{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:LOTFVBW7ZJATHCTI3XAY2YSTOZ","short_pith_number":"pith:LOTFVBW7","canonical_record":{"source":{"id":"1906.01318","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-06-04T10:19:12Z","cross_cats_sorted":[],"title_canon_sha256":"9c8638bf7cbcea3ff122717739958224b33dc0ebc5b2b2a1538f821fb8391017","abstract_canon_sha256":"a4cbafcafb89684ab7385c091f19c562ef805aaa84ddef00ed4d5922e1dc3259"},"schema_version":"1.0"},"canonical_sha256":"5ba65a86dfca41338a68ddc18d62537669a245e7530b00216373b394353c2bc0","source":{"kind":"arxiv","id":"1906.01318","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.01318","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"arxiv_version","alias_value":"1906.01318v1","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.01318","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"pith_short_12","alias_value":"LOTFVBW7ZJAT","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LOTFVBW7ZJATHCTI","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LOTFVBW7","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:LOTFVBW7ZJATHCTI3XAY2YSTOZ","target":"record","payload":{"canonical_record":{"source":{"id":"1906.01318","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-06-04T10:19:12Z","cross_cats_sorted":[],"title_canon_sha256":"9c8638bf7cbcea3ff122717739958224b33dc0ebc5b2b2a1538f821fb8391017","abstract_canon_sha256":"a4cbafcafb89684ab7385c091f19c562ef805aaa84ddef00ed4d5922e1dc3259"},"schema_version":"1.0"},"canonical_sha256":"5ba65a86dfca41338a68ddc18d62537669a245e7530b00216373b394353c2bc0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:34.009528Z","signature_b64":"jRNTaqnV4eFf9Z8RPj27pwkMER2OoWF7SMhg2pqqPzqm6F4jbNjgL3u0oao1DLdcGwsUZf350JKW+a6OZkC9Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5ba65a86dfca41338a68ddc18d62537669a245e7530b00216373b394353c2bc0","last_reissued_at":"2026-05-17T23:43:34.009030Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:34.009030Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.01318","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":"2026-05-17T23:43:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kS16gPALqTzulZ5HeRQCJ56JkCNW8w/NVYYE/GzNfLv+t5AGikoRj6zU3ZvwPAT9DSi+ICTowbMx/uIFyKmPDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:24:44.613885Z"},"content_sha256":"31ce61144bc6e9eb49d0e5f2db2bcee63f2fcca5d2973aed491f8565493b83c0","schema_version":"1.0","event_id":"sha256:31ce61144bc6e9eb49d0e5f2db2bcee63f2fcca5d2973aed491f8565493b83c0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:LOTFVBW7ZJATHCTI3XAY2YSTOZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Non-dissipative photospheres in GRBs: Spectral appearance in the Fermi/GBM catalogue","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Felix Ryde, Hoi-Fung Yu, Zeynep Acuner","submitted_at":"2019-06-04T10:19:12Z","abstract_excerpt":"A large fraction of gamma-ray burst (GRB) spectra are very hard below the peak. Indeed, the observed distribution of sub-peak power-law indices, $\\alpha$, has been used as an argument for a photospheric origin of GRB spectra. Here, we investigate what fraction of GRBs have spectra that are consistent with emission from a photopshere in a non-dissipative outflow. This is the simplest possible photospheric emission scenario. We create synthetic spectra, with a range of peak energies, by folding the theoretical predictions through the detector response of the FERMI/GBM detector. These simulated s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.01318","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":"2026-05-17T23:43:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fTlfq8orkebDU9ASNCQBDcOcvDtaziO4Qeo139EPHutpyLMx3doqaai9eq5J99fvJ9ZoNzaWN3cCYechHWo1BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:24:44.614239Z"},"content_sha256":"417494472a4f299b0ec4838da5df53b8fe9abcf1fee6cf5ce7e45f15548ebb81","schema_version":"1.0","event_id":"sha256:417494472a4f299b0ec4838da5df53b8fe9abcf1fee6cf5ce7e45f15548ebb81"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LOTFVBW7ZJATHCTI3XAY2YSTOZ/bundle.json","state_url":"https://pith.science/pith/LOTFVBW7ZJATHCTI3XAY2YSTOZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LOTFVBW7ZJATHCTI3XAY2YSTOZ/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":"2026-06-03T07:24:44Z","links":{"resolver":"https://pith.science/pith/LOTFVBW7ZJATHCTI3XAY2YSTOZ","bundle":"https://pith.science/pith/LOTFVBW7ZJATHCTI3XAY2YSTOZ/bundle.json","state":"https://pith.science/pith/LOTFVBW7ZJATHCTI3XAY2YSTOZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LOTFVBW7ZJATHCTI3XAY2YSTOZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:LOTFVBW7ZJATHCTI3XAY2YSTOZ","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":"a4cbafcafb89684ab7385c091f19c562ef805aaa84ddef00ed4d5922e1dc3259","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-06-04T10:19:12Z","title_canon_sha256":"9c8638bf7cbcea3ff122717739958224b33dc0ebc5b2b2a1538f821fb8391017"},"schema_version":"1.0","source":{"id":"1906.01318","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.01318","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"arxiv_version","alias_value":"1906.01318v1","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.01318","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"pith_short_12","alias_value":"LOTFVBW7ZJAT","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LOTFVBW7ZJATHCTI","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LOTFVBW7","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:417494472a4f299b0ec4838da5df53b8fe9abcf1fee6cf5ce7e45f15548ebb81","target":"graph","created_at":"2026-05-17T23:43:34Z","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":"A large fraction of gamma-ray burst (GRB) spectra are very hard below the peak. Indeed, the observed distribution of sub-peak power-law indices, $\\alpha$, has been used as an argument for a photospheric origin of GRB spectra. Here, we investigate what fraction of GRBs have spectra that are consistent with emission from a photopshere in a non-dissipative outflow. This is the simplest possible photospheric emission scenario. We create synthetic spectra, with a range of peak energies, by folding the theoretical predictions through the detector response of the FERMI/GBM detector. These simulated s","authors_text":"Felix Ryde, Hoi-Fung Yu, Zeynep Acuner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-06-04T10:19:12Z","title":"Non-dissipative photospheres in GRBs: Spectral appearance in the Fermi/GBM catalogue"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.01318","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":"sha256:31ce61144bc6e9eb49d0e5f2db2bcee63f2fcca5d2973aed491f8565493b83c0","target":"record","created_at":"2026-05-17T23:43:34Z","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":"a4cbafcafb89684ab7385c091f19c562ef805aaa84ddef00ed4d5922e1dc3259","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-06-04T10:19:12Z","title_canon_sha256":"9c8638bf7cbcea3ff122717739958224b33dc0ebc5b2b2a1538f821fb8391017"},"schema_version":"1.0","source":{"id":"1906.01318","kind":"arxiv","version":1}},"canonical_sha256":"5ba65a86dfca41338a68ddc18d62537669a245e7530b00216373b394353c2bc0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ba65a86dfca41338a68ddc18d62537669a245e7530b00216373b394353c2bc0","first_computed_at":"2026-05-17T23:43:34.009030Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:34.009030Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jRNTaqnV4eFf9Z8RPj27pwkMER2OoWF7SMhg2pqqPzqm6F4jbNjgL3u0oao1DLdcGwsUZf350JKW+a6OZkC9Aw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:34.009528Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.01318","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:31ce61144bc6e9eb49d0e5f2db2bcee63f2fcca5d2973aed491f8565493b83c0","sha256:417494472a4f299b0ec4838da5df53b8fe9abcf1fee6cf5ce7e45f15548ebb81"],"state_sha256":"3a82a17c528209abc9e7ffe3679705c6568c906fcb7d61f9cb03809348342b0c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wLKijT2UIYD2Junlw9cx1tvciLJ5DMBkBB/8EnE0Taoz5YTjVXOaOoyNCja5mgoq9W6YPbkHKjcCUGkr0W2RBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T07:24:44.616172Z","bundle_sha256":"11807fe57598060207294d05ac04a044e5bf630eac7551226e06d286a73a920d"}}