ASTROSAT CZTI

Data Quality Report

Orbit 20211118_T04_066T01_9000004772_level2

Creation date: 2025-12-29T22:45:14.844480
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/AS1T04_066T01_9000004772cztM0_level2.fits modeM0/AS1T04_066T01_9000004772cztM0_level2_quad_clean.evt
Size (bytes)396,095,040297,959,040
Size377.7 MB 284.2 MB
Events in quadrant A2,552,3481,738,733
Events in quadrant B2,329,8041,619,169
Events in quadrant C2,415,2441,633,289
Events in quadrant D1,971,7301,305,259

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0828540
B01149120
C0849670
D01885520

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08140
B08140
C08140
D08140

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01530
B01530
C01530
D01530

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A39670580.146206%
B3967020045.051676%
C396703250.819259%
D39670497712.546005%

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 55084 39670 0 0 0.00% 0.00%
B 55084 39656 0 0 0.00% 0.00%
C 55084 39664 0 0 0.00% 0.00%
D 55084 39654 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 2097 8.99 667 632 162.9
A 9 19 2084 8.91 667 632 162.9
A 7 110 1981 8.28 667 632 162.9
B 2 9 1943 11.21 619 595 120.2
B 3 80 1750 9.61 619 595 120.2
B 5 128 1650 8.77 619 595 120.2
C 1 81 2013 8.78 639 604 160.5
C 1 80 1969 8.51 639 604 160.5
C 3 187 1708 6.88 639 604 160.5
D 10 189 1504 6.72 565 519 146.5
D 6 231 1429 6.21 565 519 146.5
D 10 113 1422 6.16 565 519 146.5

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