ASTROSAT CZTI

Data Quality Report

Orbit 35825

Creation date: 2022-05-19T14:20:31.647830
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_146T01_9000005142_35825cztM0_level2.evt modeM0/AS1A09_146T01_9000005142_35825cztM0_level2_quad_clean.evt
Size (bytes)349,793,28066,683,520
Size333.6 MB 63.6 MB
Events in quadrant A2,168,051450,661
Events in quadrant B2,377,827450,197
Events in quadrant C2,151,699437,117
Events in quadrant D3,627,893403,170

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0820
B0820
C0820
D0820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A087621
B095581
C084871
D0133351

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3935120.304956%
B3935421.067344%
C3935541.372300%
D39353057.750953%

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 5757 3934 3 3 0.05% 0.08%
B 5757 3934 25 25 0.43% 0.64%
C 5757 3935 40 40 0.69% 1.02%
D 5757 3935 341 341 5.92% 8.67%

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 15 169 124480 1233.24 499 491 100.5
A 10 83 97763 967.51 499 491 100.5
A 8 144 11931 113.79 499 491 100.5
B 4 232 116713 1272.38 489 478 91.4
B 5 255 94911 1033.72 489 478 91.4
B 0 213 93775 1021.29 489 478 91.4
C 15 214 165199 1499.08 476 479 109.9
C 0 10 128992 1169.57 476 479 109.9
C 13 61 3216 24.91 476 479 109.9
D 7 223 674787 5883.61 472 460 114.6
D 2 250 613282 5346.97 472 460 114.6
D 13 249 254319 2214.96 472 460 114.6

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