ASTROSAT CZTI

Data Quality Report

Orbit 20170312_A02_071T01_9000001078_level2

Creation date: 2025-11-10T02:01:23.518095
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/AS1A02_071T01_9000001078cztM0_level2.fits modeM0/AS1A02_071T01_9000001078cztM0_level2_quad_clean.evt
Size (bytes)1,297,543,6801,382,313,600
Size1.2 GB 1.3 GB
Events in quadrant A7,727,6568,370,064
Events in quadrant B7,590,1608,540,975
Events in quadrant C7,704,4268,030,804
Events in quadrant D6,615,4367,270,394

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A028680
B028680
C028680
D028680

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03147750
B03040900
C03349050
D03308900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02140
B02140
C02140
D02140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14089240712.889447%
B14089131422.230093%
C14089232032.273373%
D14089242903.044885%

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 162537 140876 0 0 0.00% 0.00%
B 162537 140888 0 0 0.00% 0.00%
C 162537 140884 0 0 0.00% 0.00%
D 162537 140880 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 7629 11.34 2007 1867 508.2
A 7 110 6417 8.95 2007 1867 508.2
A 0 30 5986 8.11 2007 1867 508.2
B 2 9 6503 11.72 1998 1898 392.8
B 3 17 5153 8.29 1998 1898 392.8
B 12 226 5088 8.12 1998 1898 392.8
C 1 80 5849 7.4 2036 1884 536.0
C 1 81 5808 7.32 2036 1884 536.0
C 12 241 5518 6.78 2036 1884 536.0
D 3 14 4913 6.38 1888 1715 501.0
D 6 231 4861 6.28 1888 1715 501.0
D 7 5 4769 6.1 1888 1715 501.0

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