ASTROSAT CZTI

Data Quality Report

Orbit 20180430_A04_038T02_9000002068_level2

Creation date: 2025-11-22T03:30:42.333913
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/AS1A04_038T02_9000002068cztM0_level2.fits modeM0/AS1A04_038T02_9000002068cztM0_level2_quad_clean.evt
Size (bytes)337,956,480461,661,120
Size322.3 MB 440.3 MB
Events in quadrant A2,071,1773,073,649
Events in quadrant B1,997,3843,067,795
Events in quadrant C1,998,5262,841,131
Events in quadrant D1,686,4602,519,812

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07220
B07220
C011240
D011240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0760
B0760
C0760
D0760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0741850
B0785190
C0750780
D01034500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A354664081.150398%
B354686691.886207%
C354683651.029097%
D3546023486.621545%

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 41826 35412 0 0 0.00% 0.00%
B 41826 35405 0 0 0.00% 0.00%
C 41826 35410 0 0 0.00% 0.00%
D 41826 35403 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 2014 11.18 539 508 134.8
A 7 110 1646 8.44 539 508 134.8
A 9 19 1577 7.93 539 508 134.8
B 2 9 1742 12.1 527 506 102.1
B 14 254 1324 8.01 527 506 102.1
B 12 226 1306 7.83 527 506 102.1
C 3 126 1351 6.29 528 495 136.1
C 9 188 1319 6.06 528 495 136.1
C 2 191 1313 6.01 528 495 136.1
D 3 14 1229 6.03 481 438 131.3
D 10 189 1220 5.96 481 438 131.3
D 6 231 1201 5.81 481 438 131.3

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