ASTROSAT CZTI

Data Quality Report

Orbit 20180306_T02_012T04_9000001952_level2

Creation date: 2025-11-19T23:08:59.845529
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_012T04_9000001952cztM0_level2.fits modeM0/AS1T02_012T04_9000001952cztM0_level2_quad_clean.evt
Size (bytes)39,404,16025,148,160
Size37.6 MB 24.0 MB
Events in quadrant A247,446125,714
Events in quadrant B184,64097,743
Events in quadrant C246,820119,535
Events in quadrant D201,382105,163

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A091010
B0189250
C089810
D0136370

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0920
B0920
C0920
D0920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4435190.428410%
B4435155034.949267%
C443590.202931%
D443544510.033822%

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 5505 4435 0 0 0.00% 0.00%
B 5505 4206 0 0 0.00% 0.00%
C 5505 4435 0 0 0.00% 0.00%
D 5505 4430 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 29 235 9.7 64 61 17.9
A 7 110 210 8.31 64 61 17.9
A 9 239 186 6.97 64 61 17.9
B 2 9 169 10.09 48 46 12.2
B 2 8 131 6.97 48 46 12.2
B 5 232 124 6.4 48 46 12.2
C 1 80 203 7.7 64 60 18.6
C 15 65 199 7.49 64 60 18.6
C 1 81 193 7.16 64 60 18.6
D 4 246 169 6.79 57 52 17.2
D 4 160 161 6.33 57 52 17.2
D 6 231 153 5.86 57 52 17.2

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