{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:X3MPBCFJRTDJC3LONNBN3QDW5D","short_pith_number":"pith:X3MPBCFJ","canonical_record":{"source":{"id":"1602.01148","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-02T23:05:22Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"4f1752d27258283ad41439e2d460a31070d8560ad07ca87465dec7fbf96d10f4","abstract_canon_sha256":"961382256ce327dbe0fcca705c9c9182c79f512f8eaf5521cdaf81ae3d5e2c4a"},"schema_version":"1.0"},"canonical_sha256":"bed8f088a98cc6916d6e6b42ddc076e8e935c50bc97de28b9e8ffbdf935dab05","source":{"kind":"arxiv","id":"1602.01148","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.01148","created_at":"2026-05-18T01:21:03Z"},{"alias_kind":"arxiv_version","alias_value":"1602.01148v1","created_at":"2026-05-18T01:21:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.01148","created_at":"2026-05-18T01:21:03Z"},{"alias_kind":"pith_short_12","alias_value":"X3MPBCFJRTDJ","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"X3MPBCFJRTDJC3LO","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"X3MPBCFJ","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:X3MPBCFJRTDJC3LONNBN3QDW5D","target":"record","payload":{"canonical_record":{"source":{"id":"1602.01148","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-02T23:05:22Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"4f1752d27258283ad41439e2d460a31070d8560ad07ca87465dec7fbf96d10f4","abstract_canon_sha256":"961382256ce327dbe0fcca705c9c9182c79f512f8eaf5521cdaf81ae3d5e2c4a"},"schema_version":"1.0"},"canonical_sha256":"bed8f088a98cc6916d6e6b42ddc076e8e935c50bc97de28b9e8ffbdf935dab05","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:03.796459Z","signature_b64":"8MhKmju/DN7oqWXGYtVHV6Tm8jf0ddjJSUt0UtJ/wKkuQbcXHL1lFCpI/KoasXMrAqDLJy7jmIyFPdskKhRNAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bed8f088a98cc6916d6e6b42ddc076e8e935c50bc97de28b9e8ffbdf935dab05","last_reissued_at":"2026-05-18T01:21:03.795772Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:03.795772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.01148","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":"2026-05-18T01:21:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MiMEhoSKCxLYLVZhZnySoBW73isYCS+Boql4Yj05MEUMWtvKdemDdv/11MyfTjmvZNYabRyPzmmrLiYxKUC9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:02:33.038384Z"},"content_sha256":"eb51baa6f6fe0c0b4a0a49a0fb89326cf5873fef318508348724e7b70861570c","schema_version":"1.0","event_id":"sha256:eb51baa6f6fe0c0b4a0a49a0fb89326cf5873fef318508348724e7b70861570c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:X3MPBCFJRTDJC3LONNBN3QDW5D","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Eta Carinae's Thermal X-ray Tail Measured with XMM-Newton and NuSTAR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Anthony F. J. Moffat, Brian W. Grefenstette, Christopher M. P. Russell, Hiromitsu Takahashi, Jose Groh, Julian M. Pittard, Kenji Hamaguchi, Martin Stuhlinger, Michael F. Corcoran, Neetika Sharma, Noel D. Richardson, Stanley Owocki, Takayuki Yuasa, Theodore R. Gull, Thomas I. Madura","submitted_at":"2016-02-02T23:05:22Z","abstract_excerpt":"The evolved, massive highly eccentric binary system, eta Carinae, underwent a periastron passage in the summer of 2014. We obtained two coordinated X-ray observations with XMM-Newton and NuSTAR during the elevated X-ray flux state and just before the X-ray minimum flux state around this passage. These NuSTAR observations clearly detected X-ray emission associated with eta Car extending up to ~50 keV for the first time. The NuSTAR spectrum above 10 keV can be fit with the bremsstrahlung tail from a kT ~6 keV plasma. This temperature is Delta kT ~2 keV higher than those measured from the iron K "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.01148","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":"2026-05-18T01:21:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"joqH7EsUNlk3plYNz0WmzMa79TDnjHCAOWMmdJG6i/2LnWaOr4R/fEDRSHXQ9nnVhXrQQ+ysmqMT7SNrAL5kBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:02:33.039098Z"},"content_sha256":"96644fadb59cd3de8240e80fa0538ea7e5e8536977861e641583757792017ca6","schema_version":"1.0","event_id":"sha256:96644fadb59cd3de8240e80fa0538ea7e5e8536977861e641583757792017ca6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X3MPBCFJRTDJC3LONNBN3QDW5D/bundle.json","state_url":"https://pith.science/pith/X3MPBCFJRTDJC3LONNBN3QDW5D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X3MPBCFJRTDJC3LONNBN3QDW5D/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":"2026-05-28T23:02:33Z","links":{"resolver":"https://pith.science/pith/X3MPBCFJRTDJC3LONNBN3QDW5D","bundle":"https://pith.science/pith/X3MPBCFJRTDJC3LONNBN3QDW5D/bundle.json","state":"https://pith.science/pith/X3MPBCFJRTDJC3LONNBN3QDW5D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X3MPBCFJRTDJC3LONNBN3QDW5D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:X3MPBCFJRTDJC3LONNBN3QDW5D","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":"961382256ce327dbe0fcca705c9c9182c79f512f8eaf5521cdaf81ae3d5e2c4a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-02T23:05:22Z","title_canon_sha256":"4f1752d27258283ad41439e2d460a31070d8560ad07ca87465dec7fbf96d10f4"},"schema_version":"1.0","source":{"id":"1602.01148","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.01148","created_at":"2026-05-18T01:21:03Z"},{"alias_kind":"arxiv_version","alias_value":"1602.01148v1","created_at":"2026-05-18T01:21:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.01148","created_at":"2026-05-18T01:21:03Z"},{"alias_kind":"pith_short_12","alias_value":"X3MPBCFJRTDJ","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"X3MPBCFJRTDJC3LO","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"X3MPBCFJ","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:96644fadb59cd3de8240e80fa0538ea7e5e8536977861e641583757792017ca6","target":"graph","created_at":"2026-05-18T01:21:03Z","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 evolved, massive highly eccentric binary system, eta Carinae, underwent a periastron passage in the summer of 2014. We obtained two coordinated X-ray observations with XMM-Newton and NuSTAR during the elevated X-ray flux state and just before the X-ray minimum flux state around this passage. These NuSTAR observations clearly detected X-ray emission associated with eta Car extending up to ~50 keV for the first time. The NuSTAR spectrum above 10 keV can be fit with the bremsstrahlung tail from a kT ~6 keV plasma. This temperature is Delta kT ~2 keV higher than those measured from the iron K ","authors_text":"Anthony F. J. Moffat, Brian W. Grefenstette, Christopher M. P. Russell, Hiromitsu Takahashi, Jose Groh, Julian M. Pittard, Kenji Hamaguchi, Martin Stuhlinger, Michael F. Corcoran, Neetika Sharma, Noel D. Richardson, Stanley Owocki, Takayuki Yuasa, Theodore R. Gull, Thomas I. Madura","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-02T23:05:22Z","title":"Eta Carinae's Thermal X-ray Tail Measured with XMM-Newton and NuSTAR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.01148","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:eb51baa6f6fe0c0b4a0a49a0fb89326cf5873fef318508348724e7b70861570c","target":"record","created_at":"2026-05-18T01:21:03Z","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":"961382256ce327dbe0fcca705c9c9182c79f512f8eaf5521cdaf81ae3d5e2c4a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-02T23:05:22Z","title_canon_sha256":"4f1752d27258283ad41439e2d460a31070d8560ad07ca87465dec7fbf96d10f4"},"schema_version":"1.0","source":{"id":"1602.01148","kind":"arxiv","version":1}},"canonical_sha256":"bed8f088a98cc6916d6e6b42ddc076e8e935c50bc97de28b9e8ffbdf935dab05","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bed8f088a98cc6916d6e6b42ddc076e8e935c50bc97de28b9e8ffbdf935dab05","first_computed_at":"2026-05-18T01:21:03.795772Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:21:03.795772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8MhKmju/DN7oqWXGYtVHV6Tm8jf0ddjJSUt0UtJ/wKkuQbcXHL1lFCpI/KoasXMrAqDLJy7jmIyFPdskKhRNAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:21:03.796459Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.01148","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb51baa6f6fe0c0b4a0a49a0fb89326cf5873fef318508348724e7b70861570c","sha256:96644fadb59cd3de8240e80fa0538ea7e5e8536977861e641583757792017ca6"],"state_sha256":"fa8fb51034b9f7924abff18bb43c2e1a2d471ab3f7aa4105b1c3e760fe105ade"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nTpcjiHgX/yhsi1j1ZkbAQI34DPne7CwYPPnNUNcx6CwSoYbuV8kGBYD+k0fbYv4sksnyol6cE/OqOKPbKh0BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T23:02:33.042878Z","bundle_sha256":"b4d39cd0000c1d86762a37bc1335c1b5043be31c7456129b3c7b48c1f85303d8"}}