Pith Number

pith:QWF4GP6N

pith:2010:QWF4GP6NJS7ZO3UCUYBZV3N6AH

not attested not anchored not stored refs pending

Evidence for a correlation between the Si II 4000 width and Type Ia supernova color

A. Goobar, C. Balland, D. P. Schneider, H. Lampeitl, J. C. Wheeler, J. Nordin, J. Sollerman, L. Ostman, M. Sako, M. Smith, R. C. Nichol

arxiv:1012.4430 v2 · 2010-12-20 · 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{QWF4GP6NJS7ZO3UCUYBZV3N6AH}

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	2026-05-18T02:04:21.790349Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

858bc33fcd4cbf976e82a6039aedbe01e78b2e85bbf37a0656c36c98775c0679

Aliases

arxiv: 1012.4430 · arxiv_version: 1012.4430v2 · doi: 10.48550/arxiv.1012.4430 · pith_short_12: QWF4GP6NJS7Z · pith_short_16: QWF4GP6NJS7ZO3UC · pith_short_8: QWF4GP6N

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/QWF4GP6NJS7ZO3UCUYBZV3N6AH \
  | 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: 858bc33fcd4cbf976e82a6039aedbe01e78b2e85bbf37a0656c36c98775c0679

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca2f31526e8d5e831f6df78f23fbb64de8d1f7bdf360be9f2762ce6c284218f2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-12-20T18:32:22Z",
    "title_canon_sha256": "b97db97ffc17e078be7ef1b3a560468000799f7ed23549338318e58e828993c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.4430",
    "kind": "arxiv",
    "version": 2
  }
}