Pith Number

pith:BLJACOZA

pith:2013:BLJACOZAMHNTDC44ZHXOMCCLWX

not attested not anchored not stored refs pending

Spectropolarimetric observations of cool DQ white dwarfs

Andrei Berdyugin, Svetlana Berdyugina, Tommi Vornanen

arxiv:1308.4505 v1 · 2013-08-21 · 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{BLJACOZAMHNTDC44ZHXOMCCLWX}

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	2026-05-18T03:15:05.334621Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ad2013b2061db318b9cc9eee6084bb5c9d50f1481122e33be8c419e96310d30

Aliases

arxiv: 1308.4505 · arxiv_version: 1308.4505v1 · doi: 10.48550/arxiv.1308.4505 · pith_short_12: BLJACOZAMHNT · pith_short_16: BLJACOZAMHNTDC44 · pith_short_8: BLJACOZA

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/BLJACOZAMHNTDC44ZHXOMCCLWX \
  | 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: 0ad2013b2061db318b9cc9eee6084bb5c9d50f1481122e33be8c419e96310d30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54597a0b20ea81fa24f5270575bbc03489ae26eb693c8df98e707f84cf033610",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-08-21T08:17:43Z",
    "title_canon_sha256": "85dada6e67aa9c3956d72089475d55ea7de75bbbdc7555ed9d8921f8be2f7db3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.4505",
    "kind": "arxiv",
    "version": 1
  }
}