Pith Number

pith:TD7DHEAW

pith:2020:TD7DHEAW6KRZDL4JKWBSAOYKVZ

not attested not anchored not stored refs pending

Reverberation Mapping of Changing-look Active Galactic Nucleus NGC 3516

Chen. Hu, Hai-Cheng. Feng, H. T. Liu, J. M. Bai, Kai-Xing. Lu, Li-Feng. Xing, Ming. Xiao, Sha-Sha. Li, Wei-Yang. Wang, Zi-Xu. Yang

arxiv:2012.15572 v1 · 2020-12-31 · 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{TD7DHEAW6KRZDL4JKWBSAOYKVZ}

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	2026-07-05T02:21:42.329214Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

98fe339016f2a391af895583203b0aae5ccd503dcb757def20c31f7ebd7b4f57

Aliases

arxiv: 2012.15572 · arxiv_version: 2012.15572v1 · doi: 10.48550/arxiv.2012.15572 · pith_short_12: TD7DHEAW6KRZ · pith_short_16: TD7DHEAW6KRZDL4J · pith_short_8: TD7DHEAW

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/TD7DHEAW6KRZDL4JKWBSAOYKVZ \
  | 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: 98fe339016f2a391af895583203b0aae5ccd503dcb757def20c31f7ebd7b4f57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b150f010586fa70f6b24470010d0e61e1ef047e680f9e135351d50560416b64",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-12-31T12:16:55Z",
    "title_canon_sha256": "90a871a2f4c73aff637060d6e745e38864a8e9f54f4074a80c77b6a94114ef1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.15572",
    "kind": "arxiv",
    "version": 1
  }
}