Pith Number

pith:2YM4EXR2

pith:2018:2YM4EXR2SBO3V2UKVYNMZHDXRX

not attested not anchored not stored refs pending

The Carnegie-Chicago Hubble Program. IV. The Distances to NGC 4424, NGC 4526, and NGC 4536 via the Tip of the Red Giant Branch

Andrew J. Monson, Barry F. Madore, Dylan Hatt, In Sung Jang, Jeffrey A. Rich, Mark Seibert, Myung Gyoon Lee, Rachael L. Beaton, Taylor J. Hoyt, Victoria Scowcroft, Wendy L. Freedman

arxiv:1806.02900 v2 · 2018-06-07 · astro-ph.CO · 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{2YM4EXR2SBO3V2UKVYNMZHDXRX}

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	2026-05-18T00:05:45.398496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d619c25e3a905dbaea8aae1acc9c778dff71b2147bae323e92cdbdaa72ff53ee

Aliases

arxiv: 1806.02900 · arxiv_version: 1806.02900v2 · doi: 10.48550/arxiv.1806.02900 · pith_short_12: 2YM4EXR2SBO3 · pith_short_16: 2YM4EXR2SBO3V2UK · pith_short_8: 2YM4EXR2

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/2YM4EXR2SBO3V2UKVYNMZHDXRX \
  | 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: d619c25e3a905dbaea8aae1acc9c778dff71b2147bae323e92cdbdaa72ff53ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "47835bb765d2f4bcc083e534db0db8f4602c6689ac85960db1bf1aeb3a06ef72",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2018-06-07T20:57:19Z",
    "title_canon_sha256": "7861fa0d1cd3b5b5ff22d2e29c00b2df58455e4c63e13dd088c6e95fcd9d1e79"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.02900",
    "kind": "arxiv",
    "version": 2
  }
}