ASTROSAT CZTI

Data Quality Report

Orbit 51843

Creation date: 2025-04-29T08:29:20.455198
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/AS1C09_011T05_9000006466_51843cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51843cztM0_level2_quad_clean.evt
Size (bytes)806,814,72088,502,400
Size769.4 MB 84.4 MB
Events in quadrant A4,589,424638,012
Events in quadrant B7,295,871641,307
Events in quadrant C6,617,758544,804
Events in quadrant D10,845,210388,687

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0183582
B0263062
C0243582
D0368902

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0200
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66991772.642185%
B669990713.539334%
C6699115417.226452%
D6699261238.990894%

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 7854 6700 125 125 1.59% 1.87%
B 7854 6700 654 654 8.33% 9.76%
C 7854 6700 840 840 10.70% 12.54%
D 7853 6699 2339 2339 29.78% 34.92%

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 12 3 772145 4497.91 693 675 171.5
A 11 3 329746 1918.58 693 675 171.5
A 5 240 167475 972.5 693 675 171.5
B 10 254 1781415 12468.4 674 652 142.8
B 4 206 976914 6835.51 674 652 142.8
B 5 185 707114 4946.45 674 652 142.8
C 15 218 2239694 12801.42 630 625 174.9
C 15 219 585730 3345.22 630 625 174.9
C 15 192 514540 2938.2 630 625 174.9
D 11 129 6007833 38777.4 551 530 154.9
D 8 176 736457 4750.44 551 530 154.9
D 12 6 605227 3903.35 551 530 154.9

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