ASTROSAT CZTI

Data Quality Report

Orbit 20180423_A04_010T02_9000002048_level2

Creation date: 2025-11-21T23:40:31.722877
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/AS1A04_010T02_9000002048cztM0_level2.fits modeM0/AS1A04_010T02_9000002048cztM0_level2_quad_clean.evt
Size (bytes)697,921,920612,365,760
Size665.6 MB 584.0 MB
Events in quadrant A4,309,4763,653,074
Events in quadrant B4,174,9383,628,271
Events in quadrant C4,267,0083,488,168
Events in quadrant D3,243,1042,639,120

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01598930
B01582960
C01555000
D02612000

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015320
B015320
C015320
D015320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01170
C01170
D01170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7487913831.846980%
B7487912941.728121%
C748797320.977577%
D748791325417.700557%

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 86909 74858 0 0 0.00% 0.00%
B 86909 74866 0 0 0.00% 0.00%
C 86909 74865 0 0 0.00% 0.00%
D 86909 73911 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 4214 11.21 1121 1045 282.6
A 7 110 3451 8.51 1121 1045 282.6
A 9 19 3233 7.74 1121 1045 282.6
B 2 9 3627 11.73 1098 1040 220.6
B 3 17 2814 8.04 1098 1040 220.6
B 5 128 2756 7.78 1098 1040 220.6
C 1 80 3238 7.48 1125 1041 293.6
C 1 81 3054 6.86 1125 1041 293.6
C 12 241 2964 6.55 1125 1041 293.6
D 3 14 2343 5.95 924 836 253.1
D 7 5 2265 5.65 924 836 253.1
D 3 31 2262 5.63 924 836 253.1

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