Pith Number

pith:F4TBD6WN

pith:2004:F4TBD6WN5VGFBJ4QV27IRVCECQ

not attested not anchored not stored refs pending

Chandra Observation of the Starburst Galaxy NGC 2146

Alison B. Peck, Andrea Tarchi, Hironori Matsumoto, Katsuji Koyama, Satoki Matsushita, Takeshi Go Tsuru, Tatsuya Inui

arxiv:astro-ph/0412249 v1 · 2004-12-10 · 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{F4TBD6WN5VGFBJ4QV27IRVCECQ}

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	2026-07-04T15:20:14.991686Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f2611facded4c50a790aebe88d444141ee391e1db5b3d1802e66a7e5a25af61

Aliases

arxiv: astro-ph/0412249 · arxiv_version: astro-ph/0412249v1 · doi: 10.48550/arxiv.astro-ph/0412249 · pith_short_12: F4TBD6WN5VGF · pith_short_16: F4TBD6WN5VGFBJ4Q · pith_short_8: F4TBD6WN

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/F4TBD6WN5VGFBJ4QV27IRVCECQ \
  | 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: 2f2611facded4c50a790aebe88d444141ee391e1db5b3d1802e66a7e5a25af61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "85c29b313c1c80d1e9f4a18828555b925607e7acf9ea76e8f63451262e19ec6e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-12-10T09:35:53Z",
    "title_canon_sha256": "dd2c3b9a86499759f5be6b0242b37987ee15e493077c0206a4626983d0ec44da"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0412249",
    "kind": "arxiv",
    "version": 1
  }
}