{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:LBLAONFG4JMMF4LEM7UECBAFQP","short_pith_number":"pith:LBLAONFG","canonical_record":{"source":{"id":"2009.01104","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-02T14:28:38Z","cross_cats_sorted":[],"title_canon_sha256":"f24d097c550c44085c9fbf034f2d3c46eeede638f006f80ef7e9b7dd79d11651","abstract_canon_sha256":"bf1b10fb7d998d2662f7d233c04a40947ddd01e1b6348c40ddccfb81eedd1d1f"},"schema_version":"1.0"},"canonical_sha256":"58560734a6e258c2f16467e841040583cdfa74d81fe46b6f9bf458c5b0dacf52","source":{"kind":"arxiv","id":"2009.01104","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.01104","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"arxiv_version","alias_value":"2009.01104v1","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.01104","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_12","alias_value":"LBLAONFG4JMM","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_16","alias_value":"LBLAONFG4JMMF4LE","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_8","alias_value":"LBLAONFG","created_at":"2026-07-05T01:44:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:LBLAONFG4JMMF4LEM7UECBAFQP","target":"record","payload":{"canonical_record":{"source":{"id":"2009.01104","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-02T14:28:38Z","cross_cats_sorted":[],"title_canon_sha256":"f24d097c550c44085c9fbf034f2d3c46eeede638f006f80ef7e9b7dd79d11651","abstract_canon_sha256":"bf1b10fb7d998d2662f7d233c04a40947ddd01e1b6348c40ddccfb81eedd1d1f"},"schema_version":"1.0"},"canonical_sha256":"58560734a6e258c2f16467e841040583cdfa74d81fe46b6f9bf458c5b0dacf52","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:44:19.065641Z","signature_b64":"WvyN5kaCjKdBnJluP/r6Gmb9KXXFBfNklI6sxL2JkZL0ihPCWQbo5BE6J3AB4hrQZRhFOVCr/GwB8OMnoMWyCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"58560734a6e258c2f16467e841040583cdfa74d81fe46b6f9bf458c5b0dacf52","last_reissued_at":"2026-07-05T01:44:19.065294Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:44:19.065294Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.01104","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":"2026-07-05T01:44:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KRHOQIi23bXtJD+fAaEwGISAUzSKbiQUowKqJu+hqpJbkBKvgufITwDpkAgoNeswqBh++X1sEJboU4ypJOiWDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T09:07:38.832885Z"},"content_sha256":"dc4b8b6a9d63924f2940f3f056f9b4f16d05ecfb16bc1d62343e6472e21e3946","schema_version":"1.0","event_id":"sha256:dc4b8b6a9d63924f2940f3f056f9b4f16d05ecfb16bc1d62343e6472e21e3946"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:LBLAONFG4JMMF4LEM7UECBAFQP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A search for H$_2$O masers in 100 active dwarf galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"I. Zaw, M. J. Rosenthal","submitted_at":"2020-09-02T14:28:38Z","abstract_excerpt":"We present the results of the first dedicated survey for 22 GHz H$_2$O maser emission in dwarf galaxies outside of the local group, with the aim of discovering disc masers. Studies of disc masers yield accurate and precise measurements of black hole mass, and such measurements in dwarf galaxies would be key to understanding the low-mass end of BH-galaxy co-evolution. We used the Green Bank Telescope to survey 100 nearby ($z \\lesssim 0.055$) dwarf galaxies ($M_* \\lesssim 10^{9.5}~M_{\\odot}$) with optical emission line ratios indicative of accretion onto a massive black hole. We detected no new "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.01104","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2009.01104/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:44:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kqHyOKTzXiwO53XeXHn1xDDEFi4A/zq+/Ct8qErwGi+EKO+ytzZUz7D8zwezGmpJB0EG58Ty9fyVjtyCflgTDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T09:07:38.833262Z"},"content_sha256":"989c55710226b50b26c4c7e7fb853f65c5cac7568aba2fdf89126a47f59dee17","schema_version":"1.0","event_id":"sha256:989c55710226b50b26c4c7e7fb853f65c5cac7568aba2fdf89126a47f59dee17"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LBLAONFG4JMMF4LEM7UECBAFQP/bundle.json","state_url":"https://pith.science/pith/LBLAONFG4JMMF4LEM7UECBAFQP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LBLAONFG4JMMF4LEM7UECBAFQP/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":"2026-08-23T09:07:38Z","links":{"resolver":"https://pith.science/pith/LBLAONFG4JMMF4LEM7UECBAFQP","bundle":"https://pith.science/pith/LBLAONFG4JMMF4LEM7UECBAFQP/bundle.json","state":"https://pith.science/pith/LBLAONFG4JMMF4LEM7UECBAFQP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LBLAONFG4JMMF4LEM7UECBAFQP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:LBLAONFG4JMMF4LEM7UECBAFQP","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":"bf1b10fb7d998d2662f7d233c04a40947ddd01e1b6348c40ddccfb81eedd1d1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-02T14:28:38Z","title_canon_sha256":"f24d097c550c44085c9fbf034f2d3c46eeede638f006f80ef7e9b7dd79d11651"},"schema_version":"1.0","source":{"id":"2009.01104","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.01104","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"arxiv_version","alias_value":"2009.01104v1","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.01104","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_12","alias_value":"LBLAONFG4JMM","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_16","alias_value":"LBLAONFG4JMMF4LE","created_at":"2026-07-05T01:44:19Z"},{"alias_kind":"pith_short_8","alias_value":"LBLAONFG","created_at":"2026-07-05T01:44:19Z"}],"graph_snapshots":[{"event_id":"sha256:989c55710226b50b26c4c7e7fb853f65c5cac7568aba2fdf89126a47f59dee17","target":"graph","created_at":"2026-07-05T01:44:19Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2009.01104/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the results of the first dedicated survey for 22 GHz H$_2$O maser emission in dwarf galaxies outside of the local group, with the aim of discovering disc masers. Studies of disc masers yield accurate and precise measurements of black hole mass, and such measurements in dwarf galaxies would be key to understanding the low-mass end of BH-galaxy co-evolution. We used the Green Bank Telescope to survey 100 nearby ($z \\lesssim 0.055$) dwarf galaxies ($M_* \\lesssim 10^{9.5}~M_{\\odot}$) with optical emission line ratios indicative of accretion onto a massive black hole. We detected no new ","authors_text":"I. Zaw, M. J. Rosenthal","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-02T14:28:38Z","title":"A search for H$_2$O masers in 100 active dwarf galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.01104","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:dc4b8b6a9d63924f2940f3f056f9b4f16d05ecfb16bc1d62343e6472e21e3946","target":"record","created_at":"2026-07-05T01:44:19Z","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":"bf1b10fb7d998d2662f7d233c04a40947ddd01e1b6348c40ddccfb81eedd1d1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-02T14:28:38Z","title_canon_sha256":"f24d097c550c44085c9fbf034f2d3c46eeede638f006f80ef7e9b7dd79d11651"},"schema_version":"1.0","source":{"id":"2009.01104","kind":"arxiv","version":1}},"canonical_sha256":"58560734a6e258c2f16467e841040583cdfa74d81fe46b6f9bf458c5b0dacf52","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"58560734a6e258c2f16467e841040583cdfa74d81fe46b6f9bf458c5b0dacf52","first_computed_at":"2026-07-05T01:44:19.065294Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:44:19.065294Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WvyN5kaCjKdBnJluP/r6Gmb9KXXFBfNklI6sxL2JkZL0ihPCWQbo5BE6J3AB4hrQZRhFOVCr/GwB8OMnoMWyCA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:44:19.065641Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.01104","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc4b8b6a9d63924f2940f3f056f9b4f16d05ecfb16bc1d62343e6472e21e3946","sha256:989c55710226b50b26c4c7e7fb853f65c5cac7568aba2fdf89126a47f59dee17"],"state_sha256":"365bb56c4d024b9e16884f4b83df6bc99efb639e81cb304ddd6c809700a11d6f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vf4+qyjU2L66ZVNdO4rWlb+XhPah9Qf6XF9U/9xPZZbQzorocyh4BMGodOSLxcSdQF9qd+s8rGW4N3CxOI/oCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T09:07:38.836855Z","bundle_sha256":"6946e7db70bf87aed67ef943c6d05af5318e5f75c625687cb18c781e52bf6de5"}}