ASTROSAT CZTI

Data Quality Report

Orbit 20151204_P01_998T02_9000000190_level2

Creation date: 2025-10-24T20:33:29.638201
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/AS1P01_998T02_9000000190cztM0_level2.fits modeM0/AS1P01_998T02_9000000190cztM0_level2_quad_clean.evt
Size (bytes)3,403,471,6805,525,625,600
Size3.2 GB 5.1 GB
Events in quadrant A19,747,11636,760,668
Events in quadrant B19,281,34836,562,025
Events in quadrant C18,970,37834,039,499
Events in quadrant D16,332,96031,284,688

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017607640
B018398910
C018366530
D017689310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A085520
B085500
C085520
D085520

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06040
B06040
C06040
D06040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A41956017610.419725%
B41955927380.652590%
C41955566191.577624%
D419546116002.764893%

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 509940 419597 0 0 0.00% 0.00%
B 509941 419571 0 0 0.00% 0.00%
C 509940 419559 0 0 0.00% 0.00%
D 509940 417822 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 17945 11.23 5117 4774 1173.0
A 7 110 17925 11.21 5117 4774 1173.0
A 14 188 14925 8.65 5117 4774 1173.0
B 2 9 15763 12.05 5114 4862 904.4
B 14 254 13092 9.1 5114 4862 904.4
B 2 8 12245 8.16 5114 4862 904.4
C 12 241 12982 6.93 5020 4644 1203.1
C 2 191 12784 6.77 5020 4644 1203.1
C 9 242 12479 6.51 5020 4644 1203.1
D 1 19 12304 7.34 4680 4293 1091.1
D 6 231 12001 7.06 4680 4293 1091.1
D 6 44 11928 7.0 4680 4293 1091.1

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