ASTROSAT CZTI

Data Quality Report

Orbit 20180425_A04_167T05_9000002052_level2

Creation date: 2025-11-22T00:29:01.712755
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_167T05_9000002052cztM0_level2.fits modeM0/AS1A04_167T05_9000002052cztM0_level2_quad_clean.evt
Size (bytes)60,814,08057,594,240
Size58.0 MB 54.9 MB
Events in quadrant A362,594333,722
Events in quadrant B351,924333,154
Events in quadrant C359,834321,521
Events in quadrant D307,548294,911

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0137440
B0138030
C0134780
D0169700

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66031161.756777%
B66031171.771922%
C6603881.332728%
D66031472.226261%

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 7262 6601 0 0 0.00% 0.00%
B 7262 6601 0 0 0.00% 0.00%
C 7262 6601 0 0 0.00% 0.00%
D 7262 6601 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 14 188 376 11.13 94 88 25.9
A 0 29 331 9.39 94 88 25.9
A 14 204 309 8.54 94 88 25.9
B 2 9 311 10.05 92 87 22.3
B 5 232 257 7.62 92 87 22.3
B 5 225 254 7.49 92 87 22.3
C 12 241 281 7.19 94 88 26.9
C 7 111 258 6.33 94 88 26.9
C 3 126 245 5.85 94 88 26.9
D 4 246 257 6.9 87 79 25.8
D 6 231 230 5.85 87 79 25.8
D 15 142 228 5.77 87 79 25.8

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