Pith Number

pith:6RVS5TQW

pith:2013:6RVS5TQWJM6S2M3H2EPR3UPDZO

not attested not anchored not stored refs pending

Representing the "butterfly" projection in FITS - projection code XPH

Mark R. Calabretta, Stuart R. Lowe

arxiv:1308.6647 v1 · 2013-08-30 · astro-ph.IM · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6RVS5TQWJM6S2M3H2EPR3UPDZO}

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	2026-05-18T01:47:56.615956Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f46b2ece164b3d2d3367d11f1dd1e3cba784527cdaff3fc3ea0e8d68f43c2653

Aliases

arxiv: 1308.6647 · arxiv_version: 1308.6647v1 · doi: 10.48550/arxiv.1308.6647 · pith_short_12: 6RVS5TQWJM6S · pith_short_16: 6RVS5TQWJM6S2M3H · pith_short_8: 6RVS5TQW

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/6RVS5TQWJM6S2M3H2EPR3UPDZO \
  | 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: f46b2ece164b3d2d3367d11f1dd1e3cba784527cdaff3fc3ea0e8d68f43c2653

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c50a758c122270dfce635a75edb49e524ca7253cd295a78715967762f4c7afff",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-08-30T04:25:13Z",
    "title_canon_sha256": "625ff3c77008437273b0beccbfc488237644a32c1e6b1effe29bb5e2bd79743e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.6647",
    "kind": "arxiv",
    "version": 1
  }
}