Pith Number

pith:MP66GTUP

pith:2010:MP66GTUPFCVOXG5GQOT5VDITTY

not attested not anchored not stored refs pending

The Making of the Chandra X-ray Observatory: the Project Scientist's Perspective

Martin C. Weisskopf

arxiv:1003.1990 v1 · 2010-03-09 · 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{MP66GTUPFCVOXG5GQOT5VDITTY}

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	2026-05-18T02:08:35.731357Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

63fde34e8f28aaeb9ba683a7da8d139e0d518a891da64a6b8f7e93b2a8b18f69

Aliases

arxiv: 1003.1990 · arxiv_version: 1003.1990v1 · doi: 10.48550/arxiv.1003.1990 · pith_short_12: MP66GTUPFCVO · pith_short_16: MP66GTUPFCVOXG5G · pith_short_8: MP66GTUP

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/MP66GTUPFCVOXG5GQOT5VDITTY \
  | 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: 63fde34e8f28aaeb9ba683a7da8d139e0d518a891da64a6b8f7e93b2a8b18f69

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3f35de269056a512c03029eafa7a93d11142f6f8e9a9415a1522630da09f23f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2010-03-09T22:03:15Z",
    "title_canon_sha256": "c4fc4e0399af1cb4c843d000ff9ef07982990feff5e9fcd0ed4610df2048e5d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1003.1990",
    "kind": "arxiv",
    "version": 1
  }
}