{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:XCGP55IKGH2YJXWWKBX3ADPBFA","short_pith_number":"pith:XCGP55IK","canonical_record":{"source":{"id":"1111.1636","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-11-07T16:35:19Z","cross_cats_sorted":[],"title_canon_sha256":"aa936b6937f2e1e1e9e6903ca22c66eea2551e830c88023ed2502bd15275d2e2","abstract_canon_sha256":"eff3408b07d44c0558607757cd6222956c379710996c9263532c620221322b73"},"schema_version":"1.0"},"canonical_sha256":"b88cfef50a31f584ded6506fb00de1282c06b13dfbadaa9b1831c7251d111ed7","source":{"kind":"arxiv","id":"1111.1636","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.1636","created_at":"2026-05-18T04:09:24Z"},{"alias_kind":"arxiv_version","alias_value":"1111.1636v2","created_at":"2026-05-18T04:09:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.1636","created_at":"2026-05-18T04:09:24Z"},{"alias_kind":"pith_short_12","alias_value":"XCGP55IKGH2Y","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_16","alias_value":"XCGP55IKGH2YJXWW","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_8","alias_value":"XCGP55IK","created_at":"2026-05-18T12:26:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:XCGP55IKGH2YJXWWKBX3ADPBFA","target":"record","payload":{"canonical_record":{"source":{"id":"1111.1636","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-11-07T16:35:19Z","cross_cats_sorted":[],"title_canon_sha256":"aa936b6937f2e1e1e9e6903ca22c66eea2551e830c88023ed2502bd15275d2e2","abstract_canon_sha256":"eff3408b07d44c0558607757cd6222956c379710996c9263532c620221322b73"},"schema_version":"1.0"},"canonical_sha256":"b88cfef50a31f584ded6506fb00de1282c06b13dfbadaa9b1831c7251d111ed7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:09:24.840891Z","signature_b64":"Q3WVac6pkNN0aga6LhqpvwfDEyCYaW358epJfwmgYKuEEYlb6+hOn/9YqTR4Xys8XsIhgxyyyoAAgLGwSsliBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b88cfef50a31f584ded6506fb00de1282c06b13dfbadaa9b1831c7251d111ed7","last_reissued_at":"2026-05-18T04:09:24.840387Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:09:24.840387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.1636","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":"2026-05-18T04:09:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kOZNqNvWZs/5FoSSm/QSurhHhsU1L7GSWF3RtPipm/3/lS1OOd088hjvFzWGV6k3o/aHMONwp4FHeI840cEcAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T19:56:06.127622Z"},"content_sha256":"f24e368617e99862ac16849c69d068980a88b39ad97d52c7a8faf6b42a64a92d","schema_version":"1.0","event_id":"sha256:f24e368617e99862ac16849c69d068980a88b39ad97d52c7a8faf6b42a64a92d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:XCGP55IKGH2YJXWWKBX3ADPBFA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An alternative solution to the gamma-ray Gradient problem","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Carmelo Evoli, Daniele Gaggero, Dario Grasso, Luca Maccione","submitted_at":"2011-11-07T16:35:19Z","abstract_excerpt":"The Fermi-LAT collaboration recently confirmed EGRET finding of a discrepancy between the observed longitudinal profile of gamma-ray diffuse emission from the Galaxy and that computed with GALPROP assuming that cosmic rays are produced by Galactic supernova remnants. The accurate Fermi-LAT measurements make this anomaly hardly explainable in terms of conventional diffusion schemes. Here we use DRAGON numerical diffusion code to implement a physically motivated scenario in which the diffusion coefficient is spatially correlated to the source density. We show that under those conditions we are a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.1636","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":"2026-05-18T04:09:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pJNcZ2ZCuWYfW+FHyZBaNLTpwDHjzKQXB9BEDFDzugN5Qv1LjbpFFhZfu8tazto3v5831fK5S54/Fa0UwCrrAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T19:56:06.127969Z"},"content_sha256":"3b2d255812a6981be5e840f7ffbb4e8ee4aa5536625db4773a266b61e70f278b","schema_version":"1.0","event_id":"sha256:3b2d255812a6981be5e840f7ffbb4e8ee4aa5536625db4773a266b61e70f278b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XCGP55IKGH2YJXWWKBX3ADPBFA/bundle.json","state_url":"https://pith.science/pith/XCGP55IKGH2YJXWWKBX3ADPBFA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XCGP55IKGH2YJXWWKBX3ADPBFA/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":"2026-06-03T19:56:06Z","links":{"resolver":"https://pith.science/pith/XCGP55IKGH2YJXWWKBX3ADPBFA","bundle":"https://pith.science/pith/XCGP55IKGH2YJXWWKBX3ADPBFA/bundle.json","state":"https://pith.science/pith/XCGP55IKGH2YJXWWKBX3ADPBFA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XCGP55IKGH2YJXWWKBX3ADPBFA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:XCGP55IKGH2YJXWWKBX3ADPBFA","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":"eff3408b07d44c0558607757cd6222956c379710996c9263532c620221322b73","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-11-07T16:35:19Z","title_canon_sha256":"aa936b6937f2e1e1e9e6903ca22c66eea2551e830c88023ed2502bd15275d2e2"},"schema_version":"1.0","source":{"id":"1111.1636","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.1636","created_at":"2026-05-18T04:09:24Z"},{"alias_kind":"arxiv_version","alias_value":"1111.1636v2","created_at":"2026-05-18T04:09:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.1636","created_at":"2026-05-18T04:09:24Z"},{"alias_kind":"pith_short_12","alias_value":"XCGP55IKGH2Y","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_16","alias_value":"XCGP55IKGH2YJXWW","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_8","alias_value":"XCGP55IK","created_at":"2026-05-18T12:26:44Z"}],"graph_snapshots":[{"event_id":"sha256:3b2d255812a6981be5e840f7ffbb4e8ee4aa5536625db4773a266b61e70f278b","target":"graph","created_at":"2026-05-18T04:09:24Z","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":"The Fermi-LAT collaboration recently confirmed EGRET finding of a discrepancy between the observed longitudinal profile of gamma-ray diffuse emission from the Galaxy and that computed with GALPROP assuming that cosmic rays are produced by Galactic supernova remnants. The accurate Fermi-LAT measurements make this anomaly hardly explainable in terms of conventional diffusion schemes. Here we use DRAGON numerical diffusion code to implement a physically motivated scenario in which the diffusion coefficient is spatially correlated to the source density. We show that under those conditions we are a","authors_text":"Carmelo Evoli, Daniele Gaggero, Dario Grasso, Luca Maccione","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-11-07T16:35:19Z","title":"An alternative solution to the gamma-ray Gradient problem"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.1636","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:f24e368617e99862ac16849c69d068980a88b39ad97d52c7a8faf6b42a64a92d","target":"record","created_at":"2026-05-18T04:09:24Z","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":"eff3408b07d44c0558607757cd6222956c379710996c9263532c620221322b73","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-11-07T16:35:19Z","title_canon_sha256":"aa936b6937f2e1e1e9e6903ca22c66eea2551e830c88023ed2502bd15275d2e2"},"schema_version":"1.0","source":{"id":"1111.1636","kind":"arxiv","version":2}},"canonical_sha256":"b88cfef50a31f584ded6506fb00de1282c06b13dfbadaa9b1831c7251d111ed7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b88cfef50a31f584ded6506fb00de1282c06b13dfbadaa9b1831c7251d111ed7","first_computed_at":"2026-05-18T04:09:24.840387Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:09:24.840387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q3WVac6pkNN0aga6LhqpvwfDEyCYaW358epJfwmgYKuEEYlb6+hOn/9YqTR4Xys8XsIhgxyyyoAAgLGwSsliBA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:09:24.840891Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.1636","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f24e368617e99862ac16849c69d068980a88b39ad97d52c7a8faf6b42a64a92d","sha256:3b2d255812a6981be5e840f7ffbb4e8ee4aa5536625db4773a266b61e70f278b"],"state_sha256":"064e64baa35e050f8550d9b187f697fc6b27bcd120f42318459e8de333e64461"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4xgKD4DbhnsszqsFkRL+dWmrr5Mh/YndVMnmYNRNZh0Uhtx+7POABXjqa0tIbrckF5ewelgl8ARAl97nnQskDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T19:56:06.129950Z","bundle_sha256":"00279e128928d7a20add01b77b7479b56e0e4b19a42d3c94df19a25e16152835"}}