ASTROSAT CZTI

Data Quality Report

Orbit 56908

Creation date: 2026-04-06T10:41:51.460775
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/AS1A14_083T14_9000006564_56908cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_56908cztM0_level2_quad_clean.evt
Size (bytes)1,587,530,880237,787,200
Size1.5 GB 226.8 MB
Events in quadrant A9,142,4031,687,163
Events in quadrant B21,905,6391,227,633
Events in quadrant C11,243,2401,576,863
Events in quadrant D15,025,8791,416,674

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03800
B03800
C03800
D03800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0412633
B0782303
C0462253
D0580153

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A187252391.276368%
B18726522627.907722%
C187265492.931753%
D1872514097.524700%

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 20226 18729 151 151 0.75% 0.81%
B 20227 18729 4389 4389 21.70% 23.43%
C 20227 18730 469 469 2.32% 2.50%
D 20226 18728 1280 1280 6.33% 6.83%

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 3 14 599119 1251.32 1918 1868 477.3
A 4 249 205822 427.31 1918 1868 477.3
A 13 153 180808 374.9 1918 1868 477.3
B 5 185 11011411 31974.97 1617 1559 344.3
B 5 172 2307274 6696.29 1617 1559 344.3
B 10 16 1316168 3817.91 1617 1559 344.3
C 13 3 1783607 3545.45 1842 1826 502.6
C 1 16 1026569 2039.07 1842 1826 502.6
C 12 249 524438 1039.91 1842 1826 502.6
D 2 249 2211173 4373.46 1788 1705 505.2
D 8 240 1299652 2569.18 1788 1705 505.2
D 15 142 1091887 2157.92 1788 1705 505.2

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