ASTROSAT CZTI

Data Quality Report

Orbit 35812

Creation date: 2022-05-19T12:45:44.096169
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/AS1A09_146T01_9000005142_35812cztM0_level2.evt modeM0/AS1A09_146T01_9000005142_35812cztM0_level2_quad_clean.evt
Size (bytes)445,478,400107,496,000
Size424.8 MB 102.5 MB
Events in quadrant A2,877,760748,097
Events in quadrant B3,230,890738,805
Events in quadrant C3,216,686711,908
Events in quadrant D3,810,809690,207

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0117593
B0128942
C0125822
D0148022

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5239110.209964%
B52391112.118725%
C52391172.233251%
D52391232.347776%

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 7332 5240 3 3 0.04% 0.06%
B 7332 5240 83 83 1.13% 1.58%
C 7332 5240 107 107 1.46% 2.04%
D 7332 5240 134 134 1.83% 2.56%

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 157687 1158.53 682 672 135.5
A 15 169 70729 516.91 682 672 135.5
A 13 6 15375 108.49 682 672 135.5
B 5 172 372399 3007.62 661 648 123.6
B 5 255 73698 591.0 661 648 123.6
B 4 232 72504 581.34 661 648 123.6
C 0 10 315764 2104.68 649 654 149.7
C 15 214 216843 1443.97 649 654 149.7
C 10 49 69599 460.5 649 654 149.7
D 7 223 380751 2377.43 660 646 159.9
D 2 249 200124 1247.67 660 646 159.9
D 10 118 178974 1115.38 660 646 159.9

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