ASTROSAT CZTI

Data Quality Report

Orbit 35825

Creation date: 2022-05-19T14:32:22.688532
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_071T19_9000005144_35825cztM0_level2.evt modeM0/AS1A10_071T19_9000005144_35825cztM0_level2_quad_clean.evt
Size (bytes)81,109,4407,263,360
Size77.4 MB 6.9 MB
Events in quadrant A575,35839,330
Events in quadrant B547,14939,798
Events in quadrant C664,28037,096
Events in quadrant D608,06935,413

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023712
B022211
C026051
D023871

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A85891.048951%
B858101.165501%
C858586.759907%
D858151.748252%

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 858 858 2 2 0.23% 0.23%
B 857 857 0 0 0.00% 0.00%
C 857 857 48 48 5.60% 5.60%
D 857 857 8 8 0.93% 0.93%

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 10 83 53855 1925.5 131 128 27.9
A 15 169 14551 516.9 131 128 27.9
A 10 67 1389 45.19 131 128 27.9
B 5 255 27409 1041.33 126 123 26.2
B 5 172 10925 412.24 126 123 26.2
B 0 189 4295 159.22 126 123 26.2
C 0 10 133014 4573.38 119 119 29.1
C 15 214 40835 1401.18 119 119 29.1
C 0 207 23687 811.06 119 119 29.1
D 13 249 72533 2284.45 122 118 31.7
D 7 223 40947 1288.02 122 118 31.7
D 2 250 10719 334.43 122 118 31.7

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