ASTROSAT CZTI

Data Quality Report

Orbit 01825

Creation date: 2024-06-27T14:12:54.834804
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/AS1G02_021T08_9000000302_01825cztM0_level2.evt modeM0/AS1G02_021T08_9000000302_01825cztM0_level2_quad_clean.evt
Size (bytes)994,564,80074,658,240
Size948.5 MB 71.2 MB
Events in quadrant A7,568,597457,608
Events in quadrant B7,757,648468,034
Events in quadrant C7,188,015458,563
Events in quadrant D7,193,220441,946

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B110
C1-1-1
D1-1-1

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0268839
B0275021
C0257551
D02583714

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6227711.140196%
B6229530.850859%
C6229340.545834%
D6227620.995664%

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 7259 6229 247 247 3.40% 3.97%
B 7259 6230 262 262 3.61% 4.21%
C 7259 6230 191 191 2.63% 3.07%
D 7259 6228 237 237 3.26% 3.81%

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 6 10 15024 27.18 1974 1986 479.7
A 10 2 6592 9.6 1974 1986 479.7
A -1 -1 -1 -1.0 1974 1986 479.7
B 0 220 22791 43.41 2025 2036 478.1
B 0 198 20886 39.43 2025 2036 478.1
B 15 85 17759 32.89 2025 2036 478.1
C 7 159 4595 5.21 1841 1904 516.9
C -1 -1 -1 -1.0 1841 1904 516.9
C -1 -1 -1 -1.0 1841 1904 516.9
D 13 105 252924 450.99 1811 1876 556.7
D 5 233 38432 65.67 1811 1876 556.7
D 13 88 34893 59.31 1811 1876 556.7

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