ASTROSAT CZTI

Data Quality Report

Orbit 20171228_A04_160T01_9000001798_level2

Creation date: 2018-01-05T12:59:15.580674
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_160T01_9000001798cztM0_level2_bc.evt modeM0/AS1A04_160T01_9000001798cztM0_level2_quad_clean.evt
Size (bytes)3,029,624,6401,327,377,600
Size2.8 GB 1.2 GB
Events in quadrant A17,045,2669,089,539
Events in quadrant B30,742,7798,517,938
Events in quadrant C17,787,7139,035,135
Events in quadrant D21,302,8318,658,311

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01110
B01110
C01110
D01110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01612470
B02256480
C01595160
D01661950

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014560
B014560
C014560
D014560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7151516792.347759%
B71512967513.529198%
C7151414271.995413%
D7151313251.852810%

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 82905 71516 43 43 0.05% 0.06%
B 82905 71455 405 405 0.49% 0.57%
C 82905 71519 156 156 0.19% 0.22%
D 82905 71517 184 184 0.22% 0.26%

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 9 143 973832 1221.49 3669 3614 794.3
A 1 162 684440 857.15 3669 3614 794.3
A 8 15 560486 701.09 3669 3614 794.3
B 4 239 11415208 17590.85 3446 3368 648.7
B 15 204 1552672 2388.18 3446 3368 648.7
B 10 16 1367670 2103.01 3446 3368 648.7
C 15 208 3478708 4424.01 3581 3549 785.5
C 0 207 157075 195.44 3581 3549 785.5
C 4 175 74982 90.94 3581 3549 785.5
D 8 195 1575388 1890.76 3609 3497 831.4
D 1 52 1369269 1642.83 3609 3497 831.4
D 4 95 770313 922.37 3609 3497 831.4

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