ASTROSAT CZTI

Data Quality Report

Orbit 20180831_A04_026T01_9000002342_level2

Creation date: 2025-11-24T08:16:33.716750
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_026T01_9000002342cztM0_level2.fits modeM0/AS1A04_026T01_9000002342cztM0_level2_quad_clean.evt
Size (bytes)533,943,360559,085,760
Size509.2 MB 533.2 MB
Events in quadrant A3,180,5163,271,460
Events in quadrant B3,060,5703,325,281
Events in quadrant C3,218,4063,347,463
Events in quadrant D2,814,9603,093,551

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011580
B011580
C011580
D011580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0840
B0840
C0840
D0840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01327260
B01572740
C01190180
D01184920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5677219253.390756%
B5677220903.681392%
C567729741.715634%
D567725891.037483%

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 65202 56751 0 0 0.00% 0.00%
B 65202 56768 0 0 0.00% 0.00%
C 65202 56769 0 0 0.00% 0.00%
D 65202 56771 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 3085 11.18 828 775 206.6
A 7 110 2604 8.85 828 775 206.6
A 0 30 2420 7.96 828 775 206.6
B 2 9 2492 10.81 810 774 159.0
B 2 8 2127 8.51 810 774 159.0
B 14 254 2085 8.25 810 774 159.0
C 12 241 2199 6.43 851 793 218.8
C 3 126 2196 6.41 851 793 218.8
C 2 191 2174 6.31 851 793 218.8
D 6 231 2158 6.61 803 732 215.7
D 6 38 1996 5.86 803 732 215.7
D 10 189 1993 5.85 803 732 215.7

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