Pith Number

pith:OUMCBZ6E

pith:2016:OUMCBZ6EHQ3FLPMF2DHSIJPGUL

not attested not anchored not stored refs pending

Time-Variable Aluminum Absorption in the Polar AR Ursae Majoris, and an Updated Estimate for the Mass of the White Dwarf

Hang Gong, Jifeng Liu, Jincheng Guo, Qing Gao, Stephen Justham, Yu Bai

arxiv:1608.04464 v1 · 2016-08-16 · astro-ph.HE · 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{OUMCBZ6EHQ3FLPMF2DHSIJPGUL}

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	2026-05-18T01:05:41.885901Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

751820e7c43c3655bd85d0cf2425e6a2e16e1c7bbe45285a149401e7e16dfed3

Aliases

arxiv: 1608.04464 · arxiv_version: 1608.04464v1 · doi: 10.48550/arxiv.1608.04464 · pith_short_12: OUMCBZ6EHQ3F · pith_short_16: OUMCBZ6EHQ3FLPMF · pith_short_8: OUMCBZ6E

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/OUMCBZ6EHQ3FLPMF2DHSIJPGUL \
  | 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: 751820e7c43c3655bd85d0cf2425e6a2e16e1c7bbe45285a149401e7e16dfed3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c296db2f83e6bac7f9ee2979d3454369fe2b6193682f1f3bce52dcb3518059d1",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2016-08-16T02:29:03Z",
    "title_canon_sha256": "04a7d604d27e91244c88e7804b1ecad8955f18edac47b14dafeda4c60e438598"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.04464",
    "kind": "arxiv",
    "version": 1
  }
}