ASTROSAT CZTI

Data Quality Report

Orbit 57521

Creation date: 2026-05-16T11:24:47.818820
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_57521cztM0_level2.fits modeM0/AS1A14_113T09_9000006574_57521cztM0_level2_quad_clean.evt
Size (bytes)596,223,360101,626,560
Size568.6 MB 96.9 MB
Events in quadrant A3,089,555727,614
Events in quadrant B3,915,458740,025
Events in quadrant C9,654,289505,267
Events in quadrant D4,881,516629,705

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142142
B0162902
C0334162
D0193752

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6815600.880411%
B68162293.359742%
C6816240135.225939%
D68165778.465376%

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 7745 6816 1 1 0.01% 0.01%
B 7746 6817 103 103 1.33% 1.51%
C 7746 6817 1769 1769 22.84% 25.95%
D 7746 6817 449 449 5.80% 6.59%

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 3 14 82028 414.0 772 754 196.3
A 13 248 11134 52.87 772 754 196.3
A 4 3 9522 44.66 772 754 196.3
B 9 251 346483 2174.94 747 721 159.0
B 5 185 263197 1651.05 747 721 159.0
B 4 206 196737 1233.0 747 721 159.0
C 15 224 6076406 33290.98 644 636 182.5
C 6 223 785831 4302.32 644 636 182.5
C 14 254 128574 701.01 644 636 182.5
D 15 142 788213 3683.5 735 701 213.8
D 8 240 580676 2712.77 735 701 213.8
D 0 19 229003 1067.86 735 701 213.8

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