ASTROSAT CZTI

Data Quality Report

Orbit 20200504_A07_027T16_9000003642_level2

Creation date: 2025-12-10T20:40:27.994868
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/AS1A07_027T16_9000003642cztM0_level2.fits modeM0/AS1A07_027T16_9000003642cztM0_level2_quad_clean.evt
Size (bytes)593,484,480437,483,520
Size566.0 MB 417.2 MB
Events in quadrant A3,711,9942,422,104
Events in quadrant B3,538,3322,436,233
Events in quadrant C3,532,6182,259,112
Events in quadrant D3,150,6262,091,121

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01070
B01070
C01070
D01070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01263830
B01238110
C01583080
D01688560

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011980
B011980
C011980
D011980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A588647181.219761%
B588646581.117831%
C5886441817.102813%
D5886433565.701278%

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 69674 58863 0 0 0.00% 0.00%
B 69674 58864 0 0 0.00% 0.00%
C 69674 58855 0 0 0.00% 0.00%
D 69674 58783 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 3445 10.88 965 909 233.1
A 7 110 2999 8.97 965 909 233.1
A 9 19 2713 7.74 965 909 233.1
B 2 9 2853 10.72 936 897 182.4
B 2 8 2418 8.34 936 897 182.4
B 5 128 2359 8.01 936 897 182.4
C 3 234 2460 6.71 933 879 235.7
C 3 126 2451 6.67 933 879 235.7
C 12 241 2386 6.39 933 879 235.7
D 10 189 2251 6.01 899 826 237.2
D 6 67 2226 5.9 899 826 237.2
D 15 46 2218 5.87 899 826 237.2

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