ASTROSAT CZTI

Data Quality Report

Orbit 20180524_A04_048T01_9000002114_level2

Creation date: 2025-11-22T12:49:57.095871
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/AS1A04_048T01_9000002114cztM0_level2.fits modeM0/AS1A04_048T01_9000002114cztM0_level2_quad_clean.evt
Size (bytes)572,736,960529,876,800
Size546.2 MB 505.3 MB
Events in quadrant A3,517,3783,174,432
Events in quadrant B3,363,5943,136,826
Events in quadrant C3,458,2002,979,198
Events in quadrant D2,988,5602,739,695

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011960
B011960
C011960
D011960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01242370
B01345420
C01388470
D01517620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0970
B0970
C0970
D0970

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A585477831.337387%
B5854717272.949767%
C585476801.161460%
D5854719653.356278%

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 68383 58542 0 0 0.00% 0.00%
B 68383 58529 0 0 0.00% 0.00%
C 68383 58542 0 0 0.00% 0.00%
D 68383 58527 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 3399 11.15 914 856 228.1
A 7 110 2861 8.79 914 856 228.1
A 9 19 2631 7.78 914 856 228.1
B 2 9 2898 12.0 887 849 170.7
B 14 254 2275 8.35 887 849 170.7
B 2 8 2189 7.85 887 849 170.7
C 12 241 2528 7.17 914 852 233.8
C 2 191 2374 6.51 914 852 233.8
C 3 126 2349 6.4 914 852 233.8
D 3 14 2210 6.31 852 777 227.2
D 6 231 2157 6.08 852 777 227.2
D 15 46 2080 5.74 852 777 227.2

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