ASTROSAT CZTI

Data Quality Report

Orbit 20210428_A10_071T09_9000004344_level2

Creation date: 2025-12-25T02:39:18.525871
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/AS1A10_071T09_9000004344cztM0_level2.fits modeM0/AS1A10_071T09_9000004344cztM0_level2_quad_clean.evt
Size (bytes)548,928,000413,121,600
Size523.5 MB 394.0 MB
Events in quadrant A3,454,6742,362,404
Events in quadrant B3,281,8002,350,339
Events in quadrant C3,188,9802,006,398
Events in quadrant D2,931,3562,024,993

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011140
B011140
C011140
D011140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01162770
B01662060
C02037340
D01353510

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0780
B0780
C0780
D0780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5487410961.997303%
B5487415722.864745%
C54874558410.176040%
D5487414022.554944%

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 62669 54873 0 0 0.00% 0.00%
B 62669 54869 0 0 0.00% 0.00%
C 62669 54867 0 0 0.00% 0.00%
D 62669 54871 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 2966 9.6 900 845 220.9
A 7 110 2711 8.45 900 845 220.9
A 15 236 2534 7.64 900 845 220.9
B 2 9 2591 10.3 865 826 171.4
B 3 80 2182 7.91 865 826 171.4
B 5 232 2173 7.86 865 826 171.4
C 3 187 2155 6.4 844 791 213.0
C 7 111 2145 6.36 844 791 213.0
C 3 126 2137 6.32 844 791 213.0
D 15 46 2159 6.26 836 760 223.4
D 3 14 2132 6.14 836 760 223.4
D 10 189 2014 5.61 836 760 223.4

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