ASTROSAT CZTI

Data Quality Report

Orbit 20210511_T04_006T01_9000004370_level2

Creation date: 2021-05-17T10:59:42.780895
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_006T01_9000004370cztM0_level2_bc.evt modeM0/AS1T04_006T01_9000004370cztM0_level2_quad_clean.evt
Size (bytes)4,121,418,2401,300,849,920
Size3.8 GB 1.2 GB
Events in quadrant A22,411,1878,435,668
Events in quadrant B46,381,4668,525,693
Events in quadrant C20,221,3778,240,969
Events in quadrant D29,682,7188,027,365

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01530
B01520
C01530
D01530

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01986030
B02785890
C01920930
D02216620

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018380
B018380
C018380
D018400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9006618752.081807%
B9003922912.544453%
C9006518542.058513%
D9004726322.922918%

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 105539 90115 163 163 0.15% 0.18%
B 105539 90097 6 6 0.01% 0.01%
C 105539 90117 2 2 0.00% 0.00%
D 105539 90102 171 171 0.16% 0.19%

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 14 239 1472847 1336.53 5114 5049 1098.2
A 0 13 773750 699.95 5114 5049 1098.2
A 8 192 196448 174.28 5114 5049 1098.2
B 6 159 24943012 25667.81 5132 5029 971.6
B 0 229 800511 818.76 5132 5029 971.6
B 0 190 245981 248.0 5132 5029 971.6
C 3 233 1062262 908.82 4909 4905 1163.4
C 2 114 173704 145.09 4909 4905 1163.4
C 0 10 56300 44.17 4909 4905 1163.4
D 13 104 3500748 2782.16 4944 4835 1256.5
D 8 195 3430437 2726.21 4944 4835 1256.5
D 2 250 836594 661.94 4944 4835 1256.5

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