ASTROSAT CZTI

Data Quality Report

Orbit 35959

Creation date: 2022-06-09T05:45:55.723018
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/AS1A11_080T01_9000005146_35959cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35959cztM0_level2_quad_clean.evt
Size (bytes)763,116,48048,902,400
Size727.8 MB 46.6 MB
Events in quadrant A3,224,670334,046
Events in quadrant B11,944,519152,788
Events in quadrant C3,874,373324,190
Events in quadrant D3,721,503309,515

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0126983
B0389492
C0148482
D0143492

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5114911.779429%
B5114463790.672663%
C51141292.522487%
D51141803.519750%

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 7177 5115 54 54 0.75% 1.06%
B 7176 5114 4243 4243 59.13% 82.97%
C 7177 5115 110 110 1.53% 2.15%
D 7177 5115 141 141 1.96% 2.76%

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 15 169 605133 4802.25 631 620 125.9
A 10 83 166065 1314.29 631 620 125.9
A 13 6 9298 68.93 631 620 125.9
B 5 31 3216252 48490.37 347 340 66.3
B 5 15 3182881 47987.19 347 340 66.3
B 5 14 2525042 38068.12 347 340 66.3
C 9 187 1054175 7619.4 601 607 138.3
C 15 214 215358 1553.08 601 607 138.3
C 0 10 157448 1134.27 601 607 138.3
D 2 249 338084 2327.78 602 587 145.0
D 8 195 274141 1886.75 602 587 145.0
D 7 223 251852 1733.02 602 587 145.0

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