ASTROSAT CZTI

Data Quality Report

Orbit 57501

Creation date: 2026-05-15T04:12:36.116433
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/AS1A14_113T09_9000006574_57501cztM0_level2.fits modeM0/AS1A14_113T09_9000006574_57501cztM0_level2_quad_clean.evt
Size (bytes)569,430,720116,919,360
Size543.1 MB 111.5 MB
Events in quadrant A4,301,235769,843
Events in quadrant B5,131,024813,876
Events in quadrant C6,412,628696,863
Events in quadrant D4,595,101687,938

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0188651
B0208211
C0249531
D0197021

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A82241902.310311%
B82252553.100304%
C82256527.927052%
D82252232.711246%

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 8299 8225 103 103 1.24% 1.25%
B 8300 8226 35 35 0.42% 0.43%
C 8300 8226 514 514 6.19% 6.25%
D 8300 8226 134 134 1.61% 1.63%

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 13 248 661130 2927.35 914 886 225.5
A 3 128 43856 190.52 914 886 225.5
A 3 245 29905 128.66 914 886 225.5
B 4 206 1137267 5798.76 900 866 196.0
B 0 245 74436 375.41 900 866 196.0
B 7 252 57710 290.06 900 866 196.0
C 15 224 2625047 11412.51 854 845 229.9
C 6 223 141613 612.19 854 845 229.9
C 8 7 84300 362.94 854 845 229.9
D 8 240 834675 3388.1 870 831 246.1
D 3 12 85642 344.61 870 831 246.1
D 5 173 82993 333.84 870 831 246.1

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