Pith Number

pith:ZQRKJXEI

pith:2009:ZQRKJXEIKUFZWCXGMSOFFJAGZQ

not attested not anchored not stored refs pending

Chandra Discovery of an Intermediate Polar in Baade's Window

JaeSub Hong (CfA), Jonathan E. Grindlay (CfA), Maureen van den Berg (CfA), Ping Zhao (CfA), Silas Laycock (Gemini)

arxiv:0905.0041 v2 · 2009-05-01 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZQRKJXEIKUFZWCXGMSOFFJAGZQ}

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	2026-05-18T04:29:43.213426Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc22a4dc88550b9b0ae6649c52a406cc0dc1c702b8461a3655409e0998301b0d

Aliases

arxiv: 0905.0041 · arxiv_version: 0905.0041v2 · doi: 10.48550/arxiv.0905.0041 · pith_short_12: ZQRKJXEIKUFZ · pith_short_16: ZQRKJXEIKUFZWCXG · pith_short_8: ZQRKJXEI

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/ZQRKJXEIKUFZWCXGMSOFFJAGZQ \
  | 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: cc22a4dc88550b9b0ae6649c52a406cc0dc1c702b8461a3655409e0998301b0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "399c8e5160e66217199dfff35f544c6e884562775f877906c3de0007be0d0cb4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-05-01T03:06:49Z",
    "title_canon_sha256": "ddf2a4e726288ad7d8efc56a890cec8008e46827541725efc3c994c8a5ea17e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.0041",
    "kind": "arxiv",
    "version": 2
  }
}