Pith Number

pith:BGFORGMN

pith:2021:BGFORGMN2S4CO4EZMRMCACINBD

not attested not anchored not stored refs pending

Optical light curves of light-weight supermassive black holes produced by the Zwicky Transient Facility Forced Photometry Service

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

arxiv:2112.11520 v1 · 2021-12-21 · 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{BGFORGMN2S4CO4EZMRMCACINBD}

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	2026-07-05T05:01:17.614347Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

098ae8998dd4b8277099645820090d08e50f1b9bc9ca2288fc4f3550e32ab25d

Aliases

arxiv: 2112.11520 · arxiv_version: 2112.11520v1 · doi: 10.48550/arxiv.2112.11520 · pith_short_12: BGFORGMN2S4C · pith_short_16: BGFORGMN2S4CO4EZ · pith_short_8: BGFORGMN

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/BGFORGMN2S4CO4EZMRMCACINBD \
  | 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: 098ae8998dd4b8277099645820090d08e50f1b9bc9ca2288fc4f3550e32ab25d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73d8ddf69a3b5dd1e9bc1c7e2e57d94f88c4ae9b584be3849cdb01a0dbdfc69b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-12-21T21:09:55Z",
    "title_canon_sha256": "ff0a2812ceb78670b433bf087ffd044eec3a30645807b223965122a5917477cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.11520",
    "kind": "arxiv",
    "version": 1
  }
}