ASTROSAT CZTI

Data Quality Report

Orbit 20220312_T04_077T01_9000004994_level2

Creation date: 2022-03-15T18:25:28.659995
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/AS1T04_077T01_9000004994cztM0_level2_bc.evt modeM0/AS1T04_077T01_9000004994cztM0_level2_quad_clean.evt
Size (bytes)1,825,554,240504,535,680
Size1.7 GB 481.2 MB
Events in quadrant A8,001,9343,250,705
Events in quadrant B12,328,7983,212,525
Events in quadrant C10,293,0413,194,402
Events in quadrant D22,016,5712,953,458

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0786900
B0976380
C0825250
D01239120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07940
B07940
C07940
D07940

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A38886390.100293%
B3888613783.543692%
C388862230.573471%
D3888615323.939721%

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 51522 38891 0 0 0.00% 0.00%
B 51522 38887 65 65 0.13% 0.17%
C 51522 38887 29 29 0.06% 0.07%
D 51522 38886 560 560 1.09% 1.44%

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 10 83 273381 615.83 1975 1936 440.8
A 13 6 70789 156.21 1975 1936 440.8
A 13 254 57701 126.52 1975 1936 440.8
B 4 171 1615030 4150.8 1967 1922 388.6
B 5 172 1589333 4084.68 1967 1922 388.6
B 0 190 818566 2101.36 1967 1922 388.6
C 15 214 1657639 3752.21 1930 1911 441.3
C 0 207 470757 1062.5 1930 1911 441.3
C 0 10 416728 940.06 1930 1911 441.3
D 8 195 6915864 15094.24 1908 1846 458.1
D 1 52 2249896 4907.8 1908 1846 458.1
D 7 223 984782 2145.88 1908 1846 458.1

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