ASTROSAT CZTI

Data Quality Report

Orbit 57759

Creation date: 2026-06-01T12:24:13.690661
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_083T16_9000006580_57759cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57759cztM0_level2_quad_clean.evt
Size (bytes)461,306,88086,785,920
Size439.9 MB 82.8 MB
Events in quadrant A2,591,638580,690
Events in quadrant B3,917,545616,552
Events in quadrant C6,986,726486,662
Events in quadrant D3,107,485518,853

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0124481
B0158961
C0250301
D0138001

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6085801.314708%
B60852433.993426%
C608596815.907970%
D60861171.922445%

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 6945 6086 3 3 0.04% 0.05%
B 6945 6086 69 69 0.99% 1.13%
C 6945 6086 785 785 11.30% 12.90%
D 6945 6086 51 51 0.73% 0.84%

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 13 248 19415 117.29 646 629 160.2
A 3 128 18882 113.96 646 629 160.2
A 3 245 17251 103.78 646 629 160.2
B 4 80 522423 3871.11 634 610 134.8
B 4 171 227904 1686.2 634 610 134.8
B 4 158 151479 1119.23 634 610 134.8
C 15 224 1852872 11391.13 596 588 162.6
C 12 254 1153835 7092.21 596 588 162.6
C 15 208 1003586 6168.21 596 588 162.6
D 8 240 137799 780.63 626 598 175.8
D 2 153 137656 779.82 626 598 175.8
D 3 12 135568 767.94 626 598 175.8

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