{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:RL4G6PQQIXJJL6N6WDDNP7G6IY","short_pith_number":"pith:RL4G6PQQ","canonical_record":{"source":{"id":"1312.6882","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-24T19:44:29Z","cross_cats_sorted":[],"title_canon_sha256":"90581633808afa7756314c47c80c4aa84a965ed77b96484cce7a1ad341ffbf8b","abstract_canon_sha256":"991af2c178bba2d58b5d3870d12ccc77b4a86f5c7dea01e6aab1e184f2e7f0cc"},"schema_version":"1.0"},"canonical_sha256":"8af86f3e1045d295f9beb0c6d7fcde4622387238fe78e103cc9b7c61bb217a02","source":{"kind":"arxiv","id":"1312.6882","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.6882","created_at":"2026-05-18T01:45:41Z"},{"alias_kind":"arxiv_version","alias_value":"1312.6882v1","created_at":"2026-05-18T01:45:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.6882","created_at":"2026-05-18T01:45:41Z"},{"alias_kind":"pith_short_12","alias_value":"RL4G6PQQIXJJ","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"RL4G6PQQIXJJL6N6","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"RL4G6PQQ","created_at":"2026-05-18T12:27:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:RL4G6PQQIXJJL6N6WDDNP7G6IY","target":"record","payload":{"canonical_record":{"source":{"id":"1312.6882","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-24T19:44:29Z","cross_cats_sorted":[],"title_canon_sha256":"90581633808afa7756314c47c80c4aa84a965ed77b96484cce7a1ad341ffbf8b","abstract_canon_sha256":"991af2c178bba2d58b5d3870d12ccc77b4a86f5c7dea01e6aab1e184f2e7f0cc"},"schema_version":"1.0"},"canonical_sha256":"8af86f3e1045d295f9beb0c6d7fcde4622387238fe78e103cc9b7c61bb217a02","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:45:41.917379Z","signature_b64":"Yf1tFzojAP4cVlTWTsI3q1hYZ/9ZSNlcsbY7vs07wyZJQZhqZMdD7MdM+jkS7UqOivxBcgROctnuOA9pBr00Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8af86f3e1045d295f9beb0c6d7fcde4622387238fe78e103cc9b7c61bb217a02","last_reissued_at":"2026-05-18T01:45:41.916750Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:45:41.916750Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1312.6882","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":"2026-05-18T01:45:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dtIQB0R0wrhaKDOdcIGil6pPd1YYiGYOk4dfPzTbD7ETDs7a++pBJ5iPxZINf9uV8t89BnIHGGu1F8DbxOybBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:30:07.728274Z"},"content_sha256":"47f6f838b8ce1ace65f2bef197ca8d778113e24e55605fd1610def7204e915c2","schema_version":"1.0","event_id":"sha256:47f6f838b8ce1ace65f2bef197ca8d778113e24e55605fd1610def7204e915c2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:RL4G6PQQIXJJL6N6WDDNP7G6IY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of Class I Methanol (CH3OH) Maser Candidates in Supernova Remnants","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"B.C. McEwen, D.A. Frail, L.O. Sjouwerman, M.J. Claussen, R.A. Mesler, Y.M. Pihlstr\\\"om","submitted_at":"2013-12-24T19:44:29Z","abstract_excerpt":"We have used the Karl G. Jansky Very Large Array (VLA) to search for 36 GHz and 44 GHz methanol (CH3OH) lines in a sample of 21 Galactic supernova remnants (SNRs). Mainly the regions of the SNRs with 1720 MHz OH masers were observed. Despite the limited spatial extent covered in our search, methanol masers were detected in both G1.4-0.1 and W28. Additional masers were found in SgrAEast. More than 40 masers were found in G1.4-0.1 which we deduce are due to interactions between the SNR and at least two separate molecular clouds. The six masers in W28 are associated with the molecular cloud that "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.6882","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":"2026-05-18T01:45:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZA8qHhc4Kl+xC1DpAaMwQi9vBAb6/08WQBcAkpKYsFQfODfpxlkYDygsGWTYg2sONJNgdZQ29fNPfTTL9dCcBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:30:07.728645Z"},"content_sha256":"415ea2a10345e424b0bd3c7b992ddf754f84efd138404f81ef0b7a080ba85871","schema_version":"1.0","event_id":"sha256:415ea2a10345e424b0bd3c7b992ddf754f84efd138404f81ef0b7a080ba85871"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RL4G6PQQIXJJL6N6WDDNP7G6IY/bundle.json","state_url":"https://pith.science/pith/RL4G6PQQIXJJL6N6WDDNP7G6IY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RL4G6PQQIXJJL6N6WDDNP7G6IY/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":"2026-06-02T23:30:07Z","links":{"resolver":"https://pith.science/pith/RL4G6PQQIXJJL6N6WDDNP7G6IY","bundle":"https://pith.science/pith/RL4G6PQQIXJJL6N6WDDNP7G6IY/bundle.json","state":"https://pith.science/pith/RL4G6PQQIXJJL6N6WDDNP7G6IY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RL4G6PQQIXJJL6N6WDDNP7G6IY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:RL4G6PQQIXJJL6N6WDDNP7G6IY","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":"991af2c178bba2d58b5d3870d12ccc77b4a86f5c7dea01e6aab1e184f2e7f0cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-24T19:44:29Z","title_canon_sha256":"90581633808afa7756314c47c80c4aa84a965ed77b96484cce7a1ad341ffbf8b"},"schema_version":"1.0","source":{"id":"1312.6882","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.6882","created_at":"2026-05-18T01:45:41Z"},{"alias_kind":"arxiv_version","alias_value":"1312.6882v1","created_at":"2026-05-18T01:45:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.6882","created_at":"2026-05-18T01:45:41Z"},{"alias_kind":"pith_short_12","alias_value":"RL4G6PQQIXJJ","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"RL4G6PQQIXJJL6N6","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"RL4G6PQQ","created_at":"2026-05-18T12:27:57Z"}],"graph_snapshots":[{"event_id":"sha256:415ea2a10345e424b0bd3c7b992ddf754f84efd138404f81ef0b7a080ba85871","target":"graph","created_at":"2026-05-18T01:45:41Z","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 have used the Karl G. Jansky Very Large Array (VLA) to search for 36 GHz and 44 GHz methanol (CH3OH) lines in a sample of 21 Galactic supernova remnants (SNRs). Mainly the regions of the SNRs with 1720 MHz OH masers were observed. Despite the limited spatial extent covered in our search, methanol masers were detected in both G1.4-0.1 and W28. Additional masers were found in SgrAEast. More than 40 masers were found in G1.4-0.1 which we deduce are due to interactions between the SNR and at least two separate molecular clouds. The six masers in W28 are associated with the molecular cloud that ","authors_text":"B.C. McEwen, D.A. Frail, L.O. Sjouwerman, M.J. Claussen, R.A. Mesler, Y.M. Pihlstr\\\"om","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-24T19:44:29Z","title":"Detection of Class I Methanol (CH3OH) Maser Candidates in Supernova Remnants"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.6882","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":"sha256:47f6f838b8ce1ace65f2bef197ca8d778113e24e55605fd1610def7204e915c2","target":"record","created_at":"2026-05-18T01:45:41Z","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":"991af2c178bba2d58b5d3870d12ccc77b4a86f5c7dea01e6aab1e184f2e7f0cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-24T19:44:29Z","title_canon_sha256":"90581633808afa7756314c47c80c4aa84a965ed77b96484cce7a1ad341ffbf8b"},"schema_version":"1.0","source":{"id":"1312.6882","kind":"arxiv","version":1}},"canonical_sha256":"8af86f3e1045d295f9beb0c6d7fcde4622387238fe78e103cc9b7c61bb217a02","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8af86f3e1045d295f9beb0c6d7fcde4622387238fe78e103cc9b7c61bb217a02","first_computed_at":"2026-05-18T01:45:41.916750Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:41.916750Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Yf1tFzojAP4cVlTWTsI3q1hYZ/9ZSNlcsbY7vs07wyZJQZhqZMdD7MdM+jkS7UqOivxBcgROctnuOA9pBr00Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:41.917379Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.6882","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:47f6f838b8ce1ace65f2bef197ca8d778113e24e55605fd1610def7204e915c2","sha256:415ea2a10345e424b0bd3c7b992ddf754f84efd138404f81ef0b7a080ba85871"],"state_sha256":"3c654ade921bb54c1022e84aa968ef1e59125f7a31badf6a4421f4dd0a5a4b0e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jJhkkRXp5QL6TUfyx+h04o4td+9SrxI1kQwcrM4v0TZ4XL/BH6dpwTInqIiKBXZJ62iWy49b0pMM8IebGQBACw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:30:07.730672Z","bundle_sha256":"6f62e5e49df7f2a04cf35d80fc91d9612cf75e35d6cef2a8665fd16f194543d5"}}