Pith Number

pith:K2PYDKGT

pith:2009:K2PYDKGT2BDBACJJGZZM7PAYTF

not attested not anchored not stored refs pending

Methods for Estimating Fluxes and Absorptions of Faint X-ray Sources

Eric D. Feigelson (1), Gordon P. Garmire (1) ((1) Penn State University), Konstantin V. Getman (1), Leisa K. Townsley (1), Patrick S. Broos (1)

arxiv:0912.0202 v1 · 2009-12-01 · astro-ph.SR · astro-ph.GA · astro-ph.HE · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K2PYDKGT2BDBACJJGZZM7PAYTF}

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	2026-05-18T02:34:02.808837Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

569f81a8d3d0461009293672cfbc189965d2da4b36d26ad5d96d74d12b843fdb

Aliases

arxiv: 0912.0202 · arxiv_version: 0912.0202v1 · doi: 10.48550/arxiv.0912.0202 · pith_short_12: K2PYDKGT2BDB · pith_short_16: K2PYDKGT2BDBACJJ · pith_short_8: K2PYDKGT

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/K2PYDKGT2BDBACJJGZZM7PAYTF \
  | 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: 569f81a8d3d0461009293672cfbc189965d2da4b36d26ad5d96d74d12b843fdb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "afd176ccd72a4ac3f224f1cb9857e9bfb45cb8b8869da24f9f0fa67651e22370",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE",
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-12-01T16:39:31Z",
    "title_canon_sha256": "b6c1a740998328c1211a9c0513813049b704587ae78740b6083a61bdda0d2bbb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0202",
    "kind": "arxiv",
    "version": 1
  }
}