ASTROSAT CZTI

Data Quality Report

Orbit 20200627_A09_016T04_9000003742_level2

Creation date: 2025-12-13T03:00:25.369149
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_016T04_9000003742cztM0_level2.fits modeM0/AS1A09_016T04_9000003742cztM0_level2_quad_clean.evt
Size (bytes)98,346,24099,406,080
Size93.8 MB 94.8 MB
Events in quadrant A589,228598,434
Events in quadrant B579,698606,651
Events in quadrant C583,356566,279
Events in quadrant D510,606523,075

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02120
B02120
C02120
D02120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0281550
B0214830
C0210920
D0253250

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A103236276.073816%
B103231811.753366%
C103232312.237722%
D103231831.772740%

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 11368 10321 0 0 0.00% 0.00%
B 11368 10321 0 0 0.00% 0.00%
C 11368 10321 0 0 0.00% 0.00%
D 11368 10320 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 14 188 604 11.54 153 144 39.9
A 0 29 570 10.69 153 144 39.9
A 14 204 556 10.34 153 144 39.9
B 2 9 487 10.23 153 145 33.4
B 3 17 397 7.54 153 145 33.4
B 2 8 392 7.39 153 145 33.4
C 12 241 425 6.86 154 144 41.0
C 9 233 410 6.49 154 144 41.0
C 12 250 398 6.2 154 144 41.0
D 6 38 372 5.92 145 132 40.6
D 3 14 369 5.84 145 132 40.6
D 4 160 362 5.67 145 132 40.6

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