Pith Number

pith:DJEM2Z22

pith:2001:DJEM2Z22VHJOLGAQLJNMVN63QA

not attested not anchored not stored refs pending

Optical identification of sources from the HELLAS2XMM survey

A. Baldi, A. Comastri, C. Vignali (The Hellas2XMM collaboration), F. Fiore, F. La Franca, G.C. Perola, G. Matt, M. Brusa, M. Mignoli, P. Ciliegi, P. Severgnini, R. Maiolino, S. Molendi

arxiv:astro-ph/0109116 v1 · 2001-09-07 · 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{DJEM2Z22VHJOLGAQLJNMVN63QA}

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	2026-07-04T14:11:27.653848Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a48cd675aa9d2e598105a5acab7db802a8b674a3f266a13d60271cac0b4a4c9

Aliases

arxiv: astro-ph/0109116 · arxiv_version: astro-ph/0109116v1 · doi: 10.48550/arxiv.astro-ph/0109116 · pith_short_12: DJEM2Z22VHJO · pith_short_16: DJEM2Z22VHJOLGAQ · pith_short_8: DJEM2Z22

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/DJEM2Z22VHJOLGAQLJNMVN63QA \
  | 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: 1a48cd675aa9d2e598105a5acab7db802a8b674a3f266a13d60271cac0b4a4c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "56f7f27990873ca83be1197a8847e17faac75fb69a0cdb6eb6a9562d1413de0e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-09-07T13:21:26Z",
    "title_canon_sha256": "4a5d2086dd7112966e50bedfa4b1333e0cc82be84de053e09a85aaa04bbfa921"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0109116",
    "kind": "arxiv",
    "version": 1
  }
}