{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:DRBJ5XDSXDSTNZUFUBDV6ISWAS","short_pith_number":"pith:DRBJ5XDS","canonical_record":{"source":{"id":"1507.01011","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-03T20:02:26Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"a2059e4c85323f47e5cd8ddeb379b3aa8405f2e6ceee45574f79661436669d6b","abstract_canon_sha256":"f90bb21804156c85a4c47fbc129a3d7ee55fd53877d5ddd189dd857aeb6d4157"},"schema_version":"1.0"},"canonical_sha256":"1c429edc72b8e536e685a0475f225604b0139e6c5e7fad0610b9188064bac9bf","source":{"kind":"arxiv","id":"1507.01011","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01011","created_at":"2026-05-18T01:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01011v2","created_at":"2026-05-18T01:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01011","created_at":"2026-05-18T01:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"DRBJ5XDSXDST","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DRBJ5XDSXDSTNZUF","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DRBJ5XDS","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:DRBJ5XDSXDSTNZUFUBDV6ISWAS","target":"record","payload":{"canonical_record":{"source":{"id":"1507.01011","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-03T20:02:26Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"a2059e4c85323f47e5cd8ddeb379b3aa8405f2e6ceee45574f79661436669d6b","abstract_canon_sha256":"f90bb21804156c85a4c47fbc129a3d7ee55fd53877d5ddd189dd857aeb6d4157"},"schema_version":"1.0"},"canonical_sha256":"1c429edc72b8e536e685a0475f225604b0139e6c5e7fad0610b9188064bac9bf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:54.213110Z","signature_b64":"fZwF/ASw4uK7LtuGZjVJ0fsFsddAhEWXQ7sfCn/UfEMrr0T0s/55phKC0RsWZRmwyCMtTNDxnz5NyCNyNYJyCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c429edc72b8e536e685a0475f225604b0139e6c5e7fad0610b9188064bac9bf","last_reissued_at":"2026-05-18T01:24:54.212478Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:54.212478Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.01011","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":"2026-05-18T01:24:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D79uaAYUr1t14mzM0Nlc2PrMxDnqqW3rBG80pNpUOnPC2GTu3b1GJiaWgtU91WbkYCMIO8brXhFX/gmJB7pMCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:11:01.607163Z"},"content_sha256":"991cc0b212edf77a3b8f8c647288ace812a2d08b3ac63d132f7206f6fb3ced5a","schema_version":"1.0","event_id":"sha256:991cc0b212edf77a3b8f8c647288ace812a2d08b3ac63d132f7206f6fb3ced5a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:DRBJ5XDSXDSTNZUFUBDV6ISWAS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evidence for Rapid Variability in the Optical Light Curve of the Type Ia SN 2014J","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.SR","authors_text":"A.Z. Bonanos, Greece), National Observatory of Athens, P. Boumis (IAASARS","submitted_at":"2015-07-03T20:02:26Z","abstract_excerpt":"We present results of high-cadence monitoring of the optical light curve of the nearby, Type Ia SN 2014J in M82 using the 2.3m Aristarchos telescope. $B$ and $V$-band photometry on days 15-18 after $t_{max}(B)$, obtained with a cadence of 2 min per band, reveals evidence for rapid variability at the 0.02-0.05 mag level on timescales of 15-60 min on all four nights, taking the red noise estimation at face value. The decline slope was measured to be steeper in the $B$-band than in $V$-band, and to steadily decrease in both bands from 0.15 mag/day (night 1) to 0.04 mag/day (night 4) in V and from"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01011","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":"2026-05-18T01:24:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"alxAjkxghfXbnIQ735YoSrSsm+fgEdaUCCXhbtR61Za3G1FfW6kj9IiyIQR7NMOc6ThJjZkiYwb3NquN3dGRBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:11:01.607800Z"},"content_sha256":"6e1815adcb4fc49db0ae4532d8e3aa3b2e71af30b8fc949e4a8c15868d6dce31","schema_version":"1.0","event_id":"sha256:6e1815adcb4fc49db0ae4532d8e3aa3b2e71af30b8fc949e4a8c15868d6dce31"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DRBJ5XDSXDSTNZUFUBDV6ISWAS/bundle.json","state_url":"https://pith.science/pith/DRBJ5XDSXDSTNZUFUBDV6ISWAS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DRBJ5XDSXDSTNZUFUBDV6ISWAS/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":"2026-05-27T16:11:01Z","links":{"resolver":"https://pith.science/pith/DRBJ5XDSXDSTNZUFUBDV6ISWAS","bundle":"https://pith.science/pith/DRBJ5XDSXDSTNZUFUBDV6ISWAS/bundle.json","state":"https://pith.science/pith/DRBJ5XDSXDSTNZUFUBDV6ISWAS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DRBJ5XDSXDSTNZUFUBDV6ISWAS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:DRBJ5XDSXDSTNZUFUBDV6ISWAS","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":"f90bb21804156c85a4c47fbc129a3d7ee55fd53877d5ddd189dd857aeb6d4157","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-03T20:02:26Z","title_canon_sha256":"a2059e4c85323f47e5cd8ddeb379b3aa8405f2e6ceee45574f79661436669d6b"},"schema_version":"1.0","source":{"id":"1507.01011","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01011","created_at":"2026-05-18T01:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01011v2","created_at":"2026-05-18T01:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01011","created_at":"2026-05-18T01:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"DRBJ5XDSXDST","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DRBJ5XDSXDSTNZUF","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DRBJ5XDS","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:6e1815adcb4fc49db0ae4532d8e3aa3b2e71af30b8fc949e4a8c15868d6dce31","target":"graph","created_at":"2026-05-18T01:24:54Z","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 present results of high-cadence monitoring of the optical light curve of the nearby, Type Ia SN 2014J in M82 using the 2.3m Aristarchos telescope. $B$ and $V$-band photometry on days 15-18 after $t_{max}(B)$, obtained with a cadence of 2 min per band, reveals evidence for rapid variability at the 0.02-0.05 mag level on timescales of 15-60 min on all four nights, taking the red noise estimation at face value. The decline slope was measured to be steeper in the $B$-band than in $V$-band, and to steadily decrease in both bands from 0.15 mag/day (night 1) to 0.04 mag/day (night 4) in V and from","authors_text":"A.Z. Bonanos, Greece), National Observatory of Athens, P. Boumis (IAASARS","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-03T20:02:26Z","title":"Evidence for Rapid Variability in the Optical Light Curve of the Type Ia SN 2014J"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01011","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":"sha256:991cc0b212edf77a3b8f8c647288ace812a2d08b3ac63d132f7206f6fb3ced5a","target":"record","created_at":"2026-05-18T01:24:54Z","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":"f90bb21804156c85a4c47fbc129a3d7ee55fd53877d5ddd189dd857aeb6d4157","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-03T20:02:26Z","title_canon_sha256":"a2059e4c85323f47e5cd8ddeb379b3aa8405f2e6ceee45574f79661436669d6b"},"schema_version":"1.0","source":{"id":"1507.01011","kind":"arxiv","version":2}},"canonical_sha256":"1c429edc72b8e536e685a0475f225604b0139e6c5e7fad0610b9188064bac9bf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1c429edc72b8e536e685a0475f225604b0139e6c5e7fad0610b9188064bac9bf","first_computed_at":"2026-05-18T01:24:54.212478Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:54.212478Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fZwF/ASw4uK7LtuGZjVJ0fsFsddAhEWXQ7sfCn/UfEMrr0T0s/55phKC0RsWZRmwyCMtTNDxnz5NyCNyNYJyCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:54.213110Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.01011","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:991cc0b212edf77a3b8f8c647288ace812a2d08b3ac63d132f7206f6fb3ced5a","sha256:6e1815adcb4fc49db0ae4532d8e3aa3b2e71af30b8fc949e4a8c15868d6dce31"],"state_sha256":"663d3ce412079a178d4ae1b8902af37e2a6c8b3ce7d1b4f754ae5e57c94af2bf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2xUZJOPFbR4ON9iR9kFzYgRxPvpwoK11kfWbeG2c+U8i/chawP9hYVEp7BdbTVFxql5ERywa1udTLAaYsq0tCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T16:11:01.610830Z","bundle_sha256":"6ab07894f0f23f0372fcbcc3a4c467f5c215f5df57d1ccb945d1500685877256"}}