ASTROSAT CZTI

Data Quality Report

Orbit 20180225_G08_045T01_9000001920_level2

Creation date: 2025-11-19T18:16:53.946494
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/AS1G08_045T01_9000001920cztM0_level2.fits modeM0/AS1G08_045T01_9000001920cztM0_level2_quad_clean.evt
Size (bytes)611,781,120598,826,880
Size583.4 MB 571.1 MB
Events in quadrant A3,798,0683,651,651
Events in quadrant B3,068,7343,187,221
Events in quadrant C3,826,8583,533,443
Events in quadrant D3,247,7583,184,420

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013560
B013560
C013560
D013560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01477530
B02355880
C01367740
D01725590

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01130
B01130
C01130
D01130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A667749771.463144%
B667641536823.018393%
C667664670.699458%
D6677626804.013418%

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 77978 66798 0 0 0.00% 0.00%
B 77978 63473 0 0 0.00% 0.00%
C 77978 66800 0 0 0.00% 0.00%
D 77978 66616 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 3780 11.53 990 924 247.6
A 7 110 3102 8.8 990 924 247.6
A 9 19 2888 7.93 990 924 247.6
B 2 9 2695 11.94 808 767 161.4
B 3 17 2011 7.71 808 767 161.4
B 2 8 2006 7.68 808 767 161.4
C 12 241 2774 6.99 1011 942 262.3
C 3 126 2625 6.42 1011 942 262.3
C 2 191 2554 6.15 1011 942 262.3
D 6 231 2462 6.57 926 845 245.9
D 10 189 2354 6.14 926 845 245.9
D 3 14 2333 6.05 926 845 245.9

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