Pith Number

pith:7PTK6WD6

pith:2009:7PTK6WD6XFQJ6GAI2PK4ABI7HR

not attested not anchored not stored refs pending

Non-linear Least Squares Fitting in IDL with MPFIT

Craig B. Markwardt (U. Maryland, NASA/GSFC)

arxiv:0902.2850 v1 · 2009-02-17 · 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{7PTK6WD6XFQJ6GAI2PK4ABI7HR}

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

13 papers in Pith

Decoupled Kinematics and Excitation in the Compton-thick AGN NGC 6552: Spatially Resolved KOOLS-IFU Observations

Full-Disk Spectroscopy of the Solar Corona Across a Solar Cycle with Hinode/EIS

A comparison between Galactic magnetic field models and polarized synchrotron emission with C-BASS at 4.76 GHz and S-PASS at 2.3 GHz

A Sample of Active Galactic Nuclei with Intermediate-mass Black Holes Extended to $z \approx$ 0.6

Clumps in spiral galaxies at $z \lesssim 3$: Disentangling two spatial modes of star formation

Receipt and verification

First computed	2026-07-04T15:49:11.919288Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fbe6af587eb9609f1808d3d5c0051f3c4bc889f1c26fa2274e014a73e997bf18

Aliases

arxiv: 0902.2850 · arxiv_version: 0902.2850v1 · doi: 10.48550/arxiv.0902.2850 · pith_short_12: 7PTK6WD6XFQJ · pith_short_16: 7PTK6WD6XFQJ6GAI · pith_short_8: 7PTK6WD6

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/7PTK6WD6XFQJ6GAI2PK4ABI7HR \
  | 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: fbe6af587eb9609f1808d3d5c0051f3c4bc889f1c26fa2274e014a73e997bf18

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4aea6f395137a7e51084686281fc00b88daad7698e004cf3cbce57d65f5af83",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-02-17T08:01:04Z",
    "title_canon_sha256": "ef5fdd1140541824cd6c297191f83e47873a332470646b1729cdf248c1ef7b92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.2850",
    "kind": "arxiv",
    "version": 1
  }
}