ASTROSAT CZTI

Data Quality Report

Orbit 57640

Creation date: 2026-05-25T09:35:20.696431
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_070T08_9000006576_57640cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57640cztM0_level2_quad_clean.evt
Size (bytes)652,199,04086,192,640
Size622.0 MB 82.2 MB
Events in quadrant A3,664,710629,621
Events in quadrant B3,051,755681,468
Events in quadrant C4,612,226594,048
Events in quadrant D12,306,563249,133

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153152
B0136012
C0180532
D0410482

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6527640.980542%
B6527891.363567%
C65272573.937490%
D6527392160.073541%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 8020 6811 7 7 0.09% 0.10%
B 8020 6811 15 15 0.19% 0.22%
C 8020 6808 160 160 2.00% 2.35%
D 8020 6761 3300 3300 41.15% 48.81%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 3 14 667052 3679.28 737 720 181.1
A 7 64 83590 457.58 737 720 181.1
A 7 223 25497 136.81 737 720 181.1
B 0 213 70375 454.14 731 706 153.4
B 12 111 18478 115.85 731 706 153.4
B 11 111 17106 106.91 731 706 153.4
C 15 224 1268500 6570.46 716 708 193.0
C 6 13 314187 1624.64 716 708 193.0
C 7 2 117549 605.54 716 708 193.0
D 15 142 4601029 33851.9 475 453 135.9
D 8 240 4342310 31948.19 475 453 135.9
D 8 160 1121859 8251.51 475 453 135.9

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter