Calibration and alignment only not updating header
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I'm helping someone on the AAVSO forums that wanted to align and calibrate a time series but not stack them. I told him that ASTAp should be able to do that. Just choose "Calibration and alignment only" in the stack method. He tried that but reported that VPhot was saying the images had not been calibrated.
I just tried it myself using ASTAP version 2023.12.21, 64 bit (admittedly somewhat out of date) and looked at the aligned.fit files in the Results tab. Sure enough the header does not contain the calibration "DFB" data. Despite that, in the Calibration column of the Results tab, it does have "DFB" listed there.
Is this a bug or user error?
Herre is the log of what ASTAP did.
09:28:16 Stack method Calibration and alignment only
09:28:16 Oversize 0 pixels
09:28:16 Analysing lights.
09:28:21 Grayscale stack (classify by light filter unchecked)
09:28:21 Stacking (Calibration and alignment only), HOLD ESC key to abort.
09:28:21 Analysing darks.
09:28:21 Averaging darks.
09:28:21 Adding dark image 1 to dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Dark/Master_Dark_5_Secs.fit
09:28:21 Averaging darks.
09:28:21 Adding dark image 1 to dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Dark/Master_Dark_10_Secs.fit
09:28:21 Averaging darks.
09:28:21 Adding dark image 1 to dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Dark/Master_Dark_15_secs.fit
09:28:21 Averaging darks.
09:28:21 Adding dark image 1 to dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Dark/Master_Dark_20_Secs.fit
09:28:22 Averaging darks.
09:28:22 Adding dark image 1 to dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Dark/Master_Dark_30_Secs.fit
09:28:22 Averaging darks.
09:28:22 Adding dark image 1 to dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Dark/Master_Dark_60_Secs.fit
09:28:22 Averaging darks.
09:28:22 Adding dark image 1 to dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Dark/Master_Dark_120_Secs.fit
09:28:22 Averaging darks.
09:28:22 Adding dark image 1 to dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Dark/Master_Dark_180_Secs.fit
09:28:23 Master darks(s) ready.
09:28:23 Analysing flats.
09:28:23 Analysing flats
09:28:23 Averaging flat dark frames.
09:28:23 Adding flat-dark image 1 to flat-dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Bias/Master_Bias.fit
09:28:23 Combining flats.
09:28:23 Adding flat image 1 to flat average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Flat/Master_Flat_B_2_secs.fit
09:28:23 Combining flats and flat-darks.
09:28:23 Applying the combined flat-dark on the combined flat.
09:28:23 Averaging flat dark frames.
09:28:23 Adding flat-dark image 1 to flat-dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Bias/Master_Bias.fit
09:28:23 Combining flats.
09:28:23 Adding flat image 1 to flat average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Flat/Master_Flat_Clear_2_secs.fit
09:28:23 Combining flats and flat-darks.
09:28:23 Applying the combined flat-dark on the combined flat.
09:28:24 Averaging flat dark frames.
09:28:24 Adding flat-dark image 1 to flat-dark average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Bias/Master_Bias.fit
09:28:24 Combining flats.
09:28:24 Adding flat image 1 to flat average. /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Flat/Master_Flat_V_2_secs.fit
09:28:24 Combining flats and flat-darks.
09:28:24 Applying the combined flat-dark on the combined flat.
09:28:24 Master flat(s) ready.
09:28:24 Reference image selected based on quality (star_detections/sqr(hfd)) is: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_022.fits
09:28:24 ---------- Calibration & alignment for object: V0512 CAM -----------
09:28:24 Loading master dark file /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Dark/master_dark_1x180s_at_-10C_2025-02-24.fit
09:28:24 Loading master flat file /Users/bill/Desktop/Photometry/Calibration_Master_Tycho_Agema/Flat/master_flat_corrected_with_flat_darks_V_1xF_1xFD_2025-03-03.fit
09:28:24 Calibrating and aligning file: 1-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_008.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:25 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_008_aligned.fit
09:28:25 Calibrating and aligning file: 2-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_021.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:25 59 of 59 quads selected matching within 0.007 tolerance. Solution x:=0.999646x+ 0.004457y+ 17.323531, y:=-0.004387x+ 0.999963y+ 5.551675
09:28:26 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_021_aligned.fit
09:28:26 Calibrating and aligning file: 3-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_020.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:26 47 of 47 quads selected matching within 0.007 tolerance. Solution x:=0.999679x+ 0.004295y+ 15.544629, y:=-0.004129x+ 0.999994y+ 4.714344
09:28:26 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_020_aligned.fit
09:28:26 Calibrating and aligning file: 4-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_019.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:27 48 of 48 quads selected matching within 0.007 tolerance. Solution x:=0.999715x+ 0.004165y+ 15.727962, y:=-0.004093x+ 1.000095y+ 4.776225
09:28:27 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_019_aligned.fit
09:28:27 Calibrating and aligning file: 5-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_018.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:27 43 of 43 quads selected matching within 0.007 tolerance. Solution x:=0.999701x+ 0.003839y+ 14.360011, y:=-0.003761x+ 0.999880y+ 4.353149
09:28:28 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_018_aligned.fit
09:28:28 Calibrating and aligning file: 6-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_017.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:28 67 of 67 quads selected matching within 0.007 tolerance. Solution x:=0.999695x+ 0.003411y+ 12.567678, y:=-0.003372x+ 1.000039y+ 3.958578
09:28:28 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_017_aligned.fit
09:28:29 Calibrating and aligning file: 7-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_016.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:29 67 of 67 quads selected matching within 0.007 tolerance. Solution x:=0.999705x+ 0.003207y+ 11.938241, y:=-0.003142x+ 0.999882y+ 3.794993
09:28:29 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_016_aligned.fit
09:28:29 Calibrating and aligning file: 8-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_015.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:30 37 of 37 quads selected matching within 0.007 tolerance. Solution x:=0.999799x+ 0.002649y+ 10.272942, y:=-0.002645x+ 0.999911y+ 2.919192
09:28:30 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_015_aligned.fit
09:28:30 Calibrating and aligning file: 9-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_014.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:30 36 of 36 quads selected matching within 0.007 tolerance. Solution x:=0.999862x+ 0.002364y+ 8.786385, y:=-0.002234x+ 0.999990y+ 2.425536
09:28:31 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_014_aligned.fit
09:28:31 Calibrating and aligning file: 10-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_013.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:31 43 of 43 quads selected matching within 0.007 tolerance. Solution x:=0.999801x+ 0.002069y+ 8.390532, y:=-0.001971x+ 1.000067y+ 1.966102
09:28:31 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_013_aligned.fit
09:28:32 Calibrating and aligning file: 11-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_012.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:32 11 of 11 quads selected matching within 0.007 tolerance. Solution x:=0.999931x+ 0.001634y+ 5.714495, y:=-0.001532x+ 1.000018y+ 1.457707
09:28:32 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_012_aligned.fit
09:28:32 Calibrating and aligning file: 12-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_011.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:33 28 of 28 quads selected matching within 0.007 tolerance. Solution x:=0.999899x+ 0.001153y+ 4.437010, y:=-0.001187x+ 0.999980y+ 1.128661
09:28:33 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_011_aligned.fit
09:28:33 Calibrating and aligning file: 13-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_010.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:33 25 of 25 quads selected matching within 0.007 tolerance. Solution x:=0.999933x+ 0.000926y+ 3.233124, y:=-0.000865x+ 1.000041y+ 0.725466
09:28:34 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_010_aligned.fit
09:28:34 Calibrating and aligning file: 14-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_009.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:34 38 of 38 quads selected matching within 0.007 tolerance. Solution x:=0.999954x+ 0.000370y+ 1.288426, y:=-0.000315x+ 0.999901y+ 0.259080
09:28:34 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_009_aligned.fit
09:28:35 Calibrating and aligning file: 15-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_022.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:35 78 of 78 quads selected matching within 0.007 tolerance. Solution x:=0.999617x+ 0.004748y+ 17.335484, y:=-0.004674x+ 1.000040y+ 5.290336
09:28:35 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_022_aligned.fit
09:28:35 Calibrating and aligning file: 16-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_007.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:36 100 of 100 quads selected matching within 0.007 tolerance. Solution x:=1.000015x+ -0.000334y+ -1.478667, y:=0.000240x+ 1.000013y+ -0.421705
09:28:36 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_007_aligned.fit
09:28:36 Calibrating and aligning file: 17-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_006.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:36 64 of 64 quads selected matching within 0.007 tolerance. Solution x:=0.999979x+ -0.000763y+ -2.593843, y:=0.000561x+ 0.999887y+ -0.409728
09:28:37 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_006_aligned.fit
09:28:37 Calibrating and aligning file: 18-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_005.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:37 54 of 54 quads selected matching within 0.007 tolerance. Solution x:=0.999974x+ -0.001204y+ -4.370433, y:=0.001007x+ 0.999947y+ -0.961183
09:28:37 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_005_aligned.fit
09:28:37 Calibrating and aligning file: 19-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_004.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:38 57 of 57 quads selected matching within 0.007 tolerance. Solution x:=0.999988x+ -0.001585y+ -6.203239, y:=0.001443x+ 0.999875y+ -1.683233
09:28:38 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_004_aligned.fit
09:28:38 Calibrating and aligning file: 20-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_003.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:38 26 of 26 quads selected matching within 0.007 tolerance. Solution x:=1.000112x+ -0.002115y+ -8.917285, y:=0.002043x+ 1.000080y+ -1.959689
09:28:39 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_003_aligned.fit
09:28:39 Calibrating and aligning file: 21-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_002.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:39 55 of 55 quads selected matching within 0.007 tolerance. Solution x:=0.999844x+ -0.002765y+ -10.561673, y:=0.002418x+ 0.999785y+ -2.867072
09:28:39 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_002_aligned.fit
09:28:39 Calibrating and aligning file: 22-22 "/Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_001.fits dark compensated to light average. Using 1 dark(s), 1 flat(s), 1 flat-dark(s)
09:28:40 3 of 3 quads selected matching within 0.007 tolerance. Solution x:=1.000240x+ -0.003191y+ -11.348056, y:=0.002857x+ 0.999728y+ -3.094562
09:28:40 New aligned image created: /Users/bill/Desktop/Photometry/Ekos/V0512_Cam/2024-12-08/V/V0512_Cam_Light_V_180_secs_001_aligned.fit
Finished in 24 sec. The FITS header contains a detailed history.
09:33:54 Analysing lights
09:34:00 Analysing lights done.
I decided to download the latest version (20525-03-07) to see if it gave different results. It did! I now see the CALSTAT key in the header with a "BFD" value.
Good it is solved.
In CALSTAT
D stands for dark applied
F for flat applied.
B for bias/flat-dark applied.
S for stacked.
Cheers, Han
Hi.
Han, these images show photometry of a set of images of one area of the sky (around the variable star v1400 Tau). The v1400_1 and asas1 are the result of a sequence of calibration and alignment, then photometry. (I did this by accident, didn't realize it was wrong).
v1400_2 asas2 is the result of only calibration and then photometry.
As can be seen, in the first case the result is strikingly smooth and of high quality, although not quite right. Is there no way to somehow utilize the quality from one variant and the correctness of the measurements from the second?
Thanks.
Hi Aleh,
That is weird and requires an investigation. Can you share all files to me?
Cheers, Han