ASTROSAT CZTI

Data Quality Report

Orbit 20200201_A07_112T01_9000003478_level2

Creation date: 2021-08-30T19:06:17.827808
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_112T01_9000003478cztM0_level2_bc.evt modeM0/AS1A07_112T01_9000003478cztM0_level2_quad_clean.evt
Size (bytes)721,756,800259,093,440
Size688.3 MB 247.1 MB
Events in quadrant A4,324,1831,639,323
Events in quadrant B5,090,4821,679,318
Events in quadrant C4,189,1391,603,636
Events in quadrant D6,894,1381,556,100

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04060
B04060
C04060
D04060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0413470
B0447630
C0413100
D0498620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0870
B0870
C0870
D0870

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19881780.392334%
B198763121.569732%
C198801950.980885%
D198814682.354006%

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 24076 19822 0 0 0.00% 0.00%
B 24076 19819 2 2 0.01% 0.01%
C 24076 19817 1 1 0.00% 0.01%
D 24076 19826 138 138 0.57% 0.70%

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 2 79 127202 535.9 1087 1070 235.4
A 13 254 32498 133.53 1087 1070 235.4
A 0 226 6952 24.99 1087 1070 235.4
B 0 189 329319 1615.34 1089 1066 203.2
B 0 219 237425 1163.12 1089 1066 203.2
B 12 17 172966 845.92 1089 1066 203.2
C 7 247 109415 442.48 1043 1038 244.9
C 2 16 15418 58.71 1043 1038 244.9
C 10 9 12222 45.66 1043 1038 244.9
D 1 52 2136331 8721.52 1056 1020 244.8
D 9 35 348267 1418.3 1056 1020 244.8
D 9 85 150008 608.53 1056 1020 244.8

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