ASTROSAT CZTI

Data Quality Report

Orbit 20170404_C02_041T01_9000001136_level2

Creation date: 2025-11-10T12:11:53.340835
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/AS1C02_041T01_9000001136cztM0_level2.fits modeM0/AS1C02_041T01_9000001136cztM0_level2_quad_clean.evt
Size (bytes)837,446,400839,793,600
Size798.7 MB 800.9 MB
Events in quadrant A5,070,6505,050,714
Events in quadrant B4,858,1985,004,468
Events in quadrant C4,930,9204,758,910
Events in quadrant D4,325,8624,443,795

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018380
B018380
C018380
D018380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01912150
B01952990
C01896510
D01993390

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9008610911.211065%
B9008513591.508575%
C900866020.668250%
D9008512951.437531%

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 102462 90073 0 0 0.00% 0.00%
B 102462 90077 0 0 0.00% 0.00%
C 102462 90083 0 0 0.00% 0.00%
D 102462 90078 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 5084 11.64 1313 1223 331.7
A 0 29 4820 10.84 1313 1223 331.7
A 14 204 4373 9.49 1313 1223 331.7
B 2 9 4174 11.63 1279 1214 254.4
B 12 226 3246 7.99 1279 1214 254.4
B 14 254 3223 7.89 1279 1214 254.4
C 1 80 3596 6.92 1302 1201 346.1
C 1 81 3555 6.8 1302 1201 346.1
C 3 158 3447 6.49 1302 1201 346.1
D 3 14 3245 6.39 1232 1121 332.5
D 6 231 3165 6.15 1232 1121 332.5
D 7 5 3138 6.07 1232 1121 332.5

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