{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:YQCO3YDMUBBL6EYX6FYJOSQHR6","short_pith_number":"pith:YQCO3YDM","canonical_record":{"source":{"id":"1505.06421","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-05-24T09:35:25Z","cross_cats_sorted":[],"title_canon_sha256":"75e2aea6a35d1bea92f994ee01cf448edb3ac6d903dd9ca365e29d2d5fde8edc","abstract_canon_sha256":"c32c75d15c11b4b6c206974c7ad918fefd4508fa3008422bef1e803b1f6daae4"},"schema_version":"1.0"},"canonical_sha256":"c404ede06ca042bf1317f170974a078fb16fe447bcffc16006a744e26f876e21","source":{"kind":"arxiv","id":"1505.06421","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.06421","created_at":"2026-05-18T01:29:45Z"},{"alias_kind":"arxiv_version","alias_value":"1505.06421v2","created_at":"2026-05-18T01:29:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.06421","created_at":"2026-05-18T01:29:45Z"},{"alias_kind":"pith_short_12","alias_value":"YQCO3YDMUBBL","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"YQCO3YDMUBBL6EYX","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"YQCO3YDM","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:YQCO3YDMUBBL6EYX6FYJOSQHR6","target":"record","payload":{"canonical_record":{"source":{"id":"1505.06421","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-05-24T09:35:25Z","cross_cats_sorted":[],"title_canon_sha256":"75e2aea6a35d1bea92f994ee01cf448edb3ac6d903dd9ca365e29d2d5fde8edc","abstract_canon_sha256":"c32c75d15c11b4b6c206974c7ad918fefd4508fa3008422bef1e803b1f6daae4"},"schema_version":"1.0"},"canonical_sha256":"c404ede06ca042bf1317f170974a078fb16fe447bcffc16006a744e26f876e21","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:29:45.937966Z","signature_b64":"6sb5N9HVbLnNQN1oJ9gm3lMcfMOJ/FcMAQOw3aFYdqE3M0hSduLXh5aSCL424Wc9+/xyxddDpnzD+qkeQsXcAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c404ede06ca042bf1317f170974a078fb16fe447bcffc16006a744e26f876e21","last_reissued_at":"2026-05-18T01:29:45.937370Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:29:45.937370Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.06421","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":"2026-05-18T01:29:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fdOihK7Geiofscs02VW8h1yGgpP0M1NVmhUGNwF3QdekyltqeLR0BkKfBfKs6Lg0A8xDk6zNR8ethPY+/TSCAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:27:15.387736Z"},"content_sha256":"46116e718d713e3ca25a3d67f9418d545566af0aff25a26de1d0564ba04af5f3","schema_version":"1.0","event_id":"sha256:46116e718d713e3ca25a3d67f9418d545566af0aff25a26de1d0564ba04af5f3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:YQCO3YDMUBBL6EYX6FYJOSQHR6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HDFITS: porting the FITS data model to HDF5","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"B. R. Barsdell, D. C. Price, L. J. Greenhill","submitted_at":"2015-05-24T09:35:25Z","abstract_excerpt":"The FITS (Flexible Image Transport System) data format has been the de facto data format for astronomy-related data products since its inception in the late 1970s. While the FITS file format is widely supported, it lacks many of the features of more modern data serialization, such as the Hierarchical Data Format (HDF5). The HDF5 file format offers considerable advantages over FITS, such as improved I/O speed and compression, but has yet to gain widespread adoption within astronomy. One of the major holdbacks is that HDF5 is not well supported by data reduction software packages and image viewe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.06421","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":"2026-05-18T01:29:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RdMST9XNVNWk2Jl7Yz8KOP0K0K7bBIyHuPXq/jaHUrKzg1OHSCb+5+p6i+LrXtpWKm0Dqw8u57kou3tzReAaBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:27:15.388084Z"},"content_sha256":"5e802f46cbe82b5fa69546085b7254d6ee10babfe769ceedff910fa58653440f","schema_version":"1.0","event_id":"sha256:5e802f46cbe82b5fa69546085b7254d6ee10babfe769ceedff910fa58653440f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YQCO3YDMUBBL6EYX6FYJOSQHR6/bundle.json","state_url":"https://pith.science/pith/YQCO3YDMUBBL6EYX6FYJOSQHR6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YQCO3YDMUBBL6EYX6FYJOSQHR6/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":"2026-06-02T11:27:15Z","links":{"resolver":"https://pith.science/pith/YQCO3YDMUBBL6EYX6FYJOSQHR6","bundle":"https://pith.science/pith/YQCO3YDMUBBL6EYX6FYJOSQHR6/bundle.json","state":"https://pith.science/pith/YQCO3YDMUBBL6EYX6FYJOSQHR6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YQCO3YDMUBBL6EYX6FYJOSQHR6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:YQCO3YDMUBBL6EYX6FYJOSQHR6","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":"c32c75d15c11b4b6c206974c7ad918fefd4508fa3008422bef1e803b1f6daae4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-05-24T09:35:25Z","title_canon_sha256":"75e2aea6a35d1bea92f994ee01cf448edb3ac6d903dd9ca365e29d2d5fde8edc"},"schema_version":"1.0","source":{"id":"1505.06421","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.06421","created_at":"2026-05-18T01:29:45Z"},{"alias_kind":"arxiv_version","alias_value":"1505.06421v2","created_at":"2026-05-18T01:29:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.06421","created_at":"2026-05-18T01:29:45Z"},{"alias_kind":"pith_short_12","alias_value":"YQCO3YDMUBBL","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"YQCO3YDMUBBL6EYX","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"YQCO3YDM","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:5e802f46cbe82b5fa69546085b7254d6ee10babfe769ceedff910fa58653440f","target":"graph","created_at":"2026-05-18T01:29:45Z","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 FITS (Flexible Image Transport System) data format has been the de facto data format for astronomy-related data products since its inception in the late 1970s. While the FITS file format is widely supported, it lacks many of the features of more modern data serialization, such as the Hierarchical Data Format (HDF5). The HDF5 file format offers considerable advantages over FITS, such as improved I/O speed and compression, but has yet to gain widespread adoption within astronomy. One of the major holdbacks is that HDF5 is not well supported by data reduction software packages and image viewe","authors_text":"B. R. Barsdell, D. C. Price, L. J. Greenhill","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-05-24T09:35:25Z","title":"HDFITS: porting the FITS data model to HDF5"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.06421","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":"sha256:46116e718d713e3ca25a3d67f9418d545566af0aff25a26de1d0564ba04af5f3","target":"record","created_at":"2026-05-18T01:29:45Z","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":"c32c75d15c11b4b6c206974c7ad918fefd4508fa3008422bef1e803b1f6daae4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-05-24T09:35:25Z","title_canon_sha256":"75e2aea6a35d1bea92f994ee01cf448edb3ac6d903dd9ca365e29d2d5fde8edc"},"schema_version":"1.0","source":{"id":"1505.06421","kind":"arxiv","version":2}},"canonical_sha256":"c404ede06ca042bf1317f170974a078fb16fe447bcffc16006a744e26f876e21","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c404ede06ca042bf1317f170974a078fb16fe447bcffc16006a744e26f876e21","first_computed_at":"2026-05-18T01:29:45.937370Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:29:45.937370Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6sb5N9HVbLnNQN1oJ9gm3lMcfMOJ/FcMAQOw3aFYdqE3M0hSduLXh5aSCL424Wc9+/xyxddDpnzD+qkeQsXcAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:29:45.937966Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.06421","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:46116e718d713e3ca25a3d67f9418d545566af0aff25a26de1d0564ba04af5f3","sha256:5e802f46cbe82b5fa69546085b7254d6ee10babfe769ceedff910fa58653440f"],"state_sha256":"f580d2b07399dbc5a679b4451474d5237930d01ee1c171059620d013e5ed4ff4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rF/CAaq0a3xOObj8ZAr6jP9+/k5TQ8HwMDMn2yiptKoxQghYrEp+vG8IvDGa48rxuW0lAFE/Rp4sTvD047w/Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T11:27:15.390156Z","bundle_sha256":"f2d9b06da1635ea21078cbd4b4a0d512d78e06e487b4cd7aef37b279996f3e1a"}}