Pith Number

pith:KL4SBMA6

pith:2004:KL4SBMA6TC2Y4YOWBYLIMWDIFN

not attested not anchored not stored refs pending

IRAC Observations of M81

B.T. Draine, D.A. Dale, D. Calzetti, D. Frayer, G.G. Fazio, G. Helou, H.A. Smith, Jr., L. Storrie-Lombardi, M.D. Thornley, M.L.N. Ashby, M. Pahre, M.W. Regan, P. Barmby, P.N. Appleton, R.C. Kennicutt, S. Malhotra, S.P. Willner, S. Stolovy

arxiv:astro-ph/0405626 v2 · 2004-05-31 · 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{KL4SBMA6TC2Y4YOWBYLIMWDIFN}

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	2026-05-18T03:47:43.700305Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

52f920b01e98b58e61d60e168658682b6e1492d16faaa6ef5378c099ef992771

Aliases

arxiv: astro-ph/0405626 · arxiv_version: astro-ph/0405626v2 · doi: 10.48550/arxiv.astro-ph/0405626 · pith_short_12: KL4SBMA6TC2Y · pith_short_16: KL4SBMA6TC2Y4YOW · pith_short_8: KL4SBMA6

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/KL4SBMA6TC2Y4YOWBYLIMWDIFN \
  | 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: 52f920b01e98b58e61d60e168658682b6e1492d16faaa6ef5378c099ef992771

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b22c75295938ca11c307ec83365eae15bf2a41674c5a757a0f8c8bbb43942377",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-05-31T14:40:59Z",
    "title_canon_sha256": "f9dd88be44cb3bbfe6934f04c12c7c3f46440bb3b3e34c65a9ae32eb9dfbdebb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0405626",
    "kind": "arxiv",
    "version": 2
  }
}