ASTROSAT CZTI

Data Quality Report

Orbit 31236

Creation date: 2024-06-27T20:25:24.951747
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/AS1C06_002T02_9000004518_31236cztM0_level2.evt modeM0/AS1C06_002T02_9000004518_31236cztM0_level2_quad_clean.evt
Size (bytes)659,566,080114,773,760
Size629.0 MB 109.5 MB
Events in quadrant A3,325,723808,581
Events in quadrant B6,501,669757,810
Events in quadrant C3,530,136752,919
Events in quadrant D6,207,163731,826

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0136941
B0233561
C0141611
D0231051

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6089871.428806%
B608981513.384792%
C60891983.251765%
D60893004.926917%

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 7339 6090 2 2 0.03% 0.03%
B 7339 6090 450 450 6.13% 7.39%
C 7339 6090 38 38 0.52% 0.62%
D 7339 6090 206 206 2.81% 3.38%

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 12 96 64042 381.25 845 830 165.8
A 13 254 11410 63.81 845 830 165.8
A 0 226 7542 40.48 845 830 165.8
B 6 159 1611470 11151.42 784 768 144.4
B 14 167 1493187 10332.51 784 768 144.4
B 10 245 78400 537.47 784 768 144.4
C 0 10 216063 1200.34 780 785 179.3
C 14 238 130176 721.45 780 785 179.3
C 3 233 58459 321.58 780 785 179.3
D 8 195 2714466 13001.1 795 784 208.7
D 7 64 179299 855.26 795 784 208.7
D 10 253 176320 840.98 795 784 208.7

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