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{"receipt_id":"agent1-2","seq":2,"branch_id":"agent1","kind":"command","cmd":"ls -la skypy/galaxies/","path":null,"exit_code":0,"stdout_tail":"total 56\ndrwxrwxrwx 1 root root   184 Apr 30 16:36 .\ndrwxrwxrwx 1 root root   168 Apr 30 16:36 ..\n-rw-r--r-- 1 root root   458 Feb 22  2026 __init__.py\n-rw-r--r-- 1 root root  5585 Feb 22  2026 _schechter.py\n-rw-r--r-- 1 root root  2100 Feb 22  2026 luminosity.py\n-rw-r--r-- 1 root root 10410 Feb 22  2026 morphology.py\n-rw-r--r-- 1 root root  9565 Feb 22  2026 redshift.py\n-rw-r--r-- 1 root root  8740 Feb 22  2026 spectrum.py\n-rw-r--r-- 1 root root  2365 Feb 22  2026 stellar_mass.py\ndrwxrwxrwx 1 root root   314 Oct  3 22:36 tests\n","stderr_tail":"","stdout_sha256":"8a8971dc03efe19ae04efeef4afee61d1767f7011605d83d3005cd461b90ae1f","log_path":"~/dev/nebius-hackathon/pilot/v2-arm-lightning/skypyproject__skypy-573/runs/pilot-skypyproject__skypy-573-c53b75b1f4/logs/agent1/agent1-2.log","tree_digest":null,"tree_download_s":null,"started_at":"2026-10-03T22:37:17.226053Z","duration_s":0.003816,"timed_out":false,"image_before":"dcb722f5-42d4-4f3c-9494-abd92c6c85be","image_after":"183c2beb-1f67-42e3-81f0-ab2a7d0f9238","junit":null,"diff":null,"patch_sha256":null,"dropped_paths":[],"snapshot_sha":null}
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{"receipt_id":"agent1-4","seq":4,"branch_id":"agent1","kind":"command","cmd":"cd /skypy && python -m pytest skypy/galaxies/tests/test_velocity_dispersion.py::test_schechter_vdf -v 2>&1","path":null,"exit_code":0,"stdout_tail":"============================= test session starts ==============================\nplatform linux -- Python 3.10.19, pytest-9.0.2, pluggy-1.6.0 -- /usr/local/bin/python\ncachedir: .pytest_cache\nhypothesis profile 'default'\n\nRunning tests with skypy version 0.6.dev19+gdf2536974.\nRunning tests in skypy/galaxies/tests/test_velocity_dispersion.py::test_schechter_vdf.\n\nDate: 2026-10-03T22:37:28\n\nPlatform: Linux-7.0.6-x86_64-with-glibc2.41\n\nExecutable: /usr/local/bin/python\n\nFull Python Version: \n3.10.19 (main, Dec 30 2025, 00:42:16) [GCC 14.2.0]\n\nencodings: sys: utf-8, locale: UTF-8, filesystem: utf-8\nbyteorder: little\nfloat info: dig: 15, mant_dig: 15\n\nPackage versions: \nNumpy: 1.24.4\nScipy: 1.10.1\nMatplotlib: not available\nh5py: not available\nscikit-image: not available\n\nUsing Astropy options: remote_data: none.\n\nrootdir: /skypy\nconfigfile: setup.cfg\nplugins: hypothesis-6.151.9, arraydiff-0.6.1, astropy-0.11.0, astropy-header-0.2.2, cov-7.0.0, doctestplus-1.7.1, filter-subpackage-0.2.0, mock-3.15.1, remotedata-0.4.1, rerunfailures-16.1\ncollecting ... collected 1 item\n\nskypy/galaxies/tests/test_velocity_dispersion.py::test_schechter_vdf PASSED [100%]\n\n=============================== warnings summary ===============================\nskypy/galaxies/spectrum.py:8\n  /skypy/skypy/galaxies/spectrum.py:8: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n    from pkg_resources import resource_filename\n\n-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html\n========================= 1 passed, 1 warning in 0.57s =========================\n","stderr_tail":"","stdout_sha256":"a3e4feae2ea95d5c06c8ce6bd71d8e39954eaf3b590dc1c873d9022c0ebadf26","log_path":"~/dev/nebius-hackathon/pilot/v2-arm-lightning/skypyproject__skypy-573/runs/pilot-skypyproject__skypy-573-c53b75b1f4/logs/agent1/agent1-4.log","tree_digest":null,"tree_download_s":null,"started_at":"2026-10-03T22:37:26.760836Z","duration_s":2.247974,"timed_out":false,"image_before":"bbf5f01a-0326-4f19-a49e-97a478d23c49","image_after":"c91019ea-3700-41ba-b40b-ff99a2017dc7","junit":null,"diff":null,"patch_sha256":null,"dropped_paths":[],"snapshot_sha":null}
{"receipt_id":"agent1-5","seq":5,"branch_id":"agent1","kind":"command","cmd":"cd /skypy && python -m pytest skypy/galaxies/tests/ -v 2>&1 | tail -30","path":null,"exit_code":0,"stdout_tail":"skypy/galaxies/tests/test_luminosity.py::test_schechter_lf_magnitude PASSED [  8%]\nskypy/galaxies/tests/test_morphology.py::test_angular_size PASSED        [ 13%]\nskypy/galaxies/tests/test_morphology.py::test_beta_ellipticity PASSED    [ 17%]\nskypy/galaxies/tests/test_morphology.py::test_late_type_lognormal_size PASSED [ 21%]\nskypy/galaxies/tests/test_morphology.py::test_early_type_lognormal_size PASSED [ 26%]\nskypy/galaxies/tests/test_morphology.py::test_linear_lognormal_size PASSED [ 30%]\nskypy/galaxies/tests/test_morphology.py::test_ryden04_ellipticity PASSED [ 34%]\nskypy/galaxies/tests/test_redshift.py::test_schechter_lf_redshift PASSED [ 39%]\nskypy/galaxies/tests/test_redshift.py::test_schechter_smf_redshift PASSED [ 43%]\nskypy/galaxies/tests/test_redshift.py::test_redshifts_from_comoving_density PASSED [ 47%]\nskypy/galaxies/tests/test_redshift.py::test_smail PASSED                 [ 52%]\nskypy/galaxies/tests/test_schechter.py::test_schechter_lf PASSED         [ 56%]\nskypy/galaxies/tests/test_schechter.py::test_schechter_smf PASSED        [ 60%]\nskypy/galaxies/tests/test_spectrum.py::test_sampling_coefficients PASSED [ 65%]\nskypy/galaxies/tests/test_spectrum.py::test_kcorrect_magnitudes PASSED   [ 69%]\nskypy/galaxies/tests/test_spectrum.py::test_kcorrect_stellar_mass PASSED [ 73%]\nskypy/galaxies/tests/test_spectrum.py::test_kcorrect_stellar_mass_remain PASSED [ 78%]\nskypy/galaxies/tests/test_spectrum.py::test_kcorrect_metallicity PASSED  [ 82%]\nskypy/galaxies/tests/test_spectrum.py::test_kcorrect_star_formation_rates PASSED [ 86%]\nskypy/galaxies/tests/test_stellar_mass.py::test_exponential_distribution PASSED [ 91%]\nskypy/galaxies/tests/test_stellar_mass.py::test_stellar_masses PASSED    [ 95%]\nskypy/galaxies/tests/test_velocity_dispersion.py::test_schechter_vdf PASSED [100%]\n\n=============================== warnings summary ===============================\nskypy/galaxies/spectrum.py:8\n  /skypy/skypy/galaxies/spectrum.py:8: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n    from pkg_resources import resource_filename\n\n-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html\n======================== 23 passed, 1 warning in 1.56s =========================\n","stderr_tail":"","stdout_sha256":"a704d3394539658a5bc0c524ae1d34eeaddcc5e350773a6aaa9971878c77cb0e","log_path":"~/dev/nebius-hackathon/pilot/v2-arm-lightning/skypyproject__skypy-573/runs/pilot-skypyproject__skypy-573-c53b75b1f4/logs/agent1/agent1-5.log","tree_digest":null,"tree_download_s":null,"started_at":"2026-10-03T22:37:32.041868Z","duration_s":3.1246400000000003,"timed_out":false,"image_before":"c91019ea-3700-41ba-b40b-ff99a2017dc7","image_after":"30d1ab3d-ff9f-4175-93ce-227520e4d3c3","junit":null,"diff":null,"patch_sha256":null,"dropped_paths":[],"snapshot_sha":null}
{"receipt_id":"agent1-6","seq":6,"branch_id":"agent1","kind":"diff","cmd":"compute patch in executor staging agent1-264c20f39012452690bfd87c60f746cb: /opt/homebrew/Cellar/git/2.53.0/bin/git -c core.hooksPath=/dev/null -c core.attributesFile=/dev/null -c diff.external= -c core.quotePath=false add -A && /opt/homebrew/Cellar/git/2.53.0/bin/git -c core.hooksPath=/dev/null -c core.attributesFile=/dev/null -c diff.external= -c core.quotePath=false diff --cached --binary --no-ext-diff --no-textconv --no-renames 7bb91046e6be9c693fbe02d49c8c2f07ea297013","path":null,"exit_code":0,"stdout_tail":"diff --git a/skypy/galaxies/velocity_dispersion.py b/skypy/galaxies/velocity_dispersion.py\nnew file mode 100644\nindex 0000000..527d026\n--- /dev/null\n+++ b/skypy/galaxies/velocity_dispersion.py\n@@ -0,0 +1,84 @@\n+\"\"\"Velocity dispersion function sampler.\"\"\"\n+\n+import numpy as np\n+from scipy.special import gamma\n+from scipy.integrate import cumtrapz\n+\n+\n+def schechter_vdf(alpha, beta, vd_star, vd_min, vd_max, size, resolution=3000):\n+    r'''Sample velocity dispersions from a Schechter-type velocity dispersion function.\n+\n+    Sample velocity dispersions of lens galaxies following the Schechter-type\n+    velocity dispersion function described in Choi et al. (2017).\n+\n+    The probability density function is:\n+\n+    .. math::\n+\n+        p(\\sigma_v) \\, d\\sigma_v = \\phi_*\n+        \\left(\\frac{\\sigma_v}{\\sigma_*}\n+        \\right)^{\\alpha}\n+        \\exp\\left[-\\left(\\frac{\\sigma_v}{\\sigma_*}\n+        \\right)^{\\beta}\\right]\n+        \\frac{\\beta}{\\Gamma(\\alpha/\\beta)}\n+        \\frac{d\\sigma_v}{\\sigma_v}\n+\n+    where :math:`\\sigma_v` is the velocity dispersion, :math:`\\sigma_*` is the\n+    characteristic velocity dispersion, :math:`\\alpha` and :math:`\\beta` are\n+    power-law and exponential slope parameters, and :math:`\\phi_*` is a\n+    normalization constant.\n+\n+    Parameters\n+    ----------\n+    alpha : float\n+        Power-law index of the velocity dispersion function.\n+    beta : float\n+        Exponential slope parameter of the velocity dispersion function.\n+    vd_star : float\n+        Characteristic velocity dispersion :math:`\\sigma_*`.\n+    vd_min : float\n+        Minimum velocity dispersion cutoff.\n+    vd_max : float\n+        Maximum velocity dispersion cutoff.\n+    size : int\n+        Number of samples to draw.\n+    resolution : int, optional\n+        Resolution of the function grid (default: 3000).\n+\n+    Returns\n+    -------\n+    samples : np.ndarray\n+        Array of velocity dispersion samples drawn from the VDF.\n+\n+    References\n+    ----------\n+    Choi, Y.-Y., Park, C., & Vogeley, M. S. (2017).\n+    \"The Velocity Dispersion Function of Early-Type Galaxies.\"\n+    The Astrophysical Journal, 836(2), 205.\n+\n+    '''\n+    # Create velocity dispersion grid\n+    vd_grid = np.linspace(vd_min, vd_max, resolution)\n+\n+    # Calculate the unnormalized PDF\n+    pdf = (vd_grid / vd_star)**alpha * np.exp(-(vd_grid / vd_star)**beta) * \\\n+          (beta / gamma(alpha / beta)) * (1 / vd_grid)\n+\n+    # Normalize the PDF using trapezoidal integration\n+    integral = np.trapz(pdf, vd_grid)\n+    pdf_normalized = pdf / integral\n+\n+    # Calculate CDF using cumulative integration\n+    cdf = cumtrapz(pdf_normalized, vd_grid, initial=0)\n+\n+    # Normalize CDF to ensure it goes from 0 to 1\n+    cdf = cdf / cdf[-1]\n+\n+    # Inverse transform sampling\n+    # Generate uniform random numbers\n+    u = np.random.uniform(0, 1, size)\n+\n+    # Interpolate to find the corresponding velocity dispersion values\n+    samples = np.interp(u, cdf, vd_grid)\n+\n+    return samples\n","stderr_tail":"","stdout_sha256":"8deb35aed645f98baef18ca639c60570f91d3077058dbde5c26721c113ee1076","log_path":null,"tree_digest":"4a222bad466e6de1de6aae0a05baa7917d7654a35a5b3da959d74a10069d13ce","tree_download_s":2.187197000021115,"started_at":"2026-10-03T22:37:45.447905Z","duration_s":0.03851083409972489,"timed_out":false,"image_before":"30d1ab3d-ff9f-4175-93ce-227520e4d3c3","image_after":"30d1ab3d-ff9f-4175-93ce-227520e4d3c3","junit":null,"diff":{"files":[{"path":"skypy/galaxies/velocity_dispersion.py","added":84,"deleted":0,"category":"source","status":"added"}],"patch_sha256":"8deb35aed645f98baef18ca639c60570f91d3077058dbde5c26721c113ee1076","patch_path":"~/dev/nebius-hackathon/pilot/v2-arm-lightning/skypyproject__skypy-573/runs/pilot-skypyproject__skypy-573-c53b75b1f4/artifacts/agent1/agent1-6.patch"},"patch_sha256":"8deb35aed645f98baef18ca639c60570f91d3077058dbde5c26721c113ee1076","dropped_paths":[],"snapshot_sha":"7bb91046e6be9c693fbe02d49c8c2f07ea297013"}