Pith Number

pith:EQ4JTXK6

pith:2009:EQ4JTXK6IEBKINTIDRTCFQNP4K

not attested not anchored not stored refs pending

Lucky Imaging of M subdwarfs

E. L. Martin (1) ((1) IAC, M. R. Zapatero Osorio (1), N. Lodieu (1), Spain), Tenerife

arxiv:0903.4057 v1 · 2009-03-24 · astro-ph.GA · 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{EQ4JTXK6IEBKINTIDRTCFQNP4K}

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	2026-05-18T02:14:26.290172Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

243899dd5e4102a436681c6622c1afe2bc8d5601b863ca66dc94c56554ed4047

Aliases

arxiv: 0903.4057 · arxiv_version: 0903.4057v1 · doi: 10.48550/arxiv.0903.4057 · pith_short_12: EQ4JTXK6IEBK · pith_short_16: EQ4JTXK6IEBKINTI · pith_short_8: EQ4JTXK6

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/EQ4JTXK6IEBKINTIDRTCFQNP4K \
  | 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: 243899dd5e4102a436681c6622c1afe2bc8d5601b863ca66dc94c56554ed4047

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "835ec50c9e2f99d0d68ad18ca63b354f2e1d7c83733ccc1f3383e15962587fd1",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-03-24T10:45:35Z",
    "title_canon_sha256": "815dfb197b5818602b8531aacae745b4babcabc8359731a7bcff1e7649d1c6c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4057",
    "kind": "arxiv",
    "version": 1
  }
}