ASTROSAT CZTI

Data Quality Report

Orbit 02787

Creation date: 2024-06-27T14:22:23.714184
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/AS1T01_055T01_9000000408_02787cztM0_level2.evt modeM0/AS1T01_055T01_9000000408_02787cztM0_level2_quad_clean.evt
Size (bytes)544,296,96079,776,000
Size519.1 MB 76.1 MB
Events in quadrant A3,163,374494,267
Events in quadrant B4,340,927478,069
Events in quadrant C4,462,323474,045
Events in quadrant D4,034,363473,568

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145652
B0177821
C0176861
D0170341

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71171552.177884%
B71174536.365041%
C71173705.198820%
D71172373.330055%

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 7317 7117 0 0 0.00% 0.00%
B 7317 7118 249 249 3.40% 3.50%
C 7317 7117 247 247 3.38% 3.47%
D 7317 7118 119 119 1.63% 1.67%

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 0 128 19509 111.58 809 789 167.8
A 8 15 19479 111.41 809 789 167.8
A 12 194 9074 49.38 809 789 167.8
B 14 167 973879 6249.04 805 783 155.7
B 4 81 135547 865.43 805 783 155.7
B 15 85 44300 279.45 805 783 155.7
C 2 53 1082547 5909.98 775 777 183.0
C 0 64 259195 1411.8 775 777 183.0
C 14 67 65649 354.41 775 777 183.0
D 13 53 305851 1641.43 778 758 185.9
D 13 169 239288 1283.31 778 758 185.9
D 5 233 104576 558.55 778 758 185.9

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
Veto Counter