ASTROSAT CZTI

Data Quality Report

Orbit 20220630_A11_089T02_9000005216_level2

Creation date: 2026-01-03T14:09:37.543700
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/AS1A11_089T02_9000005216cztM0_level2.fits modeM0/AS1A11_089T02_9000005216cztM0_level2_quad_clean.evt
Size (bytes)1,244,692,8001,235,358,720
Size1.2 GB 1.2 GB
Events in quadrant A7,752,6307,674,240
Events in quadrant B7,307,4387,445,807
Events in quadrant C7,345,3627,038,411
Events in quadrant D6,364,1346,331,353

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05070
B05070
C05070
D05070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02817510
B03027970
C03105020
D03732850

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A026640
B026640
C026640
D026640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1302238560.657334%
B13022319171.472090%
C13022335922.758345%
D13022362104.768743%

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 180931 130198 0 0 0.00% 0.00%
B 180930 130208 0 0 0.00% 0.00%
C 180931 130105 0 0 0.00% 0.00%
D 180931 130129 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 7 110 6280 8.87 2025 1908 492.6
A 9 19 6244 8.8 2025 1908 492.6
A 0 29 6132 8.57 2025 1908 492.6
B 2 9 6055 11.23 1936 1851 374.4
B 3 80 5718 10.33 1936 1851 374.4
B 5 128 5058 8.56 1936 1851 374.4
C 1 81 5978 8.39 1943 1826 494.7
C 1 80 5847 8.13 1943 1826 494.7
C 3 203 5784 8.0 1943 1826 494.7
D 7 3 4823 6.58 1827 1671 478.8
D 4 160 4749 6.43 1827 1671 478.8
D 10 113 4660 6.24 1827 1671 478.8

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