ASTROSAT CZTI

Data Quality Report

Orbit 27881

Creation date: 2024-06-27T19:45:33.018019
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/AS1A10_024T01_9000004026_27881cztM0_level2.evt modeM0/AS1A10_024T01_9000004026_27881cztM0_level2_quad_clean.evt
Size (bytes)541,952,64094,417,920
Size516.8 MB 90.0 MB
Events in quadrant A3,222,573630,933
Events in quadrant B3,703,231625,162
Events in quadrant C3,265,904597,589
Events in quadrant D5,787,537559,171

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0137510
B0151480
C0136910
D0213970

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6401640.999844%
B64021722.686660%
C6402931.452671%
D640296915.135895%

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 7271 6402 20 20 0.28% 0.31%
B 7272 6403 64 64 0.88% 1.00%
C 7272 6402 1 1 0.01% 0.02%
D 7272 6403 940 940 12.93% 14.68%

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 15 174 82184 513.52 788 775 158.5
A 0 13 80303 501.66 788 775 158.5
A 13 254 12266 72.48 788 775 158.5
B 5 172 173374 1169.13 780 762 147.6
B 0 190 117506 790.73 780 762 147.6
B 0 230 91545 614.89 780 762 147.6
C 3 233 188893 1091.4 741 747 172.4
C 14 238 121229 698.9 741 747 172.4
C 15 208 55924 320.07 741 747 172.4
D 1 52 2826686 16724.13 700 680 169.0
D 7 69 82581 484.69 700 680 169.0
D 2 250 74713 438.12 700 680 169.0

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