{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:UZWAVPR22T44YYWC3CHYD6GBHW","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":"f5a2b4de31525335e4e00e943e1f58f836f17b5bb9d09985a3537e3055c34d96","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-09-22T20:14:16Z","title_canon_sha256":"44d3f5146a5ac21e4e3c1e05591dd5e784e4ed7a0cdb98abb50fecc23eef7364"},"schema_version":"1.0","source":{"id":"1509.06748","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.06748","created_at":"2026-05-18T01:11:33Z"},{"alias_kind":"arxiv_version","alias_value":"1509.06748v1","created_at":"2026-05-18T01:11:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.06748","created_at":"2026-05-18T01:11:33Z"},{"alias_kind":"pith_short_12","alias_value":"UZWAVPR22T44","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"UZWAVPR22T44YYWC","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"UZWAVPR2","created_at":"2026-05-18T12:29:44Z"}],"graph_snapshots":[{"event_id":"sha256:6497ef529e43db149209c52b096d651f4df8d4e044748ef93e73f92cdba93869","target":"graph","created_at":"2026-05-18T01:11:33Z","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":"Axion-like particles (ALPs) and photons inter-convert in the presence of a magnetic field. At keV energies in the environment of galaxy clusters, the conversion probability can become unsuppressed for light ALPs. Conversion of thermal X-ray photons into ALPs can introduce a step-like feature into the cluster thermal bremsstrahlung spectrum, and we argue that existing X-ray data on galaxy clusters should be sufficient to extend bounds on ALPs in the low-mass region $m_a \\lesssim 1 \\times 10^{-12}\\,{\\rm eV}$ down to $M \\sim 7\\times 10^{11}\\, {\\rm GeV}$, and that for $10^{11}\\, {\\rm GeV} < M \\les","authors_text":"Andrew J. Powell, Joseph P. Conlon, M. C. David Marsh","cross_cats":["astro-ph.CO","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-09-22T20:14:16Z","title":"Galaxy Cluster Thermal X-Ray Spectra Constrain Axion-Like Particles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.06748","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":"sha256:419dc01a002a27574eebf8e9573aeaf401fcf356d8c722f7c697039e53502ab3","target":"record","created_at":"2026-05-18T01:11:33Z","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":"f5a2b4de31525335e4e00e943e1f58f836f17b5bb9d09985a3537e3055c34d96","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-09-22T20:14:16Z","title_canon_sha256":"44d3f5146a5ac21e4e3c1e05591dd5e784e4ed7a0cdb98abb50fecc23eef7364"},"schema_version":"1.0","source":{"id":"1509.06748","kind":"arxiv","version":1}},"canonical_sha256":"a66c0abe3ad4f9cc62c2d88f81f8c13d88fbbc433d6b30e12148659567646bd5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a66c0abe3ad4f9cc62c2d88f81f8c13d88fbbc433d6b30e12148659567646bd5","first_computed_at":"2026-05-18T01:11:33.359885Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:33.359885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qVW+ht5BNDLNahr6r7TfjgJZxl6M+e6rphRrXcXi5GhK9JpJYobbYS+nJVLdbVX4UXiljwmOgliQBn72HCuHAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:33.360276Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.06748","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:419dc01a002a27574eebf8e9573aeaf401fcf356d8c722f7c697039e53502ab3","sha256:6497ef529e43db149209c52b096d651f4df8d4e044748ef93e73f92cdba93869"],"state_sha256":"aca6afccc5fb681733d36d9743a868f364829bb3e8185a3a9c90312a0c218602"}