Pith Number

pith:7BPTPDOY

pith:2012:7BPTPDOY4MAOPHLWR22WRJHTTM

not attested not anchored not stored refs pending

A photospheric metal line profile analysis of hot DA white dwarfs with circumstellar material

Barry Y. Welsh, Martin A. Barstow, Nathan J. Dickinson

arxiv:1209.5949 v1 · 2012-09-26 · 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{7BPTPDOY4MAOPHLWR22WRJHTTM}

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	2026-05-18T01:54:18.564245Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f85f378dd8e300e79d768eb568a4f39b19ad7b41ceb59f34e44966b15f940e80

Aliases

arxiv: 1209.5949 · arxiv_version: 1209.5949v1 · doi: 10.48550/arxiv.1209.5949 · pith_short_12: 7BPTPDOY4MAO · pith_short_16: 7BPTPDOY4MAOPHLW · pith_short_8: 7BPTPDOY

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/7BPTPDOY4MAOPHLWR22WRJHTTM \
  | 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: f85f378dd8e300e79d768eb568a4f39b19ad7b41ceb59f34e44966b15f940e80

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95c6c10780012f01ed292369ec7286ae6f0799ebbeff14aa7a8802e13dce4aca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-09-26T14:20:19Z",
    "title_canon_sha256": "d832a878fe01300b171e7f19cfb092eccef1f44f4f543f5e3ef36968b5d64007"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.5949",
    "kind": "arxiv",
    "version": 1
  }
}