Pith Number

pith:5LAOBGXF

pith:2009:5LAOBGXF5CIPZGIXLDRWAUAUNT

not attested not anchored not stored refs pending

Spitzer Observations of Passive and Star Forming Early-type Galaxies: an Infrared Color-Color Sequence

(2) Universita' di Bologna, 3), (3) UC Santa Cruz), Fabrizio Brighenti (2, Pasquale Temi (1), William G. Mathews (3) ((1) NASA - Ames Research Center

arxiv:0911.0720 v1 · 2009-11-04 · 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{5LAOBGXF5CIPZGIXLDRWAUAUNT}

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	2026-05-18T02:34:11.952413Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eac0e09ae5e890fc991758e36050146cce8c30e763bd35c2a438f53c1eb2f935

Aliases

arxiv: 0911.0720 · arxiv_version: 0911.0720v1 · doi: 10.48550/arxiv.0911.0720 · pith_short_12: 5LAOBGXF5CIP · pith_short_16: 5LAOBGXF5CIPZGIX · pith_short_8: 5LAOBGXF

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/5LAOBGXF5CIPZGIXLDRWAUAUNT \
  | 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: eac0e09ae5e890fc991758e36050146cce8c30e763bd35c2a438f53c1eb2f935

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "270e45a19ce0a7d3944951fb5bfba06e66777537f5b656a4d6c10d2cbadb101e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-11-04T02:37:25Z",
    "title_canon_sha256": "0e73442b0475c43cd4eb6a47bb4dd46fd44122eff071ab555e753d668d9368e6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.0720",
    "kind": "arxiv",
    "version": 1
  }
}