ASTROSAT CZTI

Data Quality Report

Orbit 20180426_T02_041T01_9000002058_level2

Creation date: 2025-11-22T01:38:15.723859
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/AS1T02_041T01_9000002058cztM0_level2.fits modeM0/AS1T02_041T01_9000002058cztM0_level2_quad_clean.evt
Size (bytes)729,089,280870,134,400
Size695.3 MB 829.8 MB
Events in quadrant A4,414,3565,427,726
Events in quadrant B4,247,9065,351,554
Events in quadrant C4,442,4305,489,159
Events in quadrant D3,619,7544,733,864

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01605860
B01825500
C01726050
D02866060

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01210
B01210
C01210
D01210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015900
B015900
C015900
D015900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A780608041.029977%
B7806025073.211632%
C7806012591.612862%
D78060805310.316423%

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 90064 78045 0 0 0.00% 0.00%
B 90064 78035 0 0 0.00% 0.00%
C 90064 78034 0 0 0.00% 0.00%
D 90064 78005 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 4201 10.8 1149 1078 289.3
A 7 110 3761 9.27 1149 1078 289.3
A 9 19 3279 7.61 1149 1078 289.3
B 2 9 3885 12.68 1121 1069 222.0
B 2 8 2914 8.31 1121 1069 222.0
B 5 128 2855 8.04 1121 1069 222.0
C 1 80 3418 7.58 1174 1098 305.9
C 1 81 3387 7.48 1174 1098 305.9
C 12 241 3195 6.86 1174 1098 305.9
D 6 231 2709 6.33 1034 939 279.8
D 6 38 2659 6.15 1034 939 279.8
D 3 14 2595 5.92 1034 939 279.8

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