ASTROSAT CZTI

Data Quality Report

Orbit 20181028_A05_101T09_9000002466_level2

Creation date: 2025-11-25T12:03:32.963879
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/AS1A05_101T09_9000002466cztM0_level2.fits modeM0/AS1A05_101T09_9000002466cztM0_level2_quad_clean.evt
Size (bytes)179,323,200256,366,080
Size171.0 MB 244.5 MB
Events in quadrant A1,067,2761,632,904
Events in quadrant B1,052,3881,725,268
Events in quadrant C1,067,1881,638,577
Events in quadrant D894,7181,419,329

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03960
B03960
C03960
D03960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0508110
B0428520
C0400190
D0696220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1957811956.103790%
B195783081.573194%
C195782201.123710%
D1957815607.968127%

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 20993 19572 0 0 0.00% 0.00%
B 20993 19578 0 0 0.00% 0.00%
C 20993 19578 0 0 0.00% 0.00%
D 20993 19575 0 0 0.00% 0.00%

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 0 29 1033 10.91 277 262 70.7
A 7 110 895 8.96 277 262 70.7
A 0 30 801 7.63 277 262 70.7
B 2 9 834 9.8 278 266 57.9
B 2 8 725 7.92 278 266 57.9
B 14 254 707 7.61 278 266 57.9
C 1 80 789 7.18 281 262 73.4
C 12 241 784 7.11 281 262 73.4
C 1 81 767 6.88 281 262 73.4
D 3 14 666 6.22 255 232 69.8
D 10 189 646 5.93 255 232 69.8
D 6 231 646 5.93 255 232 69.8

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