ASTROSAT CZTI

Data Quality Report

Orbit 20210128_A10_123T06_9000004138_level2

Creation date: 2025-12-20T02:52:06.049095
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/AS1A10_123T06_9000004138cztM0_level2.fits modeM0/AS1A10_123T06_9000004138cztM0_level2_quad_clean.evt
Size (bytes)504,754,560404,179,200
Size481.4 MB 385.5 MB
Events in quadrant A3,175,8842,309,839
Events in quadrant B3,016,0442,318,658
Events in quadrant C3,081,0182,208,867
Events in quadrant D2,424,2681,819,438

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01137130
B01151540
C01198760
D02457550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010600
B010600
C010620
D010580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0800
B0800
C0810
D0810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A522119501.819540%
B5222816793.214751%
C5220815082.888446%
D521951406726.950857%

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 63966 52228 0 0 0.00% 0.00%
B 63966 52088 0 0 0.00% 0.00%
C 63965 52218 0 0 0.00% 0.00%
D 63965 52182 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 3055 11.2 828 780 203.2
A 7 110 2483 8.38 828 780 203.2
A 9 19 2407 8.01 828 780 203.2
B 2 9 2438 10.63 798 764 157.6
B 5 128 2043 8.12 798 764 157.6
B 2 8 2040 8.1 798 764 157.6
C 1 81 2399 8.04 813 762 203.6
C 1 80 2357 7.83 813 762 203.6
C 3 187 2150 6.82 813 762 203.6
D 3 14 1783 6.21 692 629 185.7
D 15 46 1782 6.21 692 629 185.7
D 6 67 1721 5.88 692 629 185.7

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