Pith Number

pith:GFFEZBZC

pith:2008:GFFEZBZCZSKPTO33MUZ7CLY2OA

not attested not anchored not stored refs pending

A Second Case of Variable Na I D Lines in a Highly-Reddened Type Ia Supernova (with Erratum)

F. Patat, J. L. Prieto, M. Hicken, M. Modjaz, P. Challis, R. P. Kirshner, S. Blondin, T. Matheson

arxiv:0811.0002 v3 · 2008-10-31 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GFFEZBZCZSKPTO33MUZ7CLY2OA}

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	2026-05-18T00:40:42.333900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

314a4c8722cc94f9bb7b6533f12f1a700c2e38450688174d759d2b5af0d2f655

Aliases

arxiv: 0811.0002 · arxiv_version: 0811.0002v3 · doi: 10.48550/arxiv.0811.0002 · pith_short_12: GFFEZBZCZSKP · pith_short_16: GFFEZBZCZSKPTO33 · pith_short_8: GFFEZBZC

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/GFFEZBZCZSKPTO33MUZ7CLY2OA \
  | 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: 314a4c8722cc94f9bb7b6533f12f1a700c2e38450688174d759d2b5af0d2f655

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7249c3b9650430c1de691a813ae84d807c129538c45be4b4ff8ce456e143995d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-10-31T20:00:35Z",
    "title_canon_sha256": "2a0ae9063df3fd17e838ad6926d0f9d49e25381e56c0e35ce3ae1583f11611a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0811.0002",
    "kind": "arxiv",
    "version": 3
  }
}