Pith Number

pith:W6I56JSE

pith:2006:W6I56JSEPEFZGGNGVGOSMRTZ23

not attested not anchored not stored refs pending

XMM-Newton survey of the central region of M31. Spectral properties and variability of bright X-ray sources and source classification

France Cordova (UCR), IKI), Sergey Trudolyubov (IGPP/UCR, William Priedhorsky (LANL)

arxiv:astro-ph/0610809 v1 · 2006-10-26 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W6I56JSEPEFZGGNGVGOSMRTZ23}

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	2026-07-04T14:56:56.337498Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b791df2644790b9319a6a99d264679d6c854ba5345bd3c16b80578308bce4ac8

Aliases

arxiv: astro-ph/0610809 · arxiv_version: astro-ph/0610809v1 · doi: 10.48550/arxiv.astro-ph/0610809 · pith_short_12: W6I56JSEPEFZ · pith_short_16: W6I56JSEPEFZGGNG · pith_short_8: W6I56JSE

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/W6I56JSEPEFZGGNGVGOSMRTZ23 \
  | 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: b791df2644790b9319a6a99d264679d6c854ba5345bd3c16b80578308bce4ac8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4c66b547092958f425138506ecc98959376a85a681b099aecf0137243b4419a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-10-26T22:39:10Z",
    "title_canon_sha256": "55d123eed031fec013b999fdfbfd7aabed6f01c9a5350c0122de948d490d82a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0610809",
    "kind": "arxiv",
    "version": 1
  }
}