Pith Number

pith:FDQ6C733

pith:2007:FDQ6C733OUAXDVFTD5ZDRRNGFK

not attested not anchored not stored refs pending

Chandra Observations of Supernova 1987A

David N. Burrows, Gordon P. Garmire (Penn State), Judith L. Racusin (Penn State), Richard McCray (Colorado), Sangwook Park, Svetozar A. Zhekov (Space Res Inst)

arxiv:0704.0209 v1 · 2007-04-02 · 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{FDQ6C733OUAXDVFTD5ZDRRNGFK}

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.

Cited by

1 paper in Pith

Chandra X-Ray Imaging and Spatially Resolved Spectroscopy of SN 1987A: Energy-Dependent Morphology of the Equatorial Ring

Receipt and verification

First computed	2026-07-04T15:44:55.975939Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28e1e17f7b750171d4b31f7238c5a62a94952b07d42d50434fe4ff6a7d5447b6

Aliases

arxiv: 0704.0209 · arxiv_version: 0704.0209v1 · doi: 10.48550/arxiv.0704.0209 · pith_short_12: FDQ6C733OUAX · pith_short_16: FDQ6C733OUAXDVFT · pith_short_8: FDQ6C733

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/FDQ6C733OUAXDVFTD5ZDRRNGFK \
  | 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: 28e1e17f7b750171d4b31f7238c5a62a94952b07d42d50434fe4ff6a7d5447b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a240d6b74a9f52404e118946ef6fc1b3613648d2b0577555cf683abb809458e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-04-02T14:58:36Z",
    "title_canon_sha256": "7e4053a19f00159430a54fc99baff33bb176d4942fbe9724f5107f16c01d68fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0704.0209",
    "kind": "arxiv",
    "version": 1
  }
}