ASTROSAT CZTI

Data Quality Report

Orbit 20180618_A04_048T01_9000002176_level2

Creation date: 2018-06-19T16:27:29.626979
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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_9000002176cztM0_level2_bc.evt modeM0/AS1A04_048T01_9000002176cztM0_level2_quad_clean.evt
Size (bytes)2,679,932,1601,089,838,080
Size2.5 GB 1.0 GB
Events in quadrant A17,826,4727,138,291
Events in quadrant B17,237,9957,047,137
Events in quadrant C22,039,0916,865,859
Events in quadrant D18,941,5496,811,184

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01170
C01170
D01170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01613900
B01608080
C01756120
D01667150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015260
B015260
C015260
D015260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A751247811.039615%
B751248671.154092%
C751247901.051595%
D7512413091.742452%

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 86664 75117 10 10 0.01% 0.01%
B 86664 75118 7 7 0.01% 0.01%
C 86664 75118 60 60 0.07% 0.08%
D 86664 75117 326 326 0.38% 0.43%

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 8 15 793611 854.62 4114 4044 923.9
A 12 189 770440 829.54 4114 4044 923.9
A 9 143 144175 151.68 4114 4044 923.9
B 0 205 309400 392.48 4028 3917 778.3
B 0 85 276335 349.99 4028 3917 778.3
B 4 142 174654 219.36 4028 3917 778.3
C 3 233 5489432 6282.12 3900 3862 873.2
C 0 207 715033 814.44 3900 3862 873.2
C 4 254 388902 440.95 3900 3862 873.2
D 1 255 1088033 1088.65 4012 3906 995.8
D 15 0 512455 510.67 4012 3906 995.8
D 12 16 482382 480.47 4012 3906 995.8

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