{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:IAOU5EDIHQASTCP2SAZKG2LWH6","short_pith_number":"pith:IAOU5EDI","canonical_record":{"source":{"id":"2507.16408","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-22T09:58:34Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"0b549221db7ed101829dd1edff5913a235c57fa63a1a375a4a1115eeeb871ae7","abstract_canon_sha256":"ac07fec28673a37e97c7f3a6222249b2056d33205d8de8b4b360832befe28751"},"schema_version":"1.0"},"canonical_sha256":"401d4e90683c012989fa9032a369763fad7878ff9e5ef0cb303dd773562e5280","source":{"kind":"arxiv","id":"2507.16408","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.16408","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"arxiv_version","alias_value":"2507.16408v1","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.16408","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"pith_short_12","alias_value":"IAOU5EDIHQAS","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"pith_short_16","alias_value":"IAOU5EDIHQASTCP2","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"pith_short_8","alias_value":"IAOU5EDI","created_at":"2026-07-05T11:41:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:IAOU5EDIHQASTCP2SAZKG2LWH6","target":"record","payload":{"canonical_record":{"source":{"id":"2507.16408","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-22T09:58:34Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"0b549221db7ed101829dd1edff5913a235c57fa63a1a375a4a1115eeeb871ae7","abstract_canon_sha256":"ac07fec28673a37e97c7f3a6222249b2056d33205d8de8b4b360832befe28751"},"schema_version":"1.0"},"canonical_sha256":"401d4e90683c012989fa9032a369763fad7878ff9e5ef0cb303dd773562e5280","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:41:08.842152Z","signature_b64":"ov3j9GnSBkB1U3w9aQlOOEjjL5DvuyJxvMvbdR7zyxPr1DntICxrSP2u8RFZ7Iz3Y5SXPsAoau1hT4508/8UDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"401d4e90683c012989fa9032a369763fad7878ff9e5ef0cb303dd773562e5280","last_reissued_at":"2026-07-05T11:41:08.841766Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:41:08.841766Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.16408","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":"2026-07-05T11:41:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Avl1sXAoHQkCbaEJ4SDyCrJQ2ee+GSeasF9kD2ZmSToFNW2Ln6rbBNNry74FNqlTqKM5w+chTewX22A+PXgZBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:10:30.431527Z"},"content_sha256":"fa18e97d3c71fbe697a4f792352d5d8d1f78870dfab9cc7667dab3232e2504fb","schema_version":"1.0","event_id":"sha256:fa18e97d3c71fbe697a4f792352d5d8d1f78870dfab9cc7667dab3232e2504fb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:IAOU5EDIHQASTCP2SAZKG2LWH6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of VER J2019+368 with the SST-1M stereoscopic system","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.HE","authors_text":"Ana Laura M\\\"uller (for the SST-1M Collaboration), Jakub Jury\\v{s}ek, Thomas Tavernier","submitted_at":"2025-07-22T09:58:34Z","abstract_excerpt":"The Single-Mirror Small Size Telescope (SST-1M) is a small Cherenkov telescope designed to detect gamma rays with energies more than about 1 TeV. The optical design of the SST-1M follows the Davies-Cotton concept to ensure good off-axis performance. In 2022, two SST-1M telescope prototypes were installed in Ondrejov, Czech Republic, and stereoscopic observations of astrophysical gamma-ray sources have been performed since then. VER J2019+368 is an unidentified very-high-energy (VHE) gamma-ray source, surrounded by several gamma-ray point-like and diffuse sources, together with their multi-wave"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.16408","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/2507.16408/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":"2026-07-05T11:41:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D3eTl8DFkQUYztOd6kHRHLoCQrEcxlDA6zLlMMbeuYgBmZY7K5zsIJjKdlMqRZVvsKu/UbpyoAuMm89oRQqoDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:10:30.432157Z"},"content_sha256":"609d6d24ed3e60ae2ffab8f232c4286d490fea0cda8ff5c4cdb3ee4d629ddebf","schema_version":"1.0","event_id":"sha256:609d6d24ed3e60ae2ffab8f232c4286d490fea0cda8ff5c4cdb3ee4d629ddebf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IAOU5EDIHQASTCP2SAZKG2LWH6/bundle.json","state_url":"https://pith.science/pith/IAOU5EDIHQASTCP2SAZKG2LWH6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IAOU5EDIHQASTCP2SAZKG2LWH6/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":"2026-08-07T06:10:30Z","links":{"resolver":"https://pith.science/pith/IAOU5EDIHQASTCP2SAZKG2LWH6","bundle":"https://pith.science/pith/IAOU5EDIHQASTCP2SAZKG2LWH6/bundle.json","state":"https://pith.science/pith/IAOU5EDIHQASTCP2SAZKG2LWH6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IAOU5EDIHQASTCP2SAZKG2LWH6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:IAOU5EDIHQASTCP2SAZKG2LWH6","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":"ac07fec28673a37e97c7f3a6222249b2056d33205d8de8b4b360832befe28751","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-22T09:58:34Z","title_canon_sha256":"0b549221db7ed101829dd1edff5913a235c57fa63a1a375a4a1115eeeb871ae7"},"schema_version":"1.0","source":{"id":"2507.16408","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.16408","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"arxiv_version","alias_value":"2507.16408v1","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.16408","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"pith_short_12","alias_value":"IAOU5EDIHQAS","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"pith_short_16","alias_value":"IAOU5EDIHQASTCP2","created_at":"2026-07-05T11:41:08Z"},{"alias_kind":"pith_short_8","alias_value":"IAOU5EDI","created_at":"2026-07-05T11:41:08Z"}],"graph_snapshots":[{"event_id":"sha256:609d6d24ed3e60ae2ffab8f232c4286d490fea0cda8ff5c4cdb3ee4d629ddebf","target":"graph","created_at":"2026-07-05T11:41:08Z","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/2507.16408/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Single-Mirror Small Size Telescope (SST-1M) is a small Cherenkov telescope designed to detect gamma rays with energies more than about 1 TeV. The optical design of the SST-1M follows the Davies-Cotton concept to ensure good off-axis performance. In 2022, two SST-1M telescope prototypes were installed in Ondrejov, Czech Republic, and stereoscopic observations of astrophysical gamma-ray sources have been performed since then. VER J2019+368 is an unidentified very-high-energy (VHE) gamma-ray source, surrounded by several gamma-ray point-like and diffuse sources, together with their multi-wave","authors_text":"Ana Laura M\\\"uller (for the SST-1M Collaboration), Jakub Jury\\v{s}ek, Thomas Tavernier","cross_cats":["astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-22T09:58:34Z","title":"Observation of VER J2019+368 with the SST-1M stereoscopic system"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.16408","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:fa18e97d3c71fbe697a4f792352d5d8d1f78870dfab9cc7667dab3232e2504fb","target":"record","created_at":"2026-07-05T11:41:08Z","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":"ac07fec28673a37e97c7f3a6222249b2056d33205d8de8b4b360832befe28751","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-22T09:58:34Z","title_canon_sha256":"0b549221db7ed101829dd1edff5913a235c57fa63a1a375a4a1115eeeb871ae7"},"schema_version":"1.0","source":{"id":"2507.16408","kind":"arxiv","version":1}},"canonical_sha256":"401d4e90683c012989fa9032a369763fad7878ff9e5ef0cb303dd773562e5280","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"401d4e90683c012989fa9032a369763fad7878ff9e5ef0cb303dd773562e5280","first_computed_at":"2026-07-05T11:41:08.841766Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:41:08.841766Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ov3j9GnSBkB1U3w9aQlOOEjjL5DvuyJxvMvbdR7zyxPr1DntICxrSP2u8RFZ7Iz3Y5SXPsAoau1hT4508/8UDw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:41:08.842152Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.16408","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fa18e97d3c71fbe697a4f792352d5d8d1f78870dfab9cc7667dab3232e2504fb","sha256:609d6d24ed3e60ae2ffab8f232c4286d490fea0cda8ff5c4cdb3ee4d629ddebf"],"state_sha256":"64f05fb8965e3781be9293bc097fc1f7a3ca34eb6688de867bea894ebb864c9c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M40JJbUl/MflAHO81NwbShlUeZod5++2TqxLXNE0yatynmERXWPb6u5QaMd8kz3PQD3WNEziuqS0WwIC4vGHBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T06:10:30.438963Z","bundle_sha256":"2c78c89c0eb8596b31b2d2822d5650aee7f74497b71bb5aafece453423dd61f3"}}