ASTROSAT CZTI

Data Quality Report

Orbit 50850

Creation date: 2025-02-21T12:49:51.016972
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/AS1C07_001T01_9000006450_50850cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50850cztM0_level2_quad_clean.evt
Size (bytes)1,610,225,280275,852,160
Size1.5 GB 263.1 MB
Events in quadrant A10,979,4081,836,237
Events in quadrant B12,922,4331,965,001
Events in quadrant C17,220,3491,577,632
Events in quadrant D16,908,1641,568,546

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04140
B04140
C04140
D04140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0467593
B0520563
C0652623
D0647193

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A203832671.309915%
B203838984.405632%
C20384250612.293956%
D2038416177.932692%

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 21488 20386 134 134 0.62% 0.66%
B 21488 20386 518 518 2.41% 2.54%
C 21489 20387 1628 1628 7.58% 7.99%
D 21489 20387 1348 1348 6.27% 6.61%

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 8 249 506892 943.39 2166 2105 535.1
A 4 191 339136 629.88 2166 2105 535.1
A 5 240 279223 517.9 2166 2105 535.1
B 10 44 1622027 3579.16 2129 2053 452.6
B 5 172 1357704 2995.16 2129 2053 452.6
B 8 128 318854 699.94 2129 2053 452.6
C 4 210 2422937 4394.86 2007 1987 550.9
C 15 229 1725272 3128.36 2007 1987 550.9
C 4 5 718181 1300.14 2007 1987 550.9
D 2 216 1096592 1930.59 2027 1954 567.0
D 2 249 1089884 1918.76 2027 1954 567.0
D 2 153 822252 1446.74 2027 1954 567.0

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