ASTROSAT CZTI

Data Quality Report

Orbit 20171217_A04_112T01_9000001778_level2

Creation date: 2025-11-19T04:45:34.107894
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/AS1A04_112T01_9000001778cztM0_level2.fits modeM0/AS1A04_112T01_9000001778cztM0_level2_quad_clean.evt
Size (bytes)495,489,600675,887,040
Size472.5 MB 644.6 MB
Events in quadrant A2,979,2344,442,515
Events in quadrant B2,754,1564,158,528
Events in quadrant C2,986,6584,294,308
Events in quadrant D2,500,1083,794,386

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01219560
B01768680
C01124300
D01469410

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011220
B011220
C011220
D011220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0720
B0720
C0720
D0720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5512211662.115308%
B55122572010.376982%
C551224690.850840%
D5512230385.511411%

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 62317 55106 0 0 0.00% 0.00%
B 62317 55028 0 0 0.00% 0.00%
C 62317 55115 0 0 0.00% 0.00%
D 62317 55049 0 0 0.00% 0.00%

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 0 29 2963 11.28 776 727 198.3
A 7 110 2510 8.99 776 727 198.3
A 9 19 2289 7.88 776 727 198.3
B 2 9 2550 12.86 728 695 144.2
B 2 8 1889 8.28 728 695 144.2
B 3 17 1861 8.09 728 695 144.2
C 12 241 2135 6.92 787 731 203.0
C 2 191 2052 6.51 787 731 203.0
C 3 158 2036 6.43 787 731 203.0
D 3 14 1920 6.73 711 646 189.2
D 6 231 1808 6.14 711 646 189.2
D 7 3 1777 5.98 711 646 189.2

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