Pith Number

pith:F4UPTPMT

pith:2009:F4UPTPMTA5DUUSWVU5V7XSBOO2

not attested not anchored not stored refs pending

Recent discoveries of supersoft X-ray sources in M 31

A. Rau, D. Hatzidimitriou, D. H. Hartmann, F. Haberl, G. Sala, H. Stiele, J. Greiner, M. Henze, M. Hernanz, M. J. Freyberg, M. Orio, W. Pietsch

arxiv:0912.1247 v1 · 2009-12-07 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F4UPTPMTA5DUUSWVU5V7XSBOO2}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:10:25.975842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f28f9bd9307474a4ad5a76bfbc82e7695f196fb63162b2dfe52b2b7b5210e24

Aliases

arxiv: 0912.1247 · arxiv_version: 0912.1247v1 · doi: 10.48550/arxiv.0912.1247 · pith_short_12: F4UPTPMTA5DU · pith_short_16: F4UPTPMTA5DUUSWV · pith_short_8: F4UPTPMT

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/F4UPTPMTA5DUUSWVU5V7XSBOO2 \
  | 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: 2f28f9bd9307474a4ad5a76bfbc82e7695f196fb63162b2dfe52b2b7b5210e24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38cbd85d1b6c143e9f2f7183efe7a6d5047952913354e0e3d2f303a9b48f0830",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-12-07T14:15:20Z",
    "title_canon_sha256": "5da362df1fb1e7a140ccc17a5ba19adc84405bc7721a2cd19daa72840c5043df"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1247",
    "kind": "arxiv",
    "version": 1
  }
}