ASTROSAT CZTI

Data Quality Report

Orbit 20200816_A09_127T03_9000003820_level2

Creation date: 2021-01-09T05:00:48.664789
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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_127T03_9000003820cztM0_level2_bc.evt modeM0/AS1A09_127T03_9000003820cztM0_level2_quad_clean.evt
Size (bytes)2,490,102,720829,834,560
Size2.3 GB 791.4 MB
Events in quadrant A12,837,7145,384,480
Events in quadrant B14,181,5535,444,870
Events in quadrant C16,322,7595,160,977
Events in quadrant D27,923,2454,967,591

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012400
B012400
C012400
D012400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01259250
B01305660
C01393710
D01800510

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0870
B0870
C0870
D0870

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A608946251.026374%
B608949461.553519%
C6089416562.719480%
D6089439406.470260%

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 69644 60892 17 17 0.02% 0.03%
B 69644 60894 40 40 0.06% 0.07%
C 69644 60895 75 75 0.11% 0.12%
D 69644 60889 698 698 1.00% 1.15%

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 0 13 228428 323.22 3215 3156 697.0
A 12 189 114534 159.8 3215 3156 697.0
A 13 254 97279 135.05 3215 3156 697.0
B 0 244 437913 714.83 3251 3177 608.2
B 5 172 408648 666.71 3251 3177 608.2
B 0 189 364849 594.69 3251 3177 608.2
C 3 233 2800011 3774.38 3104 3093 741.0
C 4 254 754392 1013.86 3104 3093 741.0
C 2 16 677959 910.72 3104 3093 741.0
D 1 52 9785350 13587.1 3078 2994 720.0
D 12 233 2157495 2992.47 3078 2994 720.0
D 7 80 2000576 2774.52 3078 2994 720.0

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