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ACA Trending: Feb 2026

Click an image to enlarge it. The slopes are in Mag / day.

ACIS
Slope: -5.299e-05 STD: 4.191e-02

Slope: 1.212e-03 STD: 6.790e-02

Slope: -1.927e-03 STD: 5.534e-02
 

Slope: 6.881e-05 STD: 4.706e-02

Slope: 4.443e-04 STD: 5.202e-02

Slope: -8.615e-04 STD: 7.085e-02
 
HRCI
Slope: -1.687e-03 STD: 1.056e-02

Slope: 6.628e-03 STD: 1.402e-02

Slope: -3.294e-04 STD: 1.652e-02

Slope: 1.165e-03 STD: 2.168e-02
HRCS
Slope: nan STD: nan

Slope: nan STD: nan

Slope: nan STD: nan

Slope: nan STD: nan
IDID StringMagnitudeData Quality (%)Total Data
AverageMinMaxGoodMarginalBad
1 ACIS-1 7.249 6.743 7.373 100 0 0 41
2 ACIS-2 7.112 5.914 7.274 100 0 0 61
3 ACIS-3 7.394 7.048 7.552 100 0 0 13
4 ACIS-4 7.202 5.899 7.340 100 0 0 68
5 ACIS-5 7.211 6.090 7.357 100 0 0 71
6 ACIS-6 7.261 6.527 7.474 100 0 0 49
7 HRC-I-1 6.791 6.756 6.818 100 0 0 3
8 HRC-I-2 6.849 6.772 6.879 100 0 0 4
9 HRC-I-3 6.873 6.818 6.914 100 0 0 7
10 HRC-I-4 6.804 6.637 6.847 100 0 0 7
11 HRC-S-1 0.000 0.000 0.000 0 0 0 0
12 HRC-S-2 0.000 0.000 0.000 0 0 0 0
13 HRC-S-3 0.000 0.000 0.000 0 0 0 0
14 HRC-S-4 0.000 0.000 0.000 0 0 0 0

Level 1 Slot Trending: Feb 2026

Click an image to enlarge it. The slopes are per day.

SlotPos_ErrDelta MagnitudeAngyneaAngznea
0
Slope: 4.830e-03 STD: 1.231e-01

Slope: 4.830e-03 STD: 1.231e-01

Slope: -4.412e-06 STD: 1.864e-05

Slope: 1.864e-05 STD: 1.297e-03
1
Slope: 2.541e-03 STD: 5.652e-02

Slope: 2.541e-03 STD: 5.652e-02

Slope: 4.626e-06 STD: 4.228e-05

Slope: 4.228e-05 STD: 1.360e-03
2
Slope: 8.258e-03 STD: 9.625e-02

Slope: 8.258e-03 STD: 9.625e-02

Slope: -1.193e-05 STD: -7.512e-06

Slope: -7.512e-06 STD: 1.241e-03
3
Slope: -1.862e-03 STD: 7.136e-02

Slope: -1.862e-03 STD: 7.136e-02

Slope: 2.553e-04 STD: 3.733e-04

Slope: 3.733e-04 STD: 8.675e-03
4
Slope: -1.054e-03 STD: 5.324e-02

Slope: -1.054e-03 STD: 5.324e-02

Slope: 2.493e-04 STD: 3.901e-04

Slope: 3.901e-04 STD: 8.100e-03
5
Slope: 4.039e-04 STD: 1.702e-02

Slope: 4.039e-04 STD: 1.702e-02

Slope: 2.873e-04 STD: 4.050e-04

Slope: 4.050e-04 STD: 9.093e-03
6
Slope: -1.983e-04 STD: 3.988e-02

Slope: -1.983e-04 STD: 3.988e-02

Slope: 4.130e-04 STD: 5.613e-04

Slope: 5.613e-04 STD: 1.378e-02
7
Slope: 4.216e-04 STD: 1.629e-02

Slope: 4.216e-04 STD: 1.629e-02

Slope: 3.180e-04 STD: 4.225e-04

Slope: 4.225e-04 STD: 1.514e-02

Note

pos_err: ((ra_err*cos(dec))^2 + dec_err^2)^0.5
diff: mag_aca - mag_aca_avg
slope: slope agaist time (sec)
std: standard deviation of the data

When looking at Guide Stars

slotrms_ra_err (deg)rms_dec_err (deg) rms_delta_mag (marcsec)number avg_angynea (arcsec)avg_angznea (arcsec) number_nea goodmarginalbad
00.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
10.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
20.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
31.797e-051.521e-059.433e-03 993.453e-023.395e-02419790100.000.000.00
41.741e-051.634e-058.309e-03 993.746e-023.823e-02419772100.000.000.00
51.842e-051.624e-057.232e-03 994.302e-024.358e-02419765100.000.000.00
61.694e-051.754e-058.820e-03 984.893e-025.017e-02419763100.000.000.00
71.847e-051.641e-057.659e-03 995.253e-025.414e-02419694100.000.000.00
AVG1.115e-051.022e-055.182e-03 612.706e-022.751e-0226234862.500.000.00

When Looking at FIDs

slotrms_ra_err (deg)rms_dec_err (deg) rms_delta_mag (marcsec)number avg_angynea (arcsec)avg_angznea (arcsec) number_nea goodmarginalbad
00.000e+000.000e+001.144e-01 1081.059e-021.270e-02419789100.000.000.00
10.000e+000.000e+001.104e-01 1081.150e-021.469e-02419791100.000.000.00
20.000e+000.000e+001.103e-01 1081.109e-021.371e-02419798100.000.000.00
30.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
40.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
50.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
60.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
70.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
AVG0.000e+000.000e+004.189e-02 404.148e-035.137e-0315742237.500.000.00

When looking at Monitor Stars

slotrms_ra_err (deg)rms_dec_err (deg) rms_delta_mag (marcsec)number avg_angynea (arcsec)avg_angznea (arcsec) number_nea goodmarginalbad
00.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
10.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
20.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
30.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
40.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
50.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
60.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
70.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
AVG0.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00

If you have any questions about this page, please contact swolk@cfa.harvard.edu.