ASTROSAT CZTI

Data Quality Report

Orbit 20170407_C02_028T01_9000001146_level2

Creation date: 2025-11-10T13:30:47.074799
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_028T01_9000001146cztM0_level2.fits modeM0/AS1C02_028T01_9000001146cztM0_level2_quad_clean.evt
Size (bytes)244,054,080204,439,680
Size232.7 MB 195.0 MB
Events in quadrant A772,659673,824
Events in quadrant B1,683,0441,344,881
Events in quadrant C1,713,8811,239,355
Events in quadrant D1,460,6191,179,556

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0350
B0390
C0370
D0370

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05080
B05270
C05240
D05240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01535850
B0536000
C0519680
D0633860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A255361509459.108709%
B255432040.798653%
C254861150.451228%
D253659993.938498%

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 21600 18962 0 0 0.00% 0.00%
B 21600 20451 0 0 0.00% 0.00%
C 21600 20432 0 0 0.00% 0.00%
D 21600 20406 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 14 188 802 11.82 200 188 51.9
A 14 204 712 10.09 200 188 51.9
A 0 29 706 9.97 200 188 51.9
B 2 9 1223 9.41 447 426 84.7
B 12 226 1031 7.14 447 426 84.7
B 5 128 988 6.63 447 426 84.7
C 1 80 1079 5.67 456 437 113.1
C 12 241 1068 5.58 456 437 113.1
C 9 242 1013 5.09 456 437 113.1
D 6 231 971 5.74 418 389 101.3
D 3 14 939 5.43 418 389 101.3
D 1 19 931 5.35 418 389 101.3

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