Pith Number

pith:6HGVQBLO

pith:2009:6HGVQBLOFHARIXZNNZ7XOWDECN

not attested not anchored not stored refs pending

Optical spectroscopy and photometry of SAX J1808.4-3658 in outburst

B. Nord, D. J. Hurley, D. L. DePoy, D. M. Russell, F. Lewis, G. Ramsay, M. T. Reynolds, P. Elebert, P. Hakala, P. J. Callanan, S. R. Kane

arxiv:0901.3991 v1 · 2009-01-26 · 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{6HGVQBLOFHARIXZNNZ7XOWDECN}

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	2026-07-04T17:14:17.888999Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f1cd58056e29c1145f2d6e7f775864135eea0f8079d0133eee2bc03679274f7f

Aliases

arxiv: 0901.3991 · arxiv_version: 0901.3991v1 · doi: 10.48550/arxiv.0901.3991 · pith_short_12: 6HGVQBLOFHAR · pith_short_16: 6HGVQBLOFHARIXZN · pith_short_8: 6HGVQBLO

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/6HGVQBLOFHARIXZNNZ7XOWDECN \
  | 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: f1cd58056e29c1145f2d6e7f775864135eea0f8079d0133eee2bc03679274f7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb90ab5b487c33f566aa3d6f5fd73ec8fe0c58e9cdff51888b0389032d72d1ce",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-01-26T12:56:15Z",
    "title_canon_sha256": "4222b3ae3f1b2774be7393fc766af95c44c314e9721c5d1b2fce2b8b45c7cd2b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.3991",
    "kind": "arxiv",
    "version": 1
  }
}