ASTROSAT CZTI

Data Quality Report

Orbit 20170709_A03_033T01_9000001368_level2

Creation date: 2025-11-15T09:19:43.100889
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/AS1A03_033T01_9000001368cztM0_level2.fits modeM0/AS1A03_033T01_9000001368cztM0_level2_quad_clean.evt
Size (bytes)238,593,600214,493,760
Size227.5 MB 204.6 MB
Events in quadrant A1,470,8621,277,127
Events in quadrant B1,412,9161,254,934
Events in quadrant C1,431,8841,177,183
Events in quadrant D1,218,8641,095,951

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04980
B05020
C05020
D05000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0510
B0490
C0510
D0510

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0526200
B0516980
C0508300
D0677170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A245886792.761510%
B245715182.108176%
C245783981.619334%
D2451315856.465957%

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 29152 24858 0 0 0.00% 0.00%
B 29152 24860 0 0 0.00% 0.00%
C 29152 24858 0 0 0.00% 0.00%
D 29152 24712 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 1486 11.79 382 361 95.5
A 7 110 1224 9.04 382 361 95.5
A 9 19 1153 8.3 382 361 95.5
B 2 9 1213 11.49 373 357 74.5
B 3 17 970 8.23 373 357 74.5
B 3 80 947 7.92 373 357 74.5
C 1 81 1091 7.46 378 353 98.9
C 1 80 1058 7.13 378 353 98.9
C 12 241 969 6.23 378 353 98.9
D 6 231 900 6.29 347 317 92.6
D 3 14 883 6.11 347 317 92.6
D 10 113 851 5.76 347 317 92.6

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