ASTROSAT CZTI

Data Quality Report

Orbit 20180804_T02_076T01_9000002274_level2

Creation date: 2018-08-06T10:25:05.171053
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/AS1T02_076T01_9000002274cztM0_level2_bc.evt modeM0/AS1T02_076T01_9000002274cztM0_level2_quad_clean.evt
Size (bytes)3,131,723,5201,019,741,760
Size2.9 GB 972.5 MB
Events in quadrant A17,889,0766,611,875
Events in quadrant B17,593,6416,675,572
Events in quadrant C21,612,2296,549,519
Events in quadrant D32,935,4866,198,311

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014420
B014420
C014420
D014420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01610380
B01558990
C01683790
D02110530

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7076417642.492793%
B7076510751.519113%
C7076515732.222850%
D7076533784.773546%

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 82237 70765 42 42 0.05% 0.06%
B 82237 70764 64 64 0.08% 0.09%
C 82237 70764 89 89 0.11% 0.13%
D 82237 70763 655 655 0.80% 0.93%

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 14 238 2283401 2830.15 3702 3635 805.5
A 14 237 750552 927.24 3702 3635 805.5
A 9 143 229885 280.87 3702 3635 805.5
B 10 245 1176354 1667.6 3734 3643 703.2
B 3 209 264367 370.75 3734 3643 703.2
B 0 189 239891 335.95 3734 3643 703.2
C 3 233 6817930 8634.08 3588 3557 789.2
C 7 247 442222 555.81 3588 3557 789.2
C 3 9 172616 214.2 3588 3557 789.2
D 13 122 10485652 12537.25 3593 3468 836.1
D 1 20 2728994 3259.88 3593 3468 836.1
D 5 222 2311514 2760.55 3593 3468 836.1

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