ASTROSAT CZTI

Data Quality Report

Orbit 21879

Creation date: 2024-06-27T18:33:23.478412
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/AS1A07_041T01_9000003234_21879cztM0_level2.evt modeM0/AS1A07_041T01_9000003234_21879cztM0_level2_quad_clean.evt
Size (bytes)271,247,04053,913,600
Size258.7 MB 51.4 MB
Events in quadrant A1,881,564333,116
Events in quadrant B1,998,189332,139
Events in quadrant C1,901,648350,055
Events in quadrant D2,144,214320,267

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0221143
B0216138
C0220135
D0221118

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A085
B076
C099
D0109

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02300314565
B02309614493
C02228613856
D02426415087

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A419040.095465%
B4197130.309745%
C4205200.475624%
D4155581.395909%

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 10203 5355 0 0 0.00% 0.00%
B 10222 5374 5 5 0.05% 0.09%
C 13841 5436 0 0 0.00% 0.00%
D 10229 5363 50 50 0.49% 0.93%

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 5 16 16272 160.22 482 471 98.6
A 13 254 8031 76.66 482 471 98.6
A 0 226 4133 37.13 482 471 98.6
B 3 64 30675 320.56 482 469 94.2
B 0 230 25534 266.0 482 469 94.2
B 0 190 18062 186.7 482 469 94.2
C 14 238 74183 665.77 467 468 110.7
C 10 91 5070 41.56 467 468 110.7
C 13 61 3245 25.08 467 468 110.7
D 2 136 188071 1688.71 460 447 111.1
D 7 238 95748 857.76 460 447 111.1
D 1 52 70755 632.81 460 447 111.1

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