ASTROSAT CZTI

Data Quality Report

Orbit 35357

Creation date: 2022-04-22T17:49:03.405036
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/AS1A11_099T01_9000005068_35357cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35357cztM0_level2_quad_clean.evt
Size (bytes)908,184,96078,085,440
Size866.1 MB 74.5 MB
Events in quadrant A5,853,444418,711
Events in quadrant B9,760,896421,500
Events in quadrant C5,007,040498,707
Events in quadrant D6,347,940472,567

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0225003
B0344752
C0197632
D0241652

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7930102312.900378%
B7930225128.385876%
C79302733.442623%
D79303854.854981%

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 10797 7932 867 867 8.03% 10.93%
B 10797 7932 1816 1816 16.82% 22.89%
C 10797 7932 234 234 2.17% 2.95%
D 10797 7932 368 368 3.41% 4.64%

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 15 169 2324073 13339.32 860 841 174.2
A 10 83 104002 592.32 860 841 174.2
A 9 143 78808 447.66 860 841 174.2
B 4 251 5813044 36688.77 824 802 158.4
B 5 172 402751 2537.23 824 802 158.4
B 5 236 184883 1161.98 824 802 158.4
C 15 208 546454 2587.26 903 908 210.9
C 0 10 479869 2271.48 903 908 210.9
C 15 214 320830 1517.23 903 908 210.9
D 7 80 1259039 5668.91 899 873 221.9
D 8 195 744112 3348.81 899 873 221.9
D 10 118 222751 999.71 899 873 221.9

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