Pith Number

pith:MCHDQ7XL

pith:2010:MCHDQ7XLRUGY5IQFFTRC3H5HW3

not attested not anchored not stored refs pending

The warm absorber and X-ray variability of the Seyfert 1 galaxy NGC 3516 as seen by the XMM-Newton RGS

G. Branduardi-Raymont, M. J. Page (Mullard Space Science Laboratory, M. Mehdipour, University College London)

arxiv:1002.3420 v1 · 2010-02-18 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MCHDQ7XLRUGY5IQFFTRC3H5HW3}

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	2026-05-18T02:08:59.867485Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

608e387eeb8d0d8ea2052ce22d9fa7b6c36eedd7fefc8e245ba5bf7c8d32be19

Aliases

arxiv: 1002.3420 · arxiv_version: 1002.3420v1 · doi: 10.48550/arxiv.1002.3420 · pith_short_12: MCHDQ7XLRUGY · pith_short_16: MCHDQ7XLRUGY5IQF · pith_short_8: MCHDQ7XL

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/MCHDQ7XLRUGY5IQFFTRC3H5HW3 \
  | 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: 608e387eeb8d0d8ea2052ce22d9fa7b6c36eedd7fefc8e245ba5bf7c8d32be19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1a62a40dd8880ac5f037476d36d4774b7fc36c550289d293cb6ceb0388f295c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-02-18T12:18:20Z",
    "title_canon_sha256": "8fdfb0bcc3664f26c92367710e7c615300080356ec473b1d94da2bce66b3fcee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.3420",
    "kind": "arxiv",
    "version": 1
  }
}