{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:6BINC53ZTUNASTPZFVVCEZDBGW","short_pith_number":"pith:6BINC53Z","canonical_record":{"source":{"id":"2608.06716","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-08-07T02:22:20Z","cross_cats_sorted":[],"title_canon_sha256":"516216e4dfae2bd5d6c92daa3b76974616363f0f8a49bd40c77a64ff9c410bb3","abstract_canon_sha256":"66af61b6fd74c585ba88e211894a63eda93133f35fa9d5703ac4ebe64d73cc81"},"schema_version":"1.0"},"canonical_sha256":"f050d177799d1a094df92d6a22646135a59ba31349000c43e7420b70a65ebabf","source":{"kind":"arxiv","id":"2608.06716","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.06716","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"arxiv_version","alias_value":"2608.06716v1","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.06716","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"pith_short_12","alias_value":"6BINC53ZTUNA","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"pith_short_16","alias_value":"6BINC53ZTUNASTPZ","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"pith_short_8","alias_value":"6BINC53Z","created_at":"2026-08-10T01:11:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:6BINC53ZTUNASTPZFVVCEZDBGW","target":"record","payload":{"canonical_record":{"source":{"id":"2608.06716","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-08-07T02:22:20Z","cross_cats_sorted":[],"title_canon_sha256":"516216e4dfae2bd5d6c92daa3b76974616363f0f8a49bd40c77a64ff9c410bb3","abstract_canon_sha256":"66af61b6fd74c585ba88e211894a63eda93133f35fa9d5703ac4ebe64d73cc81"},"schema_version":"1.0"},"canonical_sha256":"f050d177799d1a094df92d6a22646135a59ba31349000c43e7420b70a65ebabf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-10T01:11:48.378889Z","signature_b64":"U5o8B+wcHAtFRkLSUToQWjqL2rmevL8PA7u3pkefqwCKVX8U9DpMDdOKY4ls0xA//JXjQHldS+aewomeqsNLAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f050d177799d1a094df92d6a22646135a59ba31349000c43e7420b70a65ebabf","last_reissued_at":"2026-08-10T01:11:48.376429Z","signature_status":"signed_v1","first_computed_at":"2026-08-10T01:11:48.376429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.06716","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":"2026-08-10T01:11:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Drtw8uFaY+3Gv1mLXMPBoWGa8hPgBMv85wu4bFMioK743nJW5kwJQMvr7T0P/j4ci7t84HdLtBPRwTuJ600hAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T07:26:36.964509Z"},"content_sha256":"7795ce711fcd944b43f5fbfa1984ec00ea4ec902e1e45cfe6137587e5b5614c2","schema_version":"1.0","event_id":"sha256:7795ce711fcd944b43f5fbfa1984ec00ea4ec902e1e45cfe6137587e5b5614c2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:6BINC53ZTUNASTPZFVVCEZDBGW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Radio Constraints on the Circumstellar Environment of the Type IIb Supernova SN 2024iss","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Keiichi Maeda, Kenta Fujisawa, Kotaro Niinuma, Masanori Akimoto, Nozomu Tominaga, Takashi J. Moriya, Tomoki Matsuoka, Yoshinori Yonekura, Yuhei Iwata","submitted_at":"2026-08-07T02:22:20Z","abstract_excerpt":"Type~IIb supernovae exhibit diverse progenitor properties, and radio observations offer a unique probe of their mass-loss histories shortly before the explosion. We present Japanese VLBI Network single-baseline monitoring of the nearby Type IIb SN 2024iss at 6.9 and 8.4 GHz, spanning approximately one year after its discovery. Our radio observations have detected its emission at 10 and 23 days after the explosion, with subsequent epochs yielding non-detections. Based on the peak radio luminosity and peak time, SN 2024iss exhibits radio properties highly comparable to those of compact-envelope "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.06716","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2608.06716/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-08-10T01:11:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HdM7ZyHM/LAQrt/Ib6N9Q8b1l1fJ+RVjowyAp6V4wHt8lHQ25+1mHYldy2I0vdWtPLnK1fFoVSPWJyeeRDlRAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T07:26:36.965533Z"},"content_sha256":"c2f266fe21f66bc6c1d8ca228a4256a3e4bfc26a7b3c762be4a7604eac4b4c0f","schema_version":"1.0","event_id":"sha256:c2f266fe21f66bc6c1d8ca228a4256a3e4bfc26a7b3c762be4a7604eac4b4c0f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6BINC53ZTUNASTPZFVVCEZDBGW/bundle.json","state_url":"https://pith.science/pith/6BINC53ZTUNASTPZFVVCEZDBGW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6BINC53ZTUNASTPZFVVCEZDBGW/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":"2026-08-14T07:26:36Z","links":{"resolver":"https://pith.science/pith/6BINC53ZTUNASTPZFVVCEZDBGW","bundle":"https://pith.science/pith/6BINC53ZTUNASTPZFVVCEZDBGW/bundle.json","state":"https://pith.science/pith/6BINC53ZTUNASTPZFVVCEZDBGW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6BINC53ZTUNASTPZFVVCEZDBGW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:6BINC53ZTUNASTPZFVVCEZDBGW","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":"66af61b6fd74c585ba88e211894a63eda93133f35fa9d5703ac4ebe64d73cc81","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-08-07T02:22:20Z","title_canon_sha256":"516216e4dfae2bd5d6c92daa3b76974616363f0f8a49bd40c77a64ff9c410bb3"},"schema_version":"1.0","source":{"id":"2608.06716","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.06716","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"arxiv_version","alias_value":"2608.06716v1","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.06716","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"pith_short_12","alias_value":"6BINC53ZTUNA","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"pith_short_16","alias_value":"6BINC53ZTUNASTPZ","created_at":"2026-08-10T01:11:48Z"},{"alias_kind":"pith_short_8","alias_value":"6BINC53Z","created_at":"2026-08-10T01:11:48Z"}],"graph_snapshots":[{"event_id":"sha256:c2f266fe21f66bc6c1d8ca228a4256a3e4bfc26a7b3c762be4a7604eac4b4c0f","target":"graph","created_at":"2026-08-10T01:11:48Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2608.06716/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Type~IIb supernovae exhibit diverse progenitor properties, and radio observations offer a unique probe of their mass-loss histories shortly before the explosion. We present Japanese VLBI Network single-baseline monitoring of the nearby Type IIb SN 2024iss at 6.9 and 8.4 GHz, spanning approximately one year after its discovery. Our radio observations have detected its emission at 10 and 23 days after the explosion, with subsequent epochs yielding non-detections. Based on the peak radio luminosity and peak time, SN 2024iss exhibits radio properties highly comparable to those of compact-envelope ","authors_text":"Keiichi Maeda, Kenta Fujisawa, Kotaro Niinuma, Masanori Akimoto, Nozomu Tominaga, Takashi J. Moriya, Tomoki Matsuoka, Yoshinori Yonekura, Yuhei Iwata","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-08-07T02:22:20Z","title":"Radio Constraints on the Circumstellar Environment of the Type IIb Supernova SN 2024iss"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.06716","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":"sha256:7795ce711fcd944b43f5fbfa1984ec00ea4ec902e1e45cfe6137587e5b5614c2","target":"record","created_at":"2026-08-10T01:11:48Z","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":"66af61b6fd74c585ba88e211894a63eda93133f35fa9d5703ac4ebe64d73cc81","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-08-07T02:22:20Z","title_canon_sha256":"516216e4dfae2bd5d6c92daa3b76974616363f0f8a49bd40c77a64ff9c410bb3"},"schema_version":"1.0","source":{"id":"2608.06716","kind":"arxiv","version":1}},"canonical_sha256":"f050d177799d1a094df92d6a22646135a59ba31349000c43e7420b70a65ebabf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f050d177799d1a094df92d6a22646135a59ba31349000c43e7420b70a65ebabf","first_computed_at":"2026-08-10T01:11:48.376429Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-10T01:11:48.376429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U5o8B+wcHAtFRkLSUToQWjqL2rmevL8PA7u3pkefqwCKVX8U9DpMDdOKY4ls0xA//JXjQHldS+aewomeqsNLAw==","signature_status":"signed_v1","signed_at":"2026-08-10T01:11:48.378889Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.06716","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7795ce711fcd944b43f5fbfa1984ec00ea4ec902e1e45cfe6137587e5b5614c2","sha256:c2f266fe21f66bc6c1d8ca228a4256a3e4bfc26a7b3c762be4a7604eac4b4c0f"],"state_sha256":"5c1bd2fb0b7ffccae65f1022baeadf693ded160b0ab0e93599a26e9b1a322763"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YEdgRb+ICqNNvMyEI0wC7KYjCRtFF/xCsGz+eVB1KdKoN6yWsQvd3xP3n+SGoXVJ281UBXrfsWsz0GXxjzjOAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T07:26:36.970823Z","bundle_sha256":"3637b233d19536b34693191fec41a1b11e92f7e1b61b0a9391c862877f2c3b50"}}