Pith Number

pith:6ZSDPI3U

pith:2012:6ZSDPI3U6O2IRTTVNY4N5UEWAI

not attested not anchored not stored refs pending

The SED Machine: A Spectrograph to Efficiently Classify Transient Events Discovered by PTF

Alexander R. Rudy, Andreas Ritter, Chow-Choong Ngeow, Edward Lin, Nick Konidaris, Robert Quimby, Sagi Ben-Ami

arxiv:1209.4699 v1 · 2012-09-21 · 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{6ZSDPI3U6O2IRTTVNY4N5UEWAI}

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	2026-05-18T01:54:20.338107Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f66437a374f3b488ce756e38ded096021398abe51226d014a02c219d89e5fdb1

Aliases

arxiv: 1209.4699 · arxiv_version: 1209.4699v1 · doi: 10.48550/arxiv.1209.4699 · pith_short_12: 6ZSDPI3U6O2I · pith_short_16: 6ZSDPI3U6O2IRTTV · pith_short_8: 6ZSDPI3U

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/6ZSDPI3U6O2IRTTVNY4N5UEWAI \
  | 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: f66437a374f3b488ce756e38ded096021398abe51226d014a02c219d89e5fdb1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "81666427c05c051f1480f140cefa2dc15bd04d682390b6477fc4f844c407cc53",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-09-21T04:33:41Z",
    "title_canon_sha256": "78d57b39385bdd48a8479646e3c70463125ee1d3b1a999a0fd55e8c2481685b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4699",
    "kind": "arxiv",
    "version": 1
  }
}