ASTROSAT CZTI

Data Quality Report

Orbit 20170118_A02_090T01_9000000970_level2

Creation date: 2025-11-09T04:56:47.487670
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/AS1A02_090T01_9000000970cztM0_level2.fits modeM0/AS1A02_090T01_9000000970cztM0_level2_quad_clean.evt
Size (bytes)1,963,356,4801,986,318,720
Size1.8 GB 1.8 GB
Events in quadrant A11,858,48811,983,444
Events in quadrant B11,534,28011,989,097
Events in quadrant C11,679,49611,477,010
Events in quadrant D9,981,19610,306,110

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04362310
B04545860
C04365560
D04909640

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03170
B03170
C03170
D03170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A042860
B042860
C042860
D042860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A21029232361.538813%
B21029238771.843627%
C21029221081.002416%
D21029250312.392388%

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 242028 210264 0 0 0.00% 0.00%
B 242028 210259 0 0 0.00% 0.00%
C 242028 210268 0 0 0.00% 0.00%
D 242028 210217 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 12404 12.27 3076 2870 776.8
A 0 29 11708 11.38 3076 2870 776.8
A 14 204 10475 9.79 3076 2870 776.8
B 2 9 9884 11.51 3038 2884 608.3
B 12 226 7928 8.29 3038 2884 608.3
B 14 254 7916 8.27 3038 2884 608.3
C 1 81 9282 7.83 3083 2854 820.9
C 1 80 9083 7.59 3083 2854 820.9
C 12 241 8304 6.64 3083 2854 820.9
D 6 231 7253 6.1 2846 2571 767.9
D 11 82 7250 6.09 2846 2571 767.9
D 15 47 7181 6.0 2846 2571 767.9

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