ASTROSAT CZTI

Data Quality Report

Orbit 20200723_A09_142T01_9000003766_level2

Creation date: 2021-01-09T20:25:50.935292
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/AS1A09_142T01_9000003766cztM0_level2_bc.evt modeM0/AS1A09_142T01_9000003766cztM0_level2_quad_clean.evt
Size (bytes)3,422,030,4001,011,317,760
Size3.2 GB 964.5 MB
Events in quadrant A15,226,4016,951,399
Events in quadrant B15,730,1106,945,557
Events in quadrant C14,261,9526,581,995
Events in quadrant D53,732,8565,432,916

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014060
B014060
C014060
D014060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440410
B01467250
C01431240
D02880990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A687536710.975957%
B687539181.335214%
C6875310281.495207%
D687531914227.841694%

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 80383 68744 3 3 0.00% 0.00%
B 80383 68744 15 15 0.02% 0.02%
C 80383 68744 1 1 0.00% 0.00%
D 80383 68728 8902 8902 11.07% 12.95%

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 13 147689 171.67 3861 3799 838.2
A 6 16 119579 138.13 3861 3799 838.2
A 13 254 115398 133.14 3861 3799 838.2
B 5 172 415088 572.63 3841 3757 718.3
B 0 190 263378 361.43 3841 3757 718.3
B 0 229 144516 195.96 3841 3757 718.3
C 3 233 111061 125.34 3644 3640 857.1
C 2 16 64295 70.77 3644 3640 857.1
C 8 208 29057 29.66 3644 3640 857.1
D 1 3 34131011 43427.15 3207 3124 785.9
D 1 52 4213734 5357.93 3207 3124 785.9
D 7 38 1164866 1478.3 3207 3124 785.9

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