{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:SOU5LHFBWZQIZXACIRJDU3L7NU","short_pith_number":"pith:SOU5LHFB","canonical_record":{"source":{"id":"1507.02690","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-09T20:00:42Z","cross_cats_sorted":[],"title_canon_sha256":"e3ddf306e324d84b7492e48a446dd334b5ab2743763fccb0649e5f61e9c67e4c","abstract_canon_sha256":"97b5d2955ec535f01ce63ce43f4349b3e28d12321a2a879ab1ff7d4bddde02de"},"schema_version":"1.0"},"canonical_sha256":"93a9d59ca1b6608cdc0244523a6d7f6d1e10e0f75ddc4f3ead00b98597f494ea","source":{"kind":"arxiv","id":"1507.02690","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.02690","created_at":"2026-05-18T01:30:23Z"},{"alias_kind":"arxiv_version","alias_value":"1507.02690v1","created_at":"2026-05-18T01:30:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.02690","created_at":"2026-05-18T01:30:23Z"},{"alias_kind":"pith_short_12","alias_value":"SOU5LHFBWZQI","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SOU5LHFBWZQIZXAC","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SOU5LHFB","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:SOU5LHFBWZQIZXACIRJDU3L7NU","target":"record","payload":{"canonical_record":{"source":{"id":"1507.02690","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-09T20:00:42Z","cross_cats_sorted":[],"title_canon_sha256":"e3ddf306e324d84b7492e48a446dd334b5ab2743763fccb0649e5f61e9c67e4c","abstract_canon_sha256":"97b5d2955ec535f01ce63ce43f4349b3e28d12321a2a879ab1ff7d4bddde02de"},"schema_version":"1.0"},"canonical_sha256":"93a9d59ca1b6608cdc0244523a6d7f6d1e10e0f75ddc4f3ead00b98597f494ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:30:23.718186Z","signature_b64":"QTCdau6pYtv2l9uzpDZYq9CzDJHV+Zhjbk/hOIoi1ZYuDfdWrYHtpilF2q8MG5FTKsKJbHcqQZZmxuZJSL7qAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"93a9d59ca1b6608cdc0244523a6d7f6d1e10e0f75ddc4f3ead00b98597f494ea","last_reissued_at":"2026-05-18T01:30:23.717450Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:30:23.717450Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.02690","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":"2026-05-18T01:30:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bk2ZNT/GHMqVrPM3o8MfFcpb4rihdZ3BihmfnOG+0JtHbLwXUCoX2MGDs5mvE28IRN31vEqzCJ9+xp6yA3nPBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:14:03.861131Z"},"content_sha256":"9a46c78d5183490d10f438ba05fc8b1ec9b8f30de1fe2bd7d1507407934e7dc7","schema_version":"1.0","event_id":"sha256:9a46c78d5183490d10f438ba05fc8b1ec9b8f30de1fe2bd7d1507407934e7dc7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:SOU5LHFBWZQIZXACIRJDU3L7NU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fifteen years of XMM-Newton and Chandra monitoring of Sgr A*: Evidence for a recent increase in the bright flaring rate","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Goldwurm, A. Merloni, B. De Marco, D. Haggard, G. Ponti, J. Neilsen, K. Mori, K. Nandra, M. Clavel, M. R. Morris, N. Degenaar, N. Rea, R. Terrier, S. Gillessen, S. Zhang, T. Munoz-Darias","submitted_at":"2015-07-09T20:00:42Z","abstract_excerpt":"We present a study of the X-ray flaring activity of Sgr A* during all the 150 XMM-Newton and Chandra observations pointed at the Milky Way center over the last 15 years. This includes the latest XMM-Newton and Chandra campaigns devoted to monitoring the closest approach of the very red Br-Gamma emitting object called G2. The entire dataset analysed extends from September 1999 through November 2014. We employed a Bayesian block analysis to investigate any possible variations in the characteristics (frequency, energetics, peak intensity, duration) of the flaring events that Sgr A* has exhibited "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02690","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":"2026-05-18T01:30:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G3ZnlfmZZtdahCae7/zjJSQzfNeUlAQu5AMecnfBRkd+8GdfaN1XgoxO5/QpxGynDwLDIGf/lzNqYOd+AxAAAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:14:03.861808Z"},"content_sha256":"ba1e83fd7ae26edce51e12c3135141f1f7f9e6e4bfe7f03eab766ea653d2f69b","schema_version":"1.0","event_id":"sha256:ba1e83fd7ae26edce51e12c3135141f1f7f9e6e4bfe7f03eab766ea653d2f69b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SOU5LHFBWZQIZXACIRJDU3L7NU/bundle.json","state_url":"https://pith.science/pith/SOU5LHFBWZQIZXACIRJDU3L7NU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SOU5LHFBWZQIZXACIRJDU3L7NU/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":"2026-05-26T05:14:03Z","links":{"resolver":"https://pith.science/pith/SOU5LHFBWZQIZXACIRJDU3L7NU","bundle":"https://pith.science/pith/SOU5LHFBWZQIZXACIRJDU3L7NU/bundle.json","state":"https://pith.science/pith/SOU5LHFBWZQIZXACIRJDU3L7NU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SOU5LHFBWZQIZXACIRJDU3L7NU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:SOU5LHFBWZQIZXACIRJDU3L7NU","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":"97b5d2955ec535f01ce63ce43f4349b3e28d12321a2a879ab1ff7d4bddde02de","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-09T20:00:42Z","title_canon_sha256":"e3ddf306e324d84b7492e48a446dd334b5ab2743763fccb0649e5f61e9c67e4c"},"schema_version":"1.0","source":{"id":"1507.02690","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.02690","created_at":"2026-05-18T01:30:23Z"},{"alias_kind":"arxiv_version","alias_value":"1507.02690v1","created_at":"2026-05-18T01:30:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.02690","created_at":"2026-05-18T01:30:23Z"},{"alias_kind":"pith_short_12","alias_value":"SOU5LHFBWZQI","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SOU5LHFBWZQIZXAC","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SOU5LHFB","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:ba1e83fd7ae26edce51e12c3135141f1f7f9e6e4bfe7f03eab766ea653d2f69b","target":"graph","created_at":"2026-05-18T01:30:23Z","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 a study of the X-ray flaring activity of Sgr A* during all the 150 XMM-Newton and Chandra observations pointed at the Milky Way center over the last 15 years. This includes the latest XMM-Newton and Chandra campaigns devoted to monitoring the closest approach of the very red Br-Gamma emitting object called G2. The entire dataset analysed extends from September 1999 through November 2014. We employed a Bayesian block analysis to investigate any possible variations in the characteristics (frequency, energetics, peak intensity, duration) of the flaring events that Sgr A* has exhibited ","authors_text":"A. Goldwurm, A. Merloni, B. De Marco, D. Haggard, G. Ponti, J. Neilsen, K. Mori, K. Nandra, M. Clavel, M. R. Morris, N. Degenaar, N. Rea, R. Terrier, S. Gillessen, S. Zhang, T. Munoz-Darias","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-09T20:00:42Z","title":"Fifteen years of XMM-Newton and Chandra monitoring of Sgr A*: Evidence for a recent increase in the bright flaring rate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02690","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":"sha256:9a46c78d5183490d10f438ba05fc8b1ec9b8f30de1fe2bd7d1507407934e7dc7","target":"record","created_at":"2026-05-18T01:30:23Z","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":"97b5d2955ec535f01ce63ce43f4349b3e28d12321a2a879ab1ff7d4bddde02de","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-09T20:00:42Z","title_canon_sha256":"e3ddf306e324d84b7492e48a446dd334b5ab2743763fccb0649e5f61e9c67e4c"},"schema_version":"1.0","source":{"id":"1507.02690","kind":"arxiv","version":1}},"canonical_sha256":"93a9d59ca1b6608cdc0244523a6d7f6d1e10e0f75ddc4f3ead00b98597f494ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"93a9d59ca1b6608cdc0244523a6d7f6d1e10e0f75ddc4f3ead00b98597f494ea","first_computed_at":"2026-05-18T01:30:23.717450Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:23.717450Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QTCdau6pYtv2l9uzpDZYq9CzDJHV+Zhjbk/hOIoi1ZYuDfdWrYHtpilF2q8MG5FTKsKJbHcqQZZmxuZJSL7qAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:23.718186Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.02690","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9a46c78d5183490d10f438ba05fc8b1ec9b8f30de1fe2bd7d1507407934e7dc7","sha256:ba1e83fd7ae26edce51e12c3135141f1f7f9e6e4bfe7f03eab766ea653d2f69b"],"state_sha256":"8130fed15cddf868f38b02033e871ee474cb35f2c2d35043284fe11f53945740"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"La9WWRIa7E7o5tUPBzYcq/aIA00P3h/vzEtkC138anFb/+DclHUcUJHHdjqLCLSU+4Xd5WOtXLl3R8WdZwzECg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T05:14:03.865066Z","bundle_sha256":"baa9a2ea3173be3336a8011e89febefefc1f98b7f2dba1d8de4ede3d4850dfb5"}}