ASTROSAT CZTI

Data Quality Report

Orbit 20210904_T04_051T01_9000004686_level2

Creation date: 2021-09-08T18:00:59.380319
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_051T01_9000004686cztM0_level2_bc.evt modeM0/AS1T04_051T01_9000004686cztM0_level2_quad_clean.evt
Size (bytes)16,940,185,9203,756,510,720
Size15.8 GB 3.5 GB
Events in quadrant A60,949,46024,916,552
Events in quadrant B199,217,32223,330,968
Events in quadrant C72,183,56924,193,376
Events in quadrant D162,211,11022,651,716

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04210
B04210
C04210
D04210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05704010
B010433900
C06265520
D09188280

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A055460
B055480
C055440
D055420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A27274929631.086347%
B2726573219711.808609%
C272753113734.169707%
D272681207737.618059%

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 336485 272898 1 1 0.00% 0.00%
B 336485 272812 4262 4262 1.27% 1.56%
C 336485 272885 608 608 0.18% 0.22%
D 336485 272837 5087 5087 1.51% 1.86%

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 6 592733 174.26 15522 15316 3313.5
A 13 254 514950 150.79 15522 15316 3313.5
A 15 174 154553 42.02 15522 15316 3313.5
B 6 159 71877589 25553.31 14967 14659 2812.3
B 10 245 57686864 20507.31 14967 14659 2812.3
B 5 172 4928726 1747.36 14967 14659 2812.3
C 0 10 12064741 3466.58 14860 14892 3476.0
C 4 175 709483 199.82 14860 14892 3476.0
C 3 233 573322 160.65 14860 14892 3476.0
D 8 195 58381398 17013.55 14900 14448 3430.6
D 12 79 17244837 5022.54 14900 14448 3430.6
D 12 233 10603077 3086.51 14900 14448 3430.6

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