Pith Number

pith:RYVQQJ6G

pith:2009:RYVQQJ6GLQYOSWHJA2SIWMXWNB

not attested not anchored not stored refs pending

Optical and near infra-red colours as a discriminant of the age and metallicity of stellar populations

Bahram Mobasher, Chris Simpson, Christopher A. Collins, Daniel J. B. Smith, David Carter, Ivan K. Baldry, John P. Stott, Maurizio Salaris, Philip A. James, Susan M. Percival

arxiv:0905.0810 v1 · 2009-05-06 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RYVQQJ6GLQYOSWHJA2SIWMXWNB}

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	2026-05-18T02:34:59.344594Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e2b0827c65c30e958e906a48b32f668691798baf422ca426fd8e6b19f367754

Aliases

arxiv: 0905.0810 · arxiv_version: 0905.0810v1 · doi: 10.48550/arxiv.0905.0810 · pith_short_12: RYVQQJ6GLQYO · pith_short_16: RYVQQJ6GLQYOSWHJ · pith_short_8: RYVQQJ6G

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/RYVQQJ6GLQYOSWHJA2SIWMXWNB \
  | 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: 8e2b0827c65c30e958e906a48b32f668691798baf422ca426fd8e6b19f367754

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "403f0bfc43f072fc4d9003dcf4fccb9fde65533d29230e1a19d644e8868bd66c",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-06T16:16:14Z",
    "title_canon_sha256": "921f6d66fafb3084c73ea0d622f610afc4e0f25ad4a0c8d027ac2a624adb839d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.0810",
    "kind": "arxiv",
    "version": 1
  }
}