ASTROSAT CZTI

Data Quality Report

Orbit 20160822_G05_237T01_9000000620_level2

Creation date: 2025-11-04T23:53:28.808764
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/AS1G05_237T01_9000000620cztM0_level2.fits modeM0/AS1G05_237T01_9000000620cztM0_level2_quad_clean.evt
Size (bytes)1,359,671,0401,383,278,400
Size1.3 GB 1.3 GB
Events in quadrant A8,477,3668,742,358
Events in quadrant B8,174,5888,720,994
Events in quadrant C8,389,5388,384,252
Events in quadrant D5,843,2225,777,742

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02300
B02290
C02290
D02290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030600
B030520
C030520
D030500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03250170
B03320590
C03085780
D06232060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15000125301.686655%
B14999622241.482706%
C14998011900.793439%
D1495434850832.437493%

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 182879 150197 0 0 0.00% 0.00%
B 182879 150199 0 0 0.00% 0.00%
C 182879 150196 0 0 0.00% 0.00%
D 182879 149258 0 0 0.00% 0.00%

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 0 29 8499 11.39 2202 2051 566.3
A 14 188 8446 11.29 2202 2051 566.3
A 7 110 7441 9.52 2202 2051 566.3
B 2 9 6999 11.41 2157 2050 433.8
B 12 226 6238 9.65 2157 2050 433.8
B 14 254 5601 8.19 2157 2050 433.8
C 1 81 6320 7.26 2214 2043 589.1
C 1 80 6245 7.13 2214 2043 589.1
C 9 188 5663 6.15 2214 2043 589.1
D 11 82 4934 7.62 1667 1513 448.9
D 1 19 4397 6.42 1667 1513 448.9
D 6 231 4333 6.28 1667 1513 448.9

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