ASTROSAT CZTI

Data Quality Report

Orbit 01851

Creation date: 2024-06-27T14:13:03.646443
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_021T10_9000000304_01851cztM0_level2.evt modeM0/AS1G02_021T10_9000000304_01851cztM0_level2_quad_clean.evt
Size (bytes)1,003,769,28076,674,240
Size957.3 MB 73.1 MB
Events in quadrant A7,914,916465,323
Events in quadrant B7,878,216478,113
Events in quadrant C7,371,929467,807
Events in quadrant D6,798,544453,147

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0282152
B0280762
C02656010
D0249332

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

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6561130.198141%
B656150.076208%
C6559120.182955%
D656180.121933%

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 7801 6562 351 351 4.50% 5.35%
B 7801 6562 155 155 1.99% 2.36%
C 7801 6561 137 137 1.76% 2.09%
D 7801 6562 80 80 1.03% 1.22%

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 15 236 374042 793.79 1972 1987 468.7
A 10 2 4870 6.15 1972 1987 468.7
A -1 -1 -1 -1.0 1972 1987 468.7
B 0 220 18813 34.47 2072 2082 485.4
B 8 3 9621 15.53 2072 2082 485.4
B 4 48 7083 10.3 2072 2082 485.4
C 14 223 47839 88.43 1864 1928 519.2
C 9 191 26367 47.07 1864 1928 519.2
C 14 48 23405 41.37 1864 1928 519.2
D 1 84 67479 118.94 1793 1859 551.7
D 10 255 12604 19.48 1793 1859 551.7
D 2 54 11525 17.52 1793 1859 551.7

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