ASTROSAT CZTI

Data Quality Report

Orbit 20210831_T04_046T01_9000004680_level2

Creation date: 2021-09-03T14:24:08.343654
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_046T01_9000004680cztM0_level2_bc.evt modeM0/AS1T04_046T01_9000004680cztM0_level2_quad_clean.evt
Size (bytes)6,833,888,6401,851,739,200
Size6.4 GB 1.7 GB
Events in quadrant A28,624,00512,308,852
Events in quadrant B69,414,17011,942,924
Events in quadrant C38,605,54311,839,492
Events in quadrant D61,733,24411,323,399

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02662660
B04122300
C03135420
D03700940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01990
B01990
C01990
D02000

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025760
B025780
C025760
D025760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12661712801.010923%
B12656263865.045748%
C12662156544.465294%
D12658372915.759857%

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 150662 126680 5 5 0.00% 0.00%
B 150662 126631 94 94 0.06% 0.07%
C 150662 126689 177 177 0.12% 0.14%
D 150662 126651 3682 3682 2.44% 2.91%

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 13 254 235463 146.03 7280 7177 1563.3
A 13 6 230424 142.81 7280 7177 1563.3
A 15 174 151824 92.53 7280 7177 1563.3
B 6 159 33449682 24837.87 7129 6984 1346.4
B 12 18 2721008 2015.7 7129 6984 1346.4
B 5 172 2367633 1753.25 7129 6984 1346.4
C 3 233 8046067 4960.72 6911 6924 1620.6
C 0 10 2783620 1713.42 6911 6924 1620.6
C 2 114 241507 144.75 6911 6924 1620.6
D 8 195 16320848 10270.11 7006 6825 1588.5
D 12 227 11488958 7228.31 7006 6825 1588.5
D 2 250 2876908 1806.79 7006 6825 1588.5

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