ASTROSAT CZTI

Data Quality Report

Orbit 20220109_A11_046T07_9000004862_level2

Creation date: 2022-01-12T11:39:13.447580
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_046T07_9000004862cztM0_level2_bc.evt modeM0/AS1A11_046T07_9000004862cztM0_level2_quad_clean.evt
Size (bytes)3,070,160,640671,100,480
Size2.9 GB 640.0 MB
Events in quadrant A16,835,7684,073,466
Events in quadrant B18,009,5974,238,648
Events in quadrant C20,787,2864,233,055
Events in quadrant D33,566,1963,966,512

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02020
B02020
C02020
D02020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01419350
B01736230
C01458370
D01901500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011340
B011340
C011340
D011340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5556845298.150374%
B55568680912.253455%
C5556821183.811546%
D5556838146.863663%

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 75635 54717 10 10 0.01% 0.02%
B 75636 55568 99 99 0.13% 0.18%
C 75636 55568 357 357 0.47% 0.64%
D 75636 55569 969 969 1.28% 1.74%

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 5467156 8761.21 2870 2827 623.7
A 13 6 112084 175.18 2870 2827 623.7
A 13 254 89967 139.72 2870 2827 623.7
B 5 172 4063005 7196.62 2883 2829 564.2
B 0 190 1105744 1954.9 2883 2829 564.2
B 4 232 241457 422.96 2883 2829 564.2
C 9 187 2346283 3598.22 2912 2896 651.3
C 4 254 2323877 3563.81 2912 2896 651.3
C 15 214 2232858 3424.06 2912 2896 651.3
D 8 195 11913598 17525.75 2882 2799 679.6
D 8 230 2441761 3588.73 2882 2799 679.6
D 12 6 2075814 3050.27 2882 2799 679.6

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