Pith Number

pith:FWI2H6YC

pith:2022:FWI2H6YCG7XMKGB57C22CPDAZH

not attested not anchored not stored refs pending

Optical Variability of "Light-weight" Supermassive Black Holes at a Few Percent Level from ZTF Forced-Photometry Light Curves

Igor Chilingarian, Ivan Katkov, Ivan Kuzmin, Kirill Grishin, Mariia Demianenko, Victoria Toptun, Vladimir Goradzhanov

arxiv:2201.03712 v1 · 2022-01-11 · astro-ph.GA · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FWI2H6YCG7XMKGB57C22CPDAZH}

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	2026-07-05T03:47:32.536732Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d91a3fb0237eec5183df8b5a13c60c9f6350ca3d0adee3a8dc0c6b701978631

Aliases

arxiv: 2201.03712 · arxiv_version: 2201.03712v1 · doi: 10.48550/arxiv.2201.03712 · pith_short_12: FWI2H6YCG7XM · pith_short_16: FWI2H6YCG7XMKGB5 · pith_short_8: FWI2H6YC

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/FWI2H6YCG7XMKGB57C22CPDAZH \
  | 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: 2d91a3fb0237eec5183df8b5a13c60c9f6350ca3d0adee3a8dc0c6b701978631

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f0cc8e00168ba14abb7cd99652898e81a888810436000a7b4d67d28134c7088c",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2022-01-11T00:24:51Z",
    "title_canon_sha256": "437a326c47ee2f7e76c885543cad7f4667b7db120c54e0429c1607f7e93eb2cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2201.03712",
    "kind": "arxiv",
    "version": 1
  }
}