ASTROSAT CZTI

Data Quality Report

Orbit 35758

Creation date: 2022-05-10T19:52:13.418975
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/AS1A09_142T06_9000005132_35758cztM0_level2.evt modeM0/AS1A09_142T06_9000005132_35758cztM0_level2_quad_clean.evt
Size (bytes)438,713,28063,328,320
Size418.4 MB 60.4 MB
Events in quadrant A3,042,666393,947
Events in quadrant B3,735,421398,669
Events in quadrant C2,647,117396,777
Events in quadrant D3,518,912374,726

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0123462
B0144972
C0109202
D0139202

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A50411663.292997%
B504152110.335251%
C5041951.884547%
D50412955.852013%

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 6923 5042 165 165 2.38% 3.27%
B 6923 5042 441 441 6.37% 8.75%
C 6923 5042 78 78 1.13% 1.55%
D 6923 5042 316 316 4.56% 6.27%

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 15 223 281691 2471.57 560 548 113.8
A 8 192 271804 2384.65 560 548 113.8
A 15 169 158975 1392.75 560 548 113.8
B 5 172 1447943 14025.66 536 520 103.2
B 4 232 52123 500.04 536 520 103.2
B 0 190 51915 498.02 536 520 103.2
C 0 10 260839 2016.31 552 556 129.1
C 15 214 211766 1636.16 552 556 129.1
C 9 69 9390 68.43 552 556 129.1
D 1 52 729599 5567.8 541 527 130.9
D 13 249 181415 1381.41 541 527 130.9
D 10 253 106654 810.47 541 527 130.9

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