ASTROSAT CZTI

Data Quality Report

Orbit 20171028_A04_044T01_9000001648_level2

Creation date: 2025-11-18T01:29:40.432921
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/AS1A04_044T01_9000001648cztM0_level2.fits modeM0/AS1A04_044T01_9000001648cztM0_level2_quad_clean.evt
Size (bytes)617,123,520617,209,920
Size588.5 MB 588.6 MB
Events in quadrant A3,673,3643,674,755
Events in quadrant B3,608,9083,862,788
Events in quadrant C3,785,7943,618,568
Events in quadrant D2,987,8442,909,674

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013740
B013740
C013740
D013740

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01090
B01090
C01090
D01090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01984470
B01864020
C01382710
D02374570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6744850357.465010%
B6744851317.607342%
C674484440.658285%
D67448885313.125667%

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 78368 67382 0 0 0.00% 0.00%
B 78368 67443 0 0 0.00% 0.00%
C 78368 67448 0 0 0.00% 0.00%
D 78368 66895 0 0 0.00% 0.00%

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 29 3488 10.61 957 892 244.7
A 7 110 3085 8.96 957 892 244.7
A 9 19 2703 7.4 957 892 244.7
B 2 9 3149 11.87 950 902 189.3
B 14 254 2404 7.93 950 902 189.3
B 5 225 2349 7.64 950 902 189.3
C 1 80 2800 7.13 999 926 262.8
C 1 81 2742 6.91 999 926 262.8
C 12 241 2623 6.46 999 926 262.8
D 3 14 2194 6.2 852 773 229.1
D 6 231 2170 6.1 852 773 229.1
D 7 5 2141 5.97 852 773 229.1

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