ASTROSAT CZTI

Data Quality Report

Orbit 00926

Creation date: 2024-06-27T14:04:51.252013
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/AS1P01_163T03_9000000186_00926cztM0_level2.evt modeM0/AS1P01_163T03_9000000186_00926cztM0_level2_quad_clean.evt
Size (bytes)1,040,820,48095,526,720
Size992.6 MB 91.1 MB
Events in quadrant A7,515,819629,140
Events in quadrant B8,132,517630,959
Events in quadrant C7,485,300611,295
Events in quadrant D7,976,090587,951

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0267160
B0285910
C0266740
D0281230

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6215691.110217%
B6215891.432019%
C6214631.013840%
D62142914.682974%

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 7480 6216 256 256 3.42% 4.12%
B 7480 6216 372 372 4.97% 5.98%
C 7479 6215 264 264 3.53% 4.25%
D 7479 6215 691 691 9.24% 11.12%

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 15 233 11297 19.89 1956 1975 468.8
A 11 79 6199 9.01 1956 1975 468.8
A 3 111 6188 8.99 1956 1975 468.8
B 0 230 72351 146.9 2041 2050 478.6
B 7 221 71848 145.85 2041 2050 478.6
B 5 249 71331 144.77 2041 2050 478.6
C 15 241 227639 455.13 1803 1864 496.1
C 9 144 158459 315.67 1803 1864 496.1
C 3 111 27273 51.22 1803 1864 496.1
D 12 188 1162865 2192.39 1728 1788 529.6
D 1 4 92546 171.37 1728 1788 529.6
D 10 157 57501 105.2 1728 1788 529.6

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