ASTROSAT CZTI

Data Quality Report

Orbit 20161210_A02_175T01_9000000874_level2

Creation date: 2025-11-08T05:40:30.942770
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/AS1A02_175T01_9000000874cztM0_level2.fits modeM0/AS1A02_175T01_9000000874cztM0_level2_quad_clean.evt
Size (bytes)182,355,840165,807,360
Size173.9 MB 158.1 MB
Events in quadrant A1,082,506946,083
Events in quadrant B1,057,924949,950
Events in quadrant C1,066,804899,855
Events in quadrant D908,802818,173

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04160
B04160
C04160
D04160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0427780
B0423370
C0414480
D0597340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A204291520.744040%
B204291320.646140%
C20429700.342650%
D204295742.809731%

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 23351 20430 0 0 0.00% 0.00%
B 23351 20425 0 0 0.00% 0.00%
C 23351 20430 0 0 0.00% 0.00%
D 23351 20428 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 1016 10.21 281 262 73.9
A 7 110 888 8.48 281 262 73.9
A 9 19 851 7.98 281 262 73.9
B 2 9 962 11.7 278 263 59.8
B 2 8 759 8.3 278 263 59.8
B 14 254 747 8.1 278 263 59.8
C 1 81 790 6.88 281 260 77.0
C 9 242 771 6.64 281 260 77.0
C 9 188 767 6.59 281 260 77.0
D 3 14 725 6.76 258 234 72.7
D 1 19 701 6.43 258 234 72.7
D 6 231 660 5.86 258 234 72.7

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