ASTROSAT CZTI

Data Quality Report

Orbit 20220329_A11_037T01_9000005030_level2

Creation date: 2022-04-05T15:26:53.048477
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_037T01_9000005030cztM0_level2_bc.evt modeM0/AS1A11_037T01_9000005030cztM0_level2_quad_clean.evt
Size (bytes)921,211,200248,950,080
Size878.5 MB 237.4 MB
Events in quadrant A7,904,3411,584,888
Events in quadrant B4,582,5531,754,359
Events in quadrant C3,935,9491,740,744
Events in quadrant D10,623,5801,596,276

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0505980
B0333430
C0287420
D0514130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02540
B02540
C02540
D02540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390
B0400
C0400
D0400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12480307624.647436%
B124805824.663462%
C124801531.225962%
D124808316.658654%

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 16158 12482 72 72 0.45% 0.58%
B 16157 12479 33 33 0.20% 0.26%
C 16157 12479 17 17 0.11% 0.14%
D 16157 12479 193 193 1.19% 1.55%

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 5122017 36271.73 644 638 141.2
A 10 83 148423 1046.67 644 638 141.2
A 15 174 105430 742.18 644 638 141.2
B 5 172 943218 6821.47 700 691 138.2
B 5 236 624432 4514.28 700 691 138.2
B 4 232 100488 722.27 700 691 138.2
C 15 214 493404 3122.04 686 685 157.8
C 0 10 402456 2545.76 686 685 157.8
C 14 67 127029 800.56 686 685 157.8
D 8 195 5696123 34283.05 680 661 166.1
D 13 249 440036 2644.76 680 661 166.1
D 7 223 364789 2191.82 680 661 166.1

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