ASTROSAT CZTI

Data Quality Report

Orbit 20161208_A02_046T01_9000000864_level2

Creation date: 2025-11-08T04:29:20.729870
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_046T01_9000000864cztM0_level2.fits modeM0/AS1A02_046T01_9000000864cztM0_level2_quad_clean.evt
Size (bytes)476,015,040524,600,640
Size454.0 MB 500.3 MB
Events in quadrant A2,859,0363,220,948
Events in quadrant B2,763,0383,211,776
Events in quadrant C2,797,7003,046,325
Events in quadrant D2,424,8102,837,280

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01083180
B01106330
C01065780
D01124700

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010620
B010620
C010620
D010620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01010
B01010
C01010
D01010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A520534580.879872%
B520535341.025877%
C520532190.420725%
D520534070.781895%

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 62178 52052 0 0 0.00% 0.00%
B 62178 52045 0 0 0.00% 0.00%
C 62178 52053 0 0 0.00% 0.00%
D 62178 52041 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 14 188 2837 11.4 743 697 187.7
A 0 29 2728 10.82 743 697 187.7
A 7 110 2494 9.57 743 697 187.7
B 2 9 2423 11.93 729 698 144.6
B 14 254 1880 8.17 729 698 144.6
B 3 17 1865 8.07 729 698 144.6
C 1 81 2122 7.25 739 686 198.0
C 1 80 2110 7.19 739 686 198.0
C 12 241 1987 6.57 739 686 198.0
D 6 231 1826 6.41 691 629 186.5
D 11 82 1816 6.36 691 629 186.5
D 3 14 1810 6.33 691 629 186.5

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