Pith Number

pith:PT2AO2CJ

pith:2009:PT2AO2CJ7P3UBPPROXUXXJ6MTT

not attested not anchored not stored refs pending

Revealing infrared populations of nearby galaxies using the Spitzer Space Telescope

Mikako Matsuura (UCL)

arxiv:0909.4971 v1 · 2009-09-27 · astro-ph.CO · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PT2AO2CJ7P3UBPPROXUXXJ6MTT}

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	2026-05-18T02:11:37.169403Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7cf4076849fbf740bdf175e97ba7cc9cc170c28203cf8d990809e8b89749d3fe

Aliases

arxiv: 0909.4971 · arxiv_version: 0909.4971v1 · doi: 10.48550/arxiv.0909.4971 · pith_short_12: PT2AO2CJ7P3U · pith_short_16: PT2AO2CJ7P3UBPPR · pith_short_8: PT2AO2CJ

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/PT2AO2CJ7P3UBPPROXUXXJ6MTT \
  | 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: 7cf4076849fbf740bdf175e97ba7cc9cc170c28203cf8d990809e8b89749d3fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "56e4780b70ccb4a42bc2e57862f154350e7da8b5a367fe71b335890109600c9b",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-27T22:17:46Z",
    "title_canon_sha256": "a3928b0f0ae693760d8fdb664c33ce66c76f9568eef755de0a9aea97cbfc5c9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.4971",
    "kind": "arxiv",
    "version": 1
  }
}