ASTROSAT CZTI

Data Quality Report

Orbit 20170125_A02_073T02_9000000982_level2

Creation date: 2025-11-09T06:39:04.626093
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/AS1A02_073T02_9000000982cztM0_level2.fits modeM0/AS1A02_073T02_9000000982cztM0_level2_quad_clean.evt
Size (bytes)450,506,880410,088,960
Size429.6 MB 391.1 MB
Events in quadrant A2,712,6882,371,562
Events in quadrant B2,632,5842,387,020
Events in quadrant C2,699,0062,286,166
Events in quadrant D2,281,8862,057,376

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0850
B0840
C0840
D0840

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09840
B09860
C09840
D09840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0999740
B01037270
C01003070
D01253040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A483387321.514337%
B483347821.617909%
C483304941.022139%
D4833417113.539951%

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 68178 48386 0 0 0.00% 0.00%
B 68178 48371 0 0 0.00% 0.00%
C 68178 48373 0 0 0.00% 0.00%
D 68177 48359 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 2641 10.8 705 655 184.0
A 7 110 2290 8.89 705 655 184.0
A 0 30 2032 7.49 705 655 184.0
B 2 9 2343 11.94 694 658 141.1
B 5 128 1844 8.4 694 658 141.1
B 5 225 1779 7.94 694 658 141.1
C 1 80 2015 7.12 712 657 190.8
C 1 81 1987 6.97 712 657 190.8
C 12 241 1839 6.2 712 657 190.8
D 6 231 1672 6.19 652 591 174.7
D 4 160 1609 5.83 652 591 174.7
D 7 3 1582 5.67 652 591 174.7

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