Pith Number

pith:QWMGRJ4W

pith:2009:QWMGRJ4WH6PBWGJYFQHI4TVU5X

not attested not anchored not stored refs pending

Suzaku Detection of Super-hard X-ray Emission from the Classical Nova V2491 Cygni

D. Takei, H. Takahashi, J. J. Drake, J.-U. Ness, K. Mukai, M. Tsujimoto, S. Kitamoto

arxiv:0904.1693 v1 · 2009-04-10 · 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{QWMGRJ4WH6PBWGJYFQHI4TVU5X}

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	2026-07-04T17:19:29.605865Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

859868a7963f9e1b19382c0e8e4eb4eddc52f73c84511db8d51e6c190d464202

Aliases

arxiv: 0904.1693 · arxiv_version: 0904.1693v1 · doi: 10.48550/arxiv.0904.1693 · pith_short_12: QWMGRJ4WH6PB · pith_short_16: QWMGRJ4WH6PBWGJY · pith_short_8: QWMGRJ4W

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/QWMGRJ4WH6PBWGJYFQHI4TVU5X \
  | 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: 859868a7963f9e1b19382c0e8e4eb4eddc52f73c84511db8d51e6c190d464202

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90c2d78dfdbb0ed2bf084d0f01c95e7477cecd12a8e6b3547195381507bad3ed",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-04-10T17:21:41Z",
    "title_canon_sha256": "1bed0fe8d0c1a281fce073912c85f6d00c005f8947690b3487041672b6447715"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1693",
    "kind": "arxiv",
    "version": 1
  }
}