{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:H3WYGRKABEFRB23B4L5LDWBH5J","short_pith_number":"pith:H3WYGRKA","canonical_record":{"source":{"id":"1602.06527","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-21T13:36:38Z","cross_cats_sorted":["astro-ph.CO","hep-ph"],"title_canon_sha256":"e4c69d9212042da281f3f7136fe443e74527045cfb6efb031c616744f82da5ba","abstract_canon_sha256":"9fd110fd662e4a31399eda385ea10288500ecd9a359561cde4fd24b95e384944"},"schema_version":"1.0"},"canonical_sha256":"3eed834540090b10eb61e2fab1d827ea76ebb7cb4bdf43235da4b96e4cbc150c","source":{"kind":"arxiv","id":"1602.06527","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.06527","created_at":"2026-05-18T01:13:37Z"},{"alias_kind":"arxiv_version","alias_value":"1602.06527v2","created_at":"2026-05-18T01:13:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.06527","created_at":"2026-05-18T01:13:37Z"},{"alias_kind":"pith_short_12","alias_value":"H3WYGRKABEFR","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"H3WYGRKABEFRB23B","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"H3WYGRKA","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:H3WYGRKABEFRB23B4L5LDWBH5J","target":"record","payload":{"canonical_record":{"source":{"id":"1602.06527","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-21T13:36:38Z","cross_cats_sorted":["astro-ph.CO","hep-ph"],"title_canon_sha256":"e4c69d9212042da281f3f7136fe443e74527045cfb6efb031c616744f82da5ba","abstract_canon_sha256":"9fd110fd662e4a31399eda385ea10288500ecd9a359561cde4fd24b95e384944"},"schema_version":"1.0"},"canonical_sha256":"3eed834540090b10eb61e2fab1d827ea76ebb7cb4bdf43235da4b96e4cbc150c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:37.655421Z","signature_b64":"8vBEiBaH6lDm3qBkaAjaJEiDyIjxSDLamxjVstFX1GFmKKkKi7g2F55QOr0CC4/eFbzKOPcp6h672CAksef/CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3eed834540090b10eb61e2fab1d827ea76ebb7cb4bdf43235da4b96e4cbc150c","last_reissued_at":"2026-05-18T01:13:37.654705Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:37.654705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.06527","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:13:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tsLvf+upnhoINjbXST4YU7XrYpW142Inn5AaygrRA98PJMokhrPRcJRLOIze1CG6svldjfOrQrKeHk/feC+4Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T03:05:46.914012Z"},"content_sha256":"5ef27fa4d07cbd4500f2c3f392967d891b74440bfeaa9b0bca560bbb7d45871b","schema_version":"1.0","event_id":"sha256:5ef27fa4d07cbd4500f2c3f392967d891b74440bfeaa9b0bca560bbb7d45871b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:H3WYGRKABEFRB23B4L5LDWBH5J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for a gamma-ray line feature from a group of nearby Galaxy clusters with Fermi LAT Pass 8 data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-ph"],"primary_cat":"astro-ph.HE","authors_text":"En-Wei Liang, Jin Chang, Lei Feng, Shi-Jun Lei, Xiang Li, Xiaoyuan Huang, Yi-Zhong Fan, Yun-Feng Liang, Zhao-Qiang Shen","submitted_at":"2016-02-21T13:36:38Z","abstract_excerpt":"Galaxy clusters are the largest gravitationally bound objects in the universe and may be suitable targets for indirect dark matter searches. With 85 months of Fermi-LAT Pass 8 publicly available data, we analyze the gamma-ray emission in the directions of 16 nearby Galaxy Clusters with an unbinned likelihood analysis. No globally statistically-significant $\\gamma-$ray line feature is identified and a tentative line signal may be present at $\\sim 43$ GeV. The 95\\% confidence level upper limits on the velocity-averaged cross section of dark matter particles annihilating into double $\\gamma-$rays"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.06527","kind":"arxiv","version":2},"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":"2026-05-18T01:13:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lBN2FeWgkU0DyAHylbgklKVHHtINVdB+uVyhB7Ydpk3ETECj24hVY6zLKFYVRCygbwllDO7LV1yzSwjd6wwsCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T03:05:46.914397Z"},"content_sha256":"fe0b4185a2a2e8490d84ec05f1e1c96f3e9503051f40fe4d4a987fc5667986b9","schema_version":"1.0","event_id":"sha256:fe0b4185a2a2e8490d84ec05f1e1c96f3e9503051f40fe4d4a987fc5667986b9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/H3WYGRKABEFRB23B4L5LDWBH5J/bundle.json","state_url":"https://pith.science/pith/H3WYGRKABEFRB23B4L5LDWBH5J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/H3WYGRKABEFRB23B4L5LDWBH5J/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":"2026-06-01T03:05:46Z","links":{"resolver":"https://pith.science/pith/H3WYGRKABEFRB23B4L5LDWBH5J","bundle":"https://pith.science/pith/H3WYGRKABEFRB23B4L5LDWBH5J/bundle.json","state":"https://pith.science/pith/H3WYGRKABEFRB23B4L5LDWBH5J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/H3WYGRKABEFRB23B4L5LDWBH5J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:H3WYGRKABEFRB23B4L5LDWBH5J","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":"9fd110fd662e4a31399eda385ea10288500ecd9a359561cde4fd24b95e384944","cross_cats_sorted":["astro-ph.CO","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-21T13:36:38Z","title_canon_sha256":"e4c69d9212042da281f3f7136fe443e74527045cfb6efb031c616744f82da5ba"},"schema_version":"1.0","source":{"id":"1602.06527","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.06527","created_at":"2026-05-18T01:13:37Z"},{"alias_kind":"arxiv_version","alias_value":"1602.06527v2","created_at":"2026-05-18T01:13:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.06527","created_at":"2026-05-18T01:13:37Z"},{"alias_kind":"pith_short_12","alias_value":"H3WYGRKABEFR","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"H3WYGRKABEFRB23B","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"H3WYGRKA","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:fe0b4185a2a2e8490d84ec05f1e1c96f3e9503051f40fe4d4a987fc5667986b9","target":"graph","created_at":"2026-05-18T01:13:37Z","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":"Galaxy clusters are the largest gravitationally bound objects in the universe and may be suitable targets for indirect dark matter searches. With 85 months of Fermi-LAT Pass 8 publicly available data, we analyze the gamma-ray emission in the directions of 16 nearby Galaxy Clusters with an unbinned likelihood analysis. No globally statistically-significant $\\gamma-$ray line feature is identified and a tentative line signal may be present at $\\sim 43$ GeV. The 95\\% confidence level upper limits on the velocity-averaged cross section of dark matter particles annihilating into double $\\gamma-$rays","authors_text":"En-Wei Liang, Jin Chang, Lei Feng, Shi-Jun Lei, Xiang Li, Xiaoyuan Huang, Yi-Zhong Fan, Yun-Feng Liang, Zhao-Qiang Shen","cross_cats":["astro-ph.CO","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-21T13:36:38Z","title":"Search for a gamma-ray line feature from a group of nearby Galaxy clusters with Fermi LAT Pass 8 data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.06527","kind":"arxiv","version":2},"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":"sha256:5ef27fa4d07cbd4500f2c3f392967d891b74440bfeaa9b0bca560bbb7d45871b","target":"record","created_at":"2026-05-18T01:13:37Z","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":"9fd110fd662e4a31399eda385ea10288500ecd9a359561cde4fd24b95e384944","cross_cats_sorted":["astro-ph.CO","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-21T13:36:38Z","title_canon_sha256":"e4c69d9212042da281f3f7136fe443e74527045cfb6efb031c616744f82da5ba"},"schema_version":"1.0","source":{"id":"1602.06527","kind":"arxiv","version":2}},"canonical_sha256":"3eed834540090b10eb61e2fab1d827ea76ebb7cb4bdf43235da4b96e4cbc150c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3eed834540090b10eb61e2fab1d827ea76ebb7cb4bdf43235da4b96e4cbc150c","first_computed_at":"2026-05-18T01:13:37.654705Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:13:37.654705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8vBEiBaH6lDm3qBkaAjaJEiDyIjxSDLamxjVstFX1GFmKKkKi7g2F55QOr0CC4/eFbzKOPcp6h672CAksef/CA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:13:37.655421Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.06527","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ef27fa4d07cbd4500f2c3f392967d891b74440bfeaa9b0bca560bbb7d45871b","sha256:fe0b4185a2a2e8490d84ec05f1e1c96f3e9503051f40fe4d4a987fc5667986b9"],"state_sha256":"191a969fe0b939b49d9d4f6c204222007852f91e1b7f0a520055ded63f989164"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pXl/v3cNR1pJ1Z23m8ZznJq0kA1AoedXSOS6vYTxJ/RW1jczynDjBPqe+OsYd6BlKqJYSf3xrNjBxbWUEqN4Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T03:05:46.916515Z","bundle_sha256":"36c74b1ba3477317a427b385daed19050238183aa835192e847fee6a89314aa1"}}