{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:NJKZ6HVA7EZXGRHAQPOTRUC7C4","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":"5a3f1e8cc5009f8d069ad000ccf9f6bc8b612b4085df0916999d579fde3f5d1f","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-07-10T17:56:01Z","title_canon_sha256":"171cd332ecdeaff25c4dac6b6f56765ec8aee252949b5d4830ad0bbdd3208939"},"schema_version":"1.0","source":{"id":"1907.04849","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.04849","created_at":"2026-05-17T23:40:56Z"},{"alias_kind":"arxiv_version","alias_value":"1907.04849v1","created_at":"2026-05-17T23:40:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.04849","created_at":"2026-05-17T23:40:56Z"},{"alias_kind":"pith_short_12","alias_value":"NJKZ6HVA7EZX","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"NJKZ6HVA7EZXGRHA","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"NJKZ6HVA","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:3a6d6705b7d3422f547114f2ecadb7f0f29f71530e48014cbe8c6f17331c1f2a","target":"graph","created_at":"2026-05-17T23:40:56Z","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":"We investigate the possible parametric growth of photon amplitudes in a background of axion-like particle (ALP) dark matter. The observed extragalactic background radiation limits the allowed enhancement effect. We derive the resulting constraints on the axion-photon coupling constant $g_{a\\gamma}$ from Galactic ALP condensates as well as over-densities. If ALP condensates of size $R$ exist in our Galaxy, a scan for extremely narrow unresolved spectral lines with frequency $\\nu$ can constrain the axion-photon coupling at ALP mass $m_a=4\\pi\\nu$ to $g_{a\\gamma}\\lesssim2\\times10^{-14}(10\\,{\\rm kp","authors_text":"G\\\"unter Sigl, Pranjal Trivedi","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-07-10T17:56:01Z","title":"Axion Condensate Dark Matter Constraints from Resonant Enhancement of Background Radiation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.04849","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":"sha256:6b14cdc494c3925b88000f4c4ec2cd99992d2a9a3e955fe7b7ba010288bcd7af","target":"record","created_at":"2026-05-17T23:40:56Z","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":"5a3f1e8cc5009f8d069ad000ccf9f6bc8b612b4085df0916999d579fde3f5d1f","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-07-10T17:56:01Z","title_canon_sha256":"171cd332ecdeaff25c4dac6b6f56765ec8aee252949b5d4830ad0bbdd3208939"},"schema_version":"1.0","source":{"id":"1907.04849","kind":"arxiv","version":1}},"canonical_sha256":"6a559f1ea0f9337344e083dd38d05f171bc1c546a377e6b3d3b5e9520b0a61df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a559f1ea0f9337344e083dd38d05f171bc1c546a377e6b3d3b5e9520b0a61df","first_computed_at":"2026-05-17T23:40:56.503295Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:56.503295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J4pftAJp067SvKGHrXJah0xURDD0dwtClUt0wuace+52YmTC7mTkkgO9keTkCcyp48HSQkPozbFhsy378OPHCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:56.503931Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.04849","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6b14cdc494c3925b88000f4c4ec2cd99992d2a9a3e955fe7b7ba010288bcd7af","sha256:3a6d6705b7d3422f547114f2ecadb7f0f29f71530e48014cbe8c6f17331c1f2a"],"state_sha256":"5165ee15356ca86953048534f352a60f3c282eaa20292ef37b4848b9865e0fea"}