ASTROSAT CZTI

Data Quality Report

Orbit 20171222_G08_065T01_9000001796_level2

Creation date: 2025-11-19T06:14:57.917901
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_065T01_9000001796cztM0_level2.fits modeM0/AS1G08_065T01_9000001796cztM0_level2_quad_clean.evt
Size (bytes)1,372,559,0401,426,484,160
Size1.3 GB 1.3 GB
Events in quadrant A2,877,3943,321,010
Events in quadrant B2,753,8363,219,705
Events in quadrant C2,891,4323,194,147
Events in quadrant D2,467,7282,914,733

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010651270
B012315470
C09324830
D011082790

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07210
B07210
C07210
D07210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A091360
B091360
C091360
D091360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A445320151083.392617%
B445314300786.754335%
C44531841560.933266%
D445313133993.008895%

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 79107 50104 0 0 0.00% 0.00%
B 79123 50089 0 0 0.00% 0.00%
C 79107 50112 0 0 0.00% 0.00%
D 79107 50108 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 2797 11.16 750 704 187.5
A 7 110 2416 9.13 750 704 187.5
A 0 30 2133 7.62 750 704 187.5
B 2 9 2243 10.69 728 694 144.9
B 14 254 1833 7.86 728 694 144.9
B 3 17 1819 7.76 728 694 144.9
C 12 241 2016 6.68 764 714 195.0
C 3 126 1941 6.29 764 714 195.0
C 3 158 1878 5.97 764 714 195.0
D 6 231 1844 6.43 705 643 186.9
D 7 5 1781 6.09 705 643 186.9
D 7 3 1702 5.67 705 643 186.9

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