ASTROSAT CZTI

Data Quality Report

Orbit 55760

Creation date: 2026-01-18T03:45:01.579772
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_099T04_9000006540_55760cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55760cztM0_level2_quad_clean.evt
Size (bytes)1,974,841,920220,366,080
Size1.8 GB 210.2 MB
Events in quadrant A32,399,564803,091
Events in quadrant B8,541,2441,795,225
Events in quadrant C9,736,9901,602,733
Events in quadrant D21,004,1751,204,268

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01089184
B0389963
C0416133
D0753923

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03720
B03720
C03720
D03720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A183781010754.995103%
B183792801.523478%
C183793031.648621%
D18379413222.482181%

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 19823 18379 8878 8878 44.79% 48.31%
B 19824 18382 84 84 0.42% 0.46%
C 19824 18383 164 164 0.83% 0.89%
D 19823 18379 3620 3620 18.26% 19.70%

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 15 32 25795902 80629.83 1300 1266 319.9
A 3 14 590055 1840.46 1300 1266 319.9
A 8 192 336175 1046.87 1300 1266 319.9
B 5 172 547698 1337.11 1894 1816 408.3
B 7 0 329839 803.47 1894 1816 408.3
B 4 206 55724 132.04 1894 1816 408.3
C 1 16 964146 1882.45 1879 1862 511.2
C 12 252 350734 682.47 1879 1862 511.2
C 9 38 334818 651.34 1879 1862 511.2
D 11 129 12349008 26226.83 1669 1595 470.8
D 7 96 836479 1773.36 1669 1595 470.8
D 7 70 539066 1141.63 1669 1595 470.8

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