73f"],"state_sha256":"5907160e2b5bdc20ba207d9255e75ec2f103b22c02a193c1ccdb33feb0baea8e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HhB4x2ahLw57xDLPvBR6u1N0OKuNB3M+wcB7bPhtcs8iS+L983+zMvHrhJiLezk5aggg/a244p+FFPfGOZHLBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T06:26:28.642582Z","bundle_sha256":"36dc41891900d55c535f07465ce39d3b708dab551aa1724a9c393d1b68dd48cd"}}