ASTROSAT CZTI

Data Quality Report

Orbit 00985

Creation date: 2024-06-27T14:05:43.444955
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/AS1P01_998T01_9000000188_00985cztM0_level2.evt modeM0/AS1P01_998T01_9000000188_00985cztM0_level2_quad_clean.evt
Size (bytes)1,036,477,44096,877,440
Size988.5 MB 92.4 MB
Events in quadrant A7,253,523643,271
Events in quadrant B7,827,956636,569
Events in quadrant C7,573,871621,749
Events in quadrant D8,330,661606,359

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0258820
B0275830
C0268270
D0290900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6101300.491723%
B6101661.081790%
C6102360.589971%
D61021021.671583%

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 7266 6102 230 230 3.17% 3.77%
B 7266 6102 350 350 4.82% 5.74%
C 7267 6103 215 215 2.96% 3.52%
D 7267 6103 662 662 9.11% 10.85%

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 10 133 27386 56.9 1877 1889 448.1
A 12 189 15239 29.79 1877 1889 448.1
A 11 79 8683 15.16 1877 1889 448.1
B 5 249 113688 245.69 1944 1948 454.8
B 8 38 80555 172.84 1944 1948 454.8
B 0 220 56262 119.43 1944 1948 454.8
C 15 241 347106 691.42 1807 1870 499.3
C 3 9 59177 114.77 1807 1870 499.3
C 3 79 36085 68.52 1807 1870 499.3
D 1 4 1184055 2191.28 1758 1819 539.5
D 12 188 353860 652.51 1758 1819 539.5
D 13 170 45008 80.05 1758 1819 539.5

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