ASTROSAT CZTI

Data Quality Report

Orbit 20170531_A03_046T01_9000001260_level2

Creation date: 2021-08-27T00:13:36.096913
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/AS1A03_046T01_9000001260cztM0_level2_bc.evt modeM0/AS1A03_046T01_9000001260cztM0_level2_quad_clean.evt
Size (bytes)3,018,830,4001,145,093,760
Size2.8 GB 1.1 GB
Events in quadrant A26,330,7227,844,684
Events in quadrant B14,735,9715,743,847
Events in quadrant C17,645,9067,807,821
Events in quadrant D27,010,8447,552,330

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018020
B018020
C018080
D018380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01510
B01480
C01490
D01460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02100630
B01409880
C01838300
D02125990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8897920812.338754%
B6606211021.668130%
C8924411121.246022%
D8879527463.092516%

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 114245 91456 244 244 0.21% 0.27%
B 81938 67700 31 31 0.04% 0.05%
C 114245 91590 7 7 0.01% 0.01%
D 114245 91374 292 292 0.26% 0.32%

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 8 5 6892271 7045.09 4476 4394 977.7
A 5 16 640110 650.23 4476 4394 977.7
A 1 162 538427 546.22 4476 4394 977.7
B 10 16 945264 1478.16 3329 3237 637.3
B 4 48 196452 303.18 3329 3237 637.3
B 6 51 182862 281.85 3329 3237 637.3
C 14 234 336160 346.42 4401 4350 957.8
C 8 128 27547 24.22 4401 4350 957.8
C 13 61 27521 24.19 4401 4350 957.8
D 1 52 4843706 4432.97 4373 4239 1091.7
D 2 14 2236181 2044.47 4373 4239 1091.7
D 6 225 803138 731.79 4373 4239 1091.7

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