ASTROSAT CZTI

Data Quality Report

Orbit 20180908_A04_104T03_9000002348_level2

Creation date: 2025-11-24T13:55:48.183776
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/AS1A04_104T03_9000002348cztM0_level2.fits modeM0/AS1A04_104T03_9000002348cztM0_level2_quad_clean.evt
Size (bytes)614,966,400500,855,040
Size586.5 MB 477.7 MB
Events in quadrant A3,792,8322,825,512
Events in quadrant B3,626,5422,828,248
Events in quadrant C3,666,4902,698,361
Events in quadrant D3,230,2082,506,488

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012760
B012760
C012760
D012760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01090
B01090
C01090
D01090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01341860
B01388980
C01326940
D01329530

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A628338861.410087%
B6283310861.728391%
C628339641.534226%
D628336250.994700%

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 72872 62819 0 0 0.00% 0.00%
B 72873 62827 0 0 0.00% 0.00%
C 72872 62829 0 0 0.00% 0.00%
D 72872 62826 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 3588 11.08 985 921 240.7
A 7 110 2983 8.57 985 921 240.7
A 15 236 2870 8.1 985 921 240.7
B 2 9 2870 10.37 958 916 188.4
B 3 80 2566 8.76 958 916 188.4
B 5 128 2470 8.25 958 916 188.4
C 12 241 2568 6.64 968 901 251.1
C 2 191 2527 6.47 968 901 251.1
C 3 158 2488 6.32 968 901 251.1
D 3 14 2440 6.52 921 835 246.2
D 6 231 2371 6.24 921 835 246.2
D 7 3 2258 5.78 921 835 246.2

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