ASTROSAT CZTI

Data Quality Report

Orbit 56146

Creation date: 2026-02-13T00:27:08.123694
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_083T04_9000006550_56146cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56146cztM0_level2_quad_clean.evt
Size (bytes)758,082,24087,215,040
Size723.0 MB 83.2 MB
Events in quadrant A5,091,844626,397
Events in quadrant B3,725,032681,193
Events in quadrant C12,818,396327,252
Events in quadrant D5,899,758531,594

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0197561
B0158051
C0427561
D0222991

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67993074.515370%
B67992163.176938%
C6800357952.632353%
D68006149.029412%

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 7548 6798 268 268 3.55% 3.94%
B 7548 6798 120 120 1.59% 1.77%
C 7550 6801 3607 3607 47.77% 53.04%
D 7550 6801 652 652 8.64% 9.59%

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 7 64 1245891 7035.41 708 689 177.0
A 3 14 332241 1873.27 708 689 177.0
A 0 8 310317 1749.4 708 689 177.0
B 5 185 212373 1395.5 709 684 151.7
B 4 171 188161 1235.89 709 684 151.7
B 0 171 119029 780.16 709 684 151.7
C 9 38 8480489 57100.03 542 539 148.5
C 15 147 1029235 6926.76 542 539 148.5
C 15 148 707839 4762.63 542 539 148.5
D 11 129 1424436 7534.6 665 635 189.0
D 2 249 765237 4046.19 665 635 189.0
D 8 240 396458 2094.65 665 635 189.0

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