ASTROSAT CZTI

Data Quality Report

Orbit 20180422_A04_010T01_9000002046_level2

Creation date: 2025-11-21T23:16:52.620011
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_010T01_9000002046cztM0_level2.fits modeM0/AS1A04_010T01_9000002046cztM0_level2_quad_clean.evt
Size (bytes)698,938,560609,024,960
Size666.6 MB 580.8 MB
Events in quadrant A4,244,1123,532,526
Events in quadrant B4,120,7083,538,661
Events in quadrant C4,203,0623,371,493
Events in quadrant D3,539,2282,942,187

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01190
B01190
C01190
D01190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015040
B015040
C015040
D015040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01593150
B01557240
C01565760
D02153720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7376418222.470040%
B7376411741.591562%
C7376410271.392278%
D7376343335.874219%

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 85704 73751 0 0 0.00% 0.00%
B 85705 73750 0 0 0.00% 0.00%
C 85705 73747 0 0 0.00% 0.00%
D 85705 73729 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 4004 10.74 1104 1027 277.3
A 7 110 3479 8.84 1104 1027 277.3
A 9 19 3161 7.7 1104 1027 277.3
B 2 9 3504 11.48 1085 1031 215.3
B 3 17 2855 8.47 1085 1031 215.3
B 14 254 2770 8.08 1085 1031 215.3
C 12 241 2850 6.22 1111 1029 292.6
C 2 191 2825 6.14 1111 1029 292.6
C 3 126 2812 6.09 1111 1029 292.6
D 6 231 2680 6.46 1010 917 272.8
D 3 14 2533 5.92 1010 917 272.8
D 4 160 2511 5.84 1010 917 272.8

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