ASTROSAT CZTI

Data Quality Report

Orbit 18218

Creation date: 2024-06-27T17:46:54.621265
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/AS1C04_009T03_9000002714_18218cztM0_level2.evt modeM0/AS1C04_009T03_9000002714_18218cztM0_level2_quad_clean.evt
Size (bytes)693,201,600184,452,480
Size661.1 MB 175.9 MB
Events in quadrant A4,557,8401,236,821
Events in quadrant B4,668,9281,255,437
Events in quadrant C4,596,3871,218,289
Events in quadrant D6,491,6001,182,358

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0204832
B0207902
C0203882
D0263902

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02060
B02060
C02060
D02060

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10013300.299611%
B10013460.459403%
C10013730.729052%
D100133233.225806%

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 11758 10015 1 1 0.01% 0.01%
B 11758 10015 4 4 0.03% 0.04%
C 11758 10015 0 0 0.00% 0.00%
D 11758 10015 212 212 1.80% 2.12%

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 15 174 73306 309.29 1164 1140 233.3
A 0 226 10182 38.75 1164 1140 233.3
A 3 137 8925 33.36 1164 1140 233.3
B 0 189 48566 213.0 1163 1132 222.7
B 12 111 26341 113.2 1163 1132 222.7
B 11 111 23233 99.24 1163 1132 222.7
C 14 238 174820 667.76 1119 1124 260.1
C 3 233 28912 106.83 1119 1124 260.1
C 8 128 12036 41.95 1119 1124 260.1
D 1 52 1460258 5334.1 1125 1091 273.6
D 7 238 446445 1628.02 1125 1091 273.6
D 2 33 145100 526.43 1125 1091 273.6

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