ASTROSAT CZTI

Data Quality Report

Orbit 20200723_A09_142T01_9000003766_level2

Creation date: 2025-12-13T20:20:40.584206
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/AS1A09_142T01_9000003766cztM0_level2.fits modeM0/AS1A09_142T01_9000003766cztM0_level2_quad_clean.evt
Size (bytes)676,618,560562,982,400
Size645.3 MB 536.9 MB
Events in quadrant A4,391,6783,535,482
Events in quadrant B4,133,0383,502,226
Events in quadrant C4,149,9383,291,101
Events in quadrant D3,092,5622,002,561

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014060
B014060
C014060
D014060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440410
B01467250
C01431240
D02880990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A687536710.975957%
B687539181.335214%
C6875310281.495207%
D687531914227.841694%

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 80383 68743 0 0 0.00% 0.00%
B 80383 68743 0 0 0.00% 0.00%
C 80383 68744 0 0 0.00% 0.00%
D 80383 67499 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 3715 9.46 1145 1082 278.4
A 7 110 3409 8.36 1145 1082 278.4
A 9 19 3394 8.3 1145 1082 278.4
B 2 9 3313 10.79 1093 1049 209.8
B 2 8 2723 7.98 1093 1049 209.8
B 5 255 2701 7.88 1093 1049 209.8
C 12 241 2875 6.73 1097 1030 274.1
C 3 126 2843 6.61 1097 1030 274.1
C 3 187 2748 6.27 1097 1030 274.1
D 6 231 2225 6.03 886 811 234.4
D 10 189 2181 5.85 886 811 234.4
D 4 160 2141 5.67 886 811 234.4

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