Pith Number

pith:LF2SISWJ

pith:2019:LF2SISWJSCKUMELPADJMJ5QSGH

not attested not anchored not stored refs pending

Understanding Broad Mg II Variability in Quasars with Photoionization: Implications for Reverberation Mapping and Changing-Look Quasars

Hengxiao Guo (Illinois), Minzhi Kong (HNU), Mouyuan Sun (USTC), Qian Yang (Illinois), Shu Wang (KIAA), Tinggui Wang (USTC), Xin Liu (Illinois), Yue Shen (Illinois), Zhenfeng Sheng (USTC), Zhicheng He (USTC)

arxiv:1907.06669 v2 · 2019-07-15 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LF2SISWJSCKUMELPADJMJ5QSGH}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T00:34:01.856404Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5975244ac9909546116f00d2c4f61231f0421fb27b52e6888a6d4e9a46bd3055

Aliases

arxiv: 1907.06669 · arxiv_version: 1907.06669v2 · doi: 10.48550/arxiv.1907.06669 · pith_short_12: LF2SISWJSCKU · pith_short_16: LF2SISWJSCKUMELP · pith_short_8: LF2SISWJ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/LF2SISWJSCKUMELPADJMJ5QSGH \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 5975244ac9909546116f00d2c4f61231f0421fb27b52e6888a6d4e9a46bd3055

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6bdeac83389315c1a49a0aacf3e3cad4729578d857cb1a3f0f19f127a25899ae",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-07-15T18:05:05Z",
    "title_canon_sha256": "bde678dce87f0613f27f1140ac84ca00e2c30d106ea8be47e5b503e3839c603e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.06669",
    "kind": "arxiv",
    "version": 2
  }
}