Pith Number

pith:MQ2ZL62Y

pith:2007:MQ2ZL62Y5LRREA73JLSQKBBNSG

not attested not anchored not stored refs pending

The HI content of Early-Type Galaxies from the ALFALFA survey I. Catalogued HI sources in the Virgo cluster

B. R. Kent, C. Giovanardi, G. Gavazzi, G. Trinchieri, M. Grossi, M. P. Haynes, M. Scodeggio, R. A. Koopmann, R. Giovanelli, S. di Serego Alighieri, S. Pellegrini

arxiv:0709.2096 v1 · 2007-09-13 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MQ2ZL62Y5LRREA73JLSQKBBNSG}

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	2026-07-04T17:05:41.203978Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

643595fb58eae31203fb4ae505042d918b60a031f71ab58c8e24c8de4b67f420

Aliases

arxiv: 0709.2096 · arxiv_version: 0709.2096v1 · doi: 10.48550/arxiv.0709.2096 · pith_short_12: MQ2ZL62Y5LRR · pith_short_16: MQ2ZL62Y5LRREA73 · pith_short_8: MQ2ZL62Y

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/MQ2ZL62Y5LRREA73JLSQKBBNSG \
  | 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: 643595fb58eae31203fb4ae505042d918b60a031f71ab58c8e24c8de4b67f420

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b21094c0d5d9443ab810c750e52d147d580a9df05dce776e2e39fb1feacfccc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-09-13T15:06:49Z",
    "title_canon_sha256": "a9bc41aa328ff3aa4badbfdd82d7e59f3a804085159b030fcf9fc7a5fb3dca9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0709.2096",
    "kind": "arxiv",
    "version": 1
  }
}