ASTROSAT CZTI

Data Quality Report

Orbit 50556

Creation date: 2025-02-01T16:40:46.926335
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/AS1T05_239T01_9000006444_50556cztM0_level2.fits modeM0/AS1T05_239T01_9000006444_50556cztM0_level2_quad_clean.evt
Size (bytes)894,870,72094,809,600
Size853.4 MB 90.4 MB
Events in quadrant A6,302,205653,758
Events in quadrant B4,247,243748,828
Events in quadrant C11,240,470416,666
Events in quadrant D10,754,884528,265

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0237220
B0178680
C0386340
D0372660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A75145517.332978%
B75141141.517168%
C7514308040.990152%
D7514154220.521693%

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 7514 7514 437 437 5.82% 5.82%
B 7514 7514 83 83 1.10% 1.10%
C 7514 7514 2456 2456 32.69% 32.69%
D 7513 7513 1662 1662 22.12% 22.12%

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 12 250 1586434 8352.12 766 745 189.9
A 3 130 264913 1391.42 766 745 189.9
A 3 14 263295 1382.9 766 745 189.9
B 3 249 402288 2422.01 774 749 165.8
B 8 128 118211 708.51 774 749 165.8
B 5 185 92726 554.79 774 749 165.8
C 15 196 3673652 22159.62 592 591 165.8
C 15 214 2508085 15127.74 592 591 165.8
C 0 208 853995 5148.6 592 591 165.8
D 7 61 4002133 20446.66 705 680 195.7
D 6 42 911029 4651.71 705 680 195.7
D 7 126 658095 3359.26 705 680 195.7

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