ASTROSAT CZTI

Data Quality Report

Orbit 20170617_G07_077T04_9000001312_level2

Creation date: 2025-11-14T15:59:54.122252
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_077T04_9000001312cztM0_level2.fits modeM0/AS1G07_077T04_9000001312cztM0_level2_quad_clean.evt
Size (bytes)270,852,480257,143,680
Size258.3 MB 245.2 MB
Events in quadrant A1,617,8521,493,432
Events in quadrant B1,571,9421,493,605
Events in quadrant C1,617,8021,450,362
Events in quadrant D1,394,0041,348,380

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05940
B05940
C05940
D05940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0672230
B0613210
C0605900
D0630820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A291195781.984958%
B291123521.209123%
C291122790.958368%
D291095091.748600%

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 34573 29122 0 0 0.00% 0.00%
B 34573 29121 0 0 0.00% 0.00%
C 34573 29122 0 0 0.00% 0.00%
D 34573 29121 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 1646 11.8 419 392 106.3
A 14 188 1621 11.57 419 392 106.3
A 14 204 1398 9.47 419 392 106.3
B 2 9 1363 11.41 414 394 84.9
B 14 254 1059 7.83 414 394 84.9
B 3 17 1054 7.77 414 394 84.9
C 1 81 1219 7.3 426 396 112.7
C 1 80 1179 6.95 426 396 112.7
C 12 241 1124 6.46 426 396 112.7
D 6 231 1083 6.71 397 360 107.7
D 3 31 996 5.91 397 360 107.7
D 10 189 985 5.8 397 360 107.7

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