ASTROSAT CZTI

Data Quality Report

Orbit 20201116_A10_016T01_9000004016_level2

Creation date: 2025-12-17T19:18:32.791549
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/AS1A10_016T01_9000004016cztM0_level2.fits modeM0/AS1A10_016T01_9000004016cztM0_level2_quad_clean.evt
Size (bytes)1,241,424,0001,125,679,680
Size1.2 GB 1.0 GB
Events in quadrant A7,781,4506,768,386
Events in quadrant B7,349,0266,694,907
Events in quadrant C7,586,3926,416,430
Events in quadrant D6,260,6585,599,080

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01840
B01840
C01840
D01840

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025620
B025600
C025580
D025620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02639020
B02960520
C02725180
D04013530

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12569014851.181478%
B12568741403.293897%
C12568525672.042408%
D1256591427911.363293%

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 144523 125751 0 0 0.00% 0.00%
B 144523 125706 0 0 0.00% 0.00%
C 144523 125736 0 0 0.00% 0.00%
D 144523 125336 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 0 29 7529 11.39 2024 1895 494.4
A 7 110 6083 8.47 2024 1895 494.4
A 0 30 5952 8.21 2024 1895 494.4
B 2 9 5862 10.59 1941 1849 378.8
B 5 128 4901 8.06 1941 1849 378.8
B 5 232 4839 7.89 1941 1849 378.8
C 12 241 5132 6.43 2005 1871 507.5
C 3 126 5087 6.34 2005 1871 507.5
C 3 187 5066 6.3 2005 1871 507.5
D 6 231 4411 5.84 1788 1629 476.2
D 7 3 4389 5.8 1788 1629 476.2
D 10 189 4350 5.71 1788 1629 476.2

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