Pith Number

pith:6TFKIPMY

pith:2010:6TFKIPMYQ7JNI67MYHN7SEZR45

not attested not anchored not stored refs pending

Binaries discovered by the SPY project V. GD 687 - a massive double degenerate binary progenitor that will merge within a Hubble time

R. Napiwotzki, S. Geier, T. Kupfer, U. Heber

arxiv:1003.4113 v1 · 2010-03-22 · 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{6TFKIPMYQ7JNI67MYHN7SEZR45}

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	2026-05-18T02:08:24.728292Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f4caa43d9887d2d47becc1dbf91331e751fa0426bfb37f6aa5836ea4ba9e1ea8

Aliases

arxiv: 1003.4113 · arxiv_version: 1003.4113v1 · doi: 10.48550/arxiv.1003.4113 · pith_short_12: 6TFKIPMYQ7JN · pith_short_16: 6TFKIPMYQ7JNI67M · pith_short_8: 6TFKIPMY

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/6TFKIPMYQ7JNI67MYHN7SEZR45 \
  | 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: f4caa43d9887d2d47becc1dbf91331e751fa0426bfb37f6aa5836ea4ba9e1ea8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7a923f6fdbaedd4478b0f43476b45624215e42f386a1ccd43965030721a663c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-03-22T10:22:47Z",
    "title_canon_sha256": "a16b95558e0ac671dde8bb578c283c47b532d97d1ce31c9793febb4ea42d8401"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1003.4113",
    "kind": "arxiv",
    "version": 1
  }
}