ASTROSAT CZTI

Data Quality Report

Orbit 20211127_A10_058T15_9000004786_level2

Creation date: 2025-12-30T14:10:39.966521
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_058T15_9000004786cztM0_level2.fits modeM0/AS1A10_058T15_9000004786cztM0_level2_quad_clean.evt
Size (bytes)1,120,049,280931,348,800
Size1.0 GB 888.2 MB
Events in quadrant A7,100,3805,591,518
Events in quadrant B6,589,3825,184,881
Events in quadrant C6,789,1805,243,520
Events in quadrant D5,598,9724,348,106

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02601100
B03235730
C02894920
D04714400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04370
B04370
C04370
D04380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023440
B023420
C023440
D023400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1143479210.805443%
B11433273986.470629%
C11426233882.965115%
D1141921512613.246112%

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 162858 114488 0 0 0.00% 0.00%
B 162858 114396 0 0 0.00% 0.00%
C 162858 114378 0 0 0.00% 0.00%
D 162858 114210 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 9 19 5873 9.1 1858 1755 452.4
A 0 29 5711 8.74 1858 1755 452.4
A 7 110 5610 8.52 1858 1755 452.4
B 2 9 5738 12.06 1750 1681 336.3
B 3 80 5134 10.27 1750 1681 336.3
B 2 8 4623 8.75 1750 1681 336.3
C 1 81 5867 9.24 1799 1700 451.1
C 1 80 5672 8.81 1799 1700 451.1
C 3 187 4629 6.49 1799 1700 451.1
D 7 3 4122 6.27 1606 1470 422.7
D 6 231 4102 6.23 1606 1470 422.7
D 6 67 4068 6.15 1606 1470 422.7

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