ASTROSAT CZTI

Data Quality Report

Orbit 20210512_T04_002T01_9000004374_level2

Creation date: 2021-05-15T14:31:54.379351
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/AS1T04_002T01_9000004374cztM0_level2_bc.evt modeM0/AS1T04_002T01_9000004374cztM0_level2_quad_clean.evt
Size (bytes)988,395,840330,013,440
Size942.6 MB 314.7 MB
Events in quadrant A4,707,4302,150,798
Events in quadrant B11,859,0792,145,773
Events in quadrant C4,816,8802,079,055
Events in quadrant D6,956,0482,014,181

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0478180
B0718000
C0505090
D0573180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04760
B04760
C04760
D04760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A233321940.831476%
B233324581.962969%
C2333215636.698954%
D233329404.028802%

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 29365 23332 0 0 0.00% 0.00%
B 29364 23329 3 3 0.01% 0.01%
C 29364 23333 2 2 0.01% 0.01%
D 29364 23333 77 77 0.26% 0.33%

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 8 192 56006 210.57 1188 1167 260.4
A 14 239 43582 162.86 1188 1167 260.4
A 13 254 42171 157.45 1188 1167 260.4
B 6 159 6397969 27820.49 1192 1165 229.9
B 0 229 829252 3601.45 1192 1165 229.9
B 4 187 26752 111.28 1192 1165 229.9
C 3 233 204488 759.22 1119 1114 267.9
C 14 254 157757 584.77 1119 1114 267.9
C 10 22 56082 205.2 1119 1114 267.9
D 13 249 880821 3010.14 1139 1107 292.3
D 13 104 493403 1684.5 1139 1107 292.3
D 8 195 420722 1435.8 1139 1107 292.3

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