ASTROSAT CZTI

Data Quality Report

Orbit 20200515_T03_206T01_9000003672_level2

Creation date: 2025-12-11T03:08:15.194294
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/AS1T03_206T01_9000003672cztM0_level2.fits modeM0/AS1T03_206T01_9000003672cztM0_level2_quad_clean.evt
Size (bytes)557,962,560357,096,960
Size532.1 MB 340.6 MB
Events in quadrant A3,505,6331,867,144
Events in quadrant B3,361,1271,869,106
Events in quadrant C3,361,1571,754,032
Events in quadrant D2,835,4121,487,104

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01110
B01110
C01100
D01100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011380
B011380
C011400
D011420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180560
B01201050
C01205490
D01854970

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A559395120.915283%
B559156751.207189%
C558298151.459815%
D5583133766.046820%

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 69171 56143 0 0 0.00% 0.00%
B 69171 56140 0 0 0.00% 0.00%
C 69171 55987 0 0 0.00% 0.00%
D 69171 55970 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 3419 11.46 912 857 223.5
A 7 110 2808 8.73 912 857 223.5
A 0 30 2659 8.06 912 857 223.5
B 2 9 2643 10.28 890 851 174.4
B 2 8 2231 7.91 890 851 174.4
B 5 128 2196 7.71 890 851 174.4
C 1 81 2563 7.64 887 830 226.8
C 1 80 2483 7.29 887 830 226.8
C 3 126 2342 6.67 887 830 226.8
D 15 46 1997 5.87 811 737 214.4
D 7 3 1993 5.86 811 737 214.4
D 4 160 1966 5.73 811 737 214.4

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