ASTROSAT CZTI

Data Quality Report

Orbit 20181111_A05_004T06_9000002506_level2

Creation date: 2025-11-25T19:39:56.791361
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/AS1A05_004T06_9000002506cztM0_level2.fits modeM0/AS1A05_004T06_9000002506cztM0_level2_quad_clean.evt
Size (bytes)597,522,240569,983,680
Size569.8 MB 543.6 MB
Events in quadrant A3,628,2843,315,110
Events in quadrant B3,632,0403,655,725
Events in quadrant C3,692,7783,503,759
Events in quadrant D2,733,4722,387,266

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0910
B0910
C0910
D0910

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013080
B013080
C013080
D013080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01846130
B01428240
C01322500
D02844310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6412063549.909545%
B6412111161.740459%
C641217841.222688%
D641201728626.958827%

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 78424 64106 0 0 0.00% 0.00%
B 78424 64066 0 0 0.00% 0.00%
C 78424 64121 0 0 0.00% 0.00%
D 78424 63558 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 3406 10.83 944 885 232.8
A 7 110 2888 8.6 944 885 232.8
A 0 30 2761 8.06 944 885 232.8
B 2 9 2944 10.83 960 917 187.2
B 2 8 2451 8.2 960 917 187.2
B 5 225 2412 7.99 960 917 187.2
C 1 80 2759 7.39 975 908 250.4
C 1 81 2720 7.23 975 908 250.4
C 12 241 2591 6.72 975 908 250.4
D 6 67 1999 6.31 778 710 204.2
D 6 231 1991 6.27 778 710 204.2
D 3 14 1988 6.26 778 710 204.2

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