ASTROSAT CZTI

Data Quality Report

Orbit 33771

Creation date: 2024-06-27T20:52:29.133100
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/AS1A11_086T01_9000004820_33771cztM0_level2.evt modeM0/AS1A11_086T01_9000004820_33771cztM0_level2_quad_clean.evt
Size (bytes)750,934,08071,366,400
Size716.1 MB 68.1 MB
Events in quadrant A9,728,295377,503
Events in quadrant B4,194,483486,887
Events in quadrant C3,725,179486,080
Events in quadrant D4,759,013460,840

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0323403
B0156272
C0146422
D0177642

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4976282256.712219%
B497668413.745981%
C49761883.778135%
D49761883.778135%

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 7129 4977 2665 2665 37.38% 53.55%
B 7129 4977 555 555 7.79% 11.15%
C 7129 4977 177 177 2.48% 3.56%
D 7129 4977 171 171 2.40% 3.44%

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 5241453 48361.7 551 542 108.4
A 15 237 2340012 21587.99 551 542 108.4
A 13 6 9078 78.77 551 542 108.4
B 5 172 1453852 12630.6 619 607 115.1
B 5 200 90957 785.26 619 607 115.1
B 0 229 45131 386.97 619 607 115.1
C 0 239 408193 2773.29 647 657 147.0
C 9 187 274574 1864.01 647 657 147.0
C 15 214 216110 1466.16 647 657 147.0
D 8 195 1085250 6326.09 641 632 171.5
D 7 223 401449 2337.79 641 632 171.5
D 1 47 177977 1034.37 641 632 171.5

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