{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:2LQXNHB764RKZ56WDISEDAGC4H","short_pith_number":"pith:2LQXNHB7","canonical_record":{"source":{"id":"1009.6031","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-09-30T02:28:18Z","cross_cats_sorted":[],"title_canon_sha256":"9c2e1c1e23d54e74877f4935cabf5406021ef6913465b4bddd0c711b2a1fe596","abstract_canon_sha256":"4d54b8ec8669568cb5c0ab3a6ddc0245f9c1827a6aaef8a53c20dc8b4e5e3f8c"},"schema_version":"1.0"},"canonical_sha256":"d2e1769c3ff722acf7d61a244180c2e1d931b71aaccc11e3bb8c7ee455ad441d","source":{"kind":"arxiv","id":"1009.6031","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.6031","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"arxiv_version","alias_value":"1009.6031v1","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.6031","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"pith_short_12","alias_value":"2LQXNHB764RK","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"2LQXNHB764RKZ56W","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"2LQXNHB7","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:2LQXNHB764RKZ56WDISEDAGC4H","target":"record","payload":{"canonical_record":{"source":{"id":"1009.6031","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-09-30T02:28:18Z","cross_cats_sorted":[],"title_canon_sha256":"9c2e1c1e23d54e74877f4935cabf5406021ef6913465b4bddd0c711b2a1fe596","abstract_canon_sha256":"4d54b8ec8669568cb5c0ab3a6ddc0245f9c1827a6aaef8a53c20dc8b4e5e3f8c"},"schema_version":"1.0"},"canonical_sha256":"d2e1769c3ff722acf7d61a244180c2e1d931b71aaccc11e3bb8c7ee455ad441d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:05:13.269826Z","signature_b64":"sid0TxIVvzR2pMLqKtrMAwRI9fVtMOaDC6e3q4jqZteNgx7o65vUqDYvvUU/KlUHd2L5zbFBim/m/AnYVhJIBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2e1769c3ff722acf7d61a244180c2e1d931b71aaccc11e3bb8c7ee455ad441d","last_reissued_at":"2026-05-18T02:05:13.269190Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:05:13.269190Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1009.6031","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":"2026-05-18T02:05:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B6M69M+duEDR5I5I+aDU7/Tl6gfiZ/q61NX1X4miqi8LmuV6lDXjsJZ7cChb73INrzzFnPeChs7Xqb7+uN0+Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:17:50.789078Z"},"content_sha256":"417df486ef43c5535522d734d90d6d3756efabd7dc74bbd5d0fbd7224840593e","schema_version":"1.0","event_id":"sha256:417df486ef43c5535522d734d90d6d3756efabd7dc74bbd5d0fbd7224840593e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:2LQXNHB764RKZ56WDISEDAGC4H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Expansion Velocity of Ejecta in Tycho's Supernova Remnant Measured by Doppler Broadened X-ray Line Emission","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Akihiro Furuzawa, Asami Hayato, Aya Bamba, Hideyo Kunieda, Hiroya Yamaguchi, John Patrick Hughes, Kazuo Makishima, Kenzo Kinugasa, Midori Ozawa, Satoru Katsuda, Toru Tamagawa, Una Hwang, Yukikatsu Terada","submitted_at":"2010-09-30T02:28:18Z","abstract_excerpt":"We show that the expansion of ejecta in Tycho's supernova remnant (SNR) is consistent with a spherically symmetric shell, based on Suzaku measurements of the Doppler broadened X-ray emission lines. All the strong K_alpha line emission show broader widths at the center than at the rim, while the centroid energies are constant across the remnant (except for Ca). This is the pattern expected for Doppler broadening due to expansion of the SNR ejecta in a spherical shell. To determine the expansion velocities of the ejecta, we applied a model for each emission line feature having two Gaussian compo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.6031","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":"2026-05-18T02:05:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cobx7xYC1bx+38vdb4izALo8St7LvM52NRNGC3A8K9tg79mgjOI0hUUHYa5CwtIx7D6tDEr/GE8fh0ntyNNBDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:17:50.789740Z"},"content_sha256":"fa3088bf12e328c23f7bc878191516e5c4861193f8bbddf0c45c4e4f38354b77","schema_version":"1.0","event_id":"sha256:fa3088bf12e328c23f7bc878191516e5c4861193f8bbddf0c45c4e4f38354b77"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2LQXNHB764RKZ56WDISEDAGC4H/bundle.json","state_url":"https://pith.science/pith/2LQXNHB764RKZ56WDISEDAGC4H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2LQXNHB764RKZ56WDISEDAGC4H/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":"2026-05-26T23:17:50Z","links":{"resolver":"https://pith.science/pith/2LQXNHB764RKZ56WDISEDAGC4H","bundle":"https://pith.science/pith/2LQXNHB764RKZ56WDISEDAGC4H/bundle.json","state":"https://pith.science/pith/2LQXNHB764RKZ56WDISEDAGC4H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2LQXNHB764RKZ56WDISEDAGC4H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:2LQXNHB764RKZ56WDISEDAGC4H","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":"4d54b8ec8669568cb5c0ab3a6ddc0245f9c1827a6aaef8a53c20dc8b4e5e3f8c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-09-30T02:28:18Z","title_canon_sha256":"9c2e1c1e23d54e74877f4935cabf5406021ef6913465b4bddd0c711b2a1fe596"},"schema_version":"1.0","source":{"id":"1009.6031","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.6031","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"arxiv_version","alias_value":"1009.6031v1","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.6031","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"pith_short_12","alias_value":"2LQXNHB764RK","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"2LQXNHB764RKZ56W","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"2LQXNHB7","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:fa3088bf12e328c23f7bc878191516e5c4861193f8bbddf0c45c4e4f38354b77","target":"graph","created_at":"2026-05-18T02:05:13Z","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 show that the expansion of ejecta in Tycho's supernova remnant (SNR) is consistent with a spherically symmetric shell, based on Suzaku measurements of the Doppler broadened X-ray emission lines. All the strong K_alpha line emission show broader widths at the center than at the rim, while the centroid energies are constant across the remnant (except for Ca). This is the pattern expected for Doppler broadening due to expansion of the SNR ejecta in a spherical shell. To determine the expansion velocities of the ejecta, we applied a model for each emission line feature having two Gaussian compo","authors_text":"Akihiro Furuzawa, Asami Hayato, Aya Bamba, Hideyo Kunieda, Hiroya Yamaguchi, John Patrick Hughes, Kazuo Makishima, Kenzo Kinugasa, Midori Ozawa, Satoru Katsuda, Toru Tamagawa, Una Hwang, Yukikatsu Terada","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-09-30T02:28:18Z","title":"Expansion Velocity of Ejecta in Tycho's Supernova Remnant Measured by Doppler Broadened X-ray Line Emission"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.6031","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":"sha256:417df486ef43c5535522d734d90d6d3756efabd7dc74bbd5d0fbd7224840593e","target":"record","created_at":"2026-05-18T02:05:13Z","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":"4d54b8ec8669568cb5c0ab3a6ddc0245f9c1827a6aaef8a53c20dc8b4e5e3f8c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-09-30T02:28:18Z","title_canon_sha256":"9c2e1c1e23d54e74877f4935cabf5406021ef6913465b4bddd0c711b2a1fe596"},"schema_version":"1.0","source":{"id":"1009.6031","kind":"arxiv","version":1}},"canonical_sha256":"d2e1769c3ff722acf7d61a244180c2e1d931b71aaccc11e3bb8c7ee455ad441d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2e1769c3ff722acf7d61a244180c2e1d931b71aaccc11e3bb8c7ee455ad441d","first_computed_at":"2026-05-18T02:05:13.269190Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:05:13.269190Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sid0TxIVvzR2pMLqKtrMAwRI9fVtMOaDC6e3q4jqZteNgx7o65vUqDYvvUU/KlUHd2L5zbFBim/m/AnYVhJIBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:05:13.269826Z","signed_message":"canonical_sha256_bytes"},"source_id":"1009.6031","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:417df486ef43c5535522d734d90d6d3756efabd7dc74bbd5d0fbd7224840593e","sha256:fa3088bf12e328c23f7bc878191516e5c4861193f8bbddf0c45c4e4f38354b77"],"state_sha256":"76c4665fda147dc179f822fb4da6842fd793a6a3ae7ef2d4bd5812b438fe91d1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PZLtaRbuaM7zTgi+Qg17sncq4iPlZjYZde6b0Ixpi751h9FIxxgzt9R/CsZaoRuXXB/ZBJfUbQLCClIXDYi1AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T23:17:50.793182Z","bundle_sha256":"7d9cbc2fd57926fe209c5d05e3967fee5204f1657d0c1016587d489b2fd17070"}}