AGASC ID 725879064

Info

Last Obs. 2024:091:01:51
magcatalog 8.59 ± 0.08
mag3 arcsec 8.51 ± 0.02
mag5 arcsec 8.51 ± 0.02
Nobs 9 (0 bad)
fok 99.4%
f3 arcsec 100.0%
f5 arcsec 100.0%

Timeline

Observation Info

OBSID Time Slot Row Col N Nmag est ok Nout fmag est ok fdr3 fdbox5 fmag est ok 3 ⟨ δ mag ⟩ 100s ⟨ mag ⟩ σmag Comments
11779 2009:329:06:23:17.175 4 -378.3 -290.4 16243 16158 19 99.9% 100.0% 100.0% 99.9% 0.03 8.49 0.00 --
21660 2018:214:13:21:28.933 6 59.5 -147.9 9906 9814 7 99.9% 100.0% 100.0% 99.9% 0.03 8.53 0.00 --
47331 2020:094:23:31:31.475 4 71.3 456.1 1219 1093 1 93.9% 100.0% 100.0% 93.9% 0.03 8.51 0.00 --
47329 2020:095:04:16:40.782 5 210.5 -56.0 1657 1554 55 97.2% 99.4% 99.5% 96.6% 0.04 8.54 0.00 --
23316 2020:201:16:31:22.714 7 27.9 -158.0 5027 4933 2 99.6% 100.0% 100.0% 99.6% 0.02 8.53 0.00 --
23331 2020:202:07:33:43.977 7 27.2 -157.7 5025 4941 5 99.9% 100.0% 100.0% 99.9% 0.02 8.53 0.00 --
25187 2022:087:00:44:03.462 3 22.9 182.1 9655 9477 7 98.9% 100.0% 100.0% 98.9% 0.05 8.52 0.00 --
43576 2024:090:23:00:07.722 0 -461.0 -428.7 810 764 0 99.9% 100.0% 100.0% 99.9% 0.03 8.53 0.00 --
43574 2024:091:01:51:07.001 0 -465.4 -423.9 326 267 2 97.4% 100.0% 100.0% 97.4% 0.03 8.52 0.00 --

  • sample: One sample of ACA image telemetry. This could be a real image readout or it could be a null 4x4 image when the ACA is not tracking. Be aware that the sample period is faster for null 4x4 images (1.025 sec) than for typical 6x6 or 8x8 tracked images (2.05 or 4.1 sec respectively).
  • Kalman samples: Subset of samples when ACA could be tracking stars (AOPCADMD == NPNT & AOACASEQ == KALM)
  • dr3: Subset of tracked Kalman samples with radial centroid residual < 3 arcsec. This corresponds to "high quality" readouts. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • dbox5: Subset of tracked Kalman samples with centroid residual within a 5 arcsec box. This corresponds to spatial filter used by the OBC for inclusion in Kalman filter. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • track: Subset of Kalman samples where the image is being tracked (AOACFCT == TRAK)
  • sat_pix: Subset of Kalman samples with saturated pixel flag OK (AOACISP == OK)
  • ion_rad: Subset of Kalman samples with ionizing radiation flag OK (AOACIIR == OK)
  • mag_est_ok: Subset of Kalman samples that have a magnitude estimate (track & ion_rad)
  • n_total: Total number of sample regardless of OBC PCAD status
  • n: Synonym for n_total
  • n_kalman: Number of Kalman samples
  • n_dr3: Number of dr3 samples.
  • n_dbox5: Number of dbox5 samples.
  • n_track: Number of track samples.
  • n_ok_3: Number of (track & sat_pix & ion_rad & dr3) samples
  • n_ok_5: Number of (track & sat_pix & ion_rad & dbox5) samples
  • n_mag_est_ok: Number of (track & ion_rad) samples
  • n_mag_est_ok_3: Number of (track & ion_rad & dr3) samples
  • n_mag_est_ok_5: Number of (track & ion_rad & dbox5) samples
  • f_dr3: Fraction of mag-est-ok samples with centroid residual < 3 arcsec((mag_est_ok & n_dr3)/n_mag_est_ok)
  • f_dbox5: Fraction of mag-est-ok samples with centroid within 5 arcsec box((mag_est_ok & n_dbox5)/n_mag_est_ok)
  • f_mag_est_ok: n_mag_est_ok_3/n_kalman. This is a measure of the fraction of time during an observation that a magnitude estimate is available.
  • f_mag_est_ok_3: n_mag_est_ok_3/n_kalman.
  • f_mag_est_ok_5: n_mag_est_ok_5/n_kalman.
  • f_ok: n_ok_5 / n_kalman. Same as f_ok_5
  • f_ok_3: n_ok_3 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting high-quality star centroids.
  • f_ok_5: n_ok_5 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting any star centroid at all. This includes measurements out to 5 arcsec box halfwidth, so potentially 7 arcsec radial offset.