ASTROSAT CZTI

Data Quality Report

Orbit 20180915_G08_012T01_9000002370_level2

Creation date: 2025-11-24T17:58:19.581439
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/AS1G08_012T01_9000002370cztM0_level2.fits modeM0/AS1G08_012T01_9000002370cztM0_level2_quad_clean.evt
Size (bytes)1,344,548,1601,272,847,680
Size1.3 GB 1.2 GB
Events in quadrant A8,199,5907,522,614
Events in quadrant B7,945,3147,590,938
Events in quadrant C8,101,6547,325,635
Events in quadrant D7,173,5906,809,795

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02889950
B02874010
C02906840
D02950760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02200
B02200
C02200
D02210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A027620
B027620
C027620
D027620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13574215001.105037%
B13574216141.189020%
C13574223791.752589%
D13574215521.143345%

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 161719 135713 0 0 0.00% 0.00%
B 161719 135722 0 0 0.00% 0.00%
C 161719 135720 0 0 0.00% 0.00%
D 161719 135681 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 7812 11.19 2134 1999 519.4
A 7 110 6460 8.59 2134 1999 519.4
A 9 19 6158 8.01 2134 1999 519.4
B 2 9 6378 10.69 2097 1998 409.6
B 2 8 5330 8.14 2097 1998 409.6
B 3 17 5167 7.74 2097 1998 409.6
C 12 241 5651 6.67 2145 2004 547.0
C 3 126 5530 6.45 2145 2004 547.0
C 2 191 5502 6.39 2145 2004 547.0
D 3 14 5248 6.27 2046 1868 539.3
D 6 231 5046 5.89 2046 1868 539.3
D 10 189 4988 5.79 2046 1868 539.3

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