ASTROSAT CZTI

Data Quality Report

Orbit 20170516_G07_087T01_9000001228_level2

Creation date: 2025-11-13T15:21:08.082319
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/AS1G07_087T01_9000001228cztM0_level2.fits modeM0/AS1G07_087T01_9000001228cztM0_level2_quad_clean.evt
Size (bytes)703,992,960748,428,480
Size671.4 MB 713.8 MB
Events in quadrant A4,291,4424,640,362
Events in quadrant B4,174,6564,637,441
Events in quadrant C4,231,1564,357,133
Events in quadrant D3,475,4663,887,808

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01803860
B01650190
C01542490
D02079540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015380
B015320
C015360
D015360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7499218202.426926%
B7501614871.982244%
C750285850.779709%
D7501060998.130916%

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 99490 75107 0 0 0.00% 0.00%
B 99490 75141 0 0 0.00% 0.00%
C 99490 75142 0 0 0.00% 0.00%
D 99490 73012 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 4219 11.45 1119 1050 276.7
A 7 110 3529 8.96 1119 1050 276.7
A 0 30 3239 7.91 1119 1050 276.7
B 2 9 3524 11.47 1102 1053 215.5
B 12 226 2843 8.31 1102 1053 215.5
B 14 254 2709 7.69 1102 1053 215.5
C 1 81 3134 7.1 1118 1039 295.1
C 1 80 3058 6.84 1118 1039 295.1
C 12 241 2965 6.53 1118 1039 295.1
D 3 14 2640 6.63 989 901 262.3
D 6 231 2513 6.15 989 901 262.3
D 1 3 2498 6.09 989 901 262.3

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